Hermes o la Entrada del Santuario (Spanish Edition)

This revaluation has been submitted to the OECD working group in order that this experiment can be used by international criticality safety engineers to validate calculations methods.

Al sol de la Poesía (Spanish Edition)

This work represents a large contribution to the recommendation of accurate calculation schemes and to the experimental validation of the CRISTAL package. These studies came up to the French Industry expectations. Development and experimental testing of the new safety-criticality Cristal package; Developpement et qualification experimentale du nouveau formulaire de surete-criticite Cristal. The cristal system includes two calculations routes: This revaluation has been submitted to the OCDE working group in order that this experiment can be used by international criticality safety engineers to validate calculations methods.

Exploration and development of Cerro Prieto. A brief retrospective of the exploration and field model development at Cerro Prieto are presented. Representative field models are presented for each of the work phases. A model integrating information from these studies was developed. Development and experimental testing of the new safety-criticality Cristal package. Oscilador para biosensores basado en microbalanza de cristal de cuarzo QCM.

Naturaleza fractal en redes de cristales de grasas. This review begins with information on fractality and statistical self-similar structure. Estimations for fractal dimension by means of equations relating the volume fraction of solid fat to shear elastic modulus G' in linear region are described. The influence of interesterification on fractal dimension decrease from 2, 46 to 2 ,15 for butterfat-canola oil blends is notable. This influence is not significant for fat blends without butterfat. The need for an increase in research concerning the relationship between fractality and rheology in plastic fats is emphasized.

Full Text Available In the course of a series of lectures on the subject of curtain walls, held at the Higher Technical College of Architecture, in Madrid, the author described his own experience whilst constructing a building designed by him and by Mr. De la Joya summarised the advantages that foreign experts attribute to curtain walls.

The lecturer then explained why, and in what aspects, he was in disagreement with the above supposed advantages. He dealt with these as follows: In terms of present day construction, with concrete blocks and lightweight flooring structures, it is not easy to save much weight, owing to the number of special fittings that are necessary to support and keep the curtain wall in place.

Although in theory a. It is difficult to reduce the cost of the foundations by fitting curtain walls, and any calculated saving in cost in this aspect is more theoretical than real. Building time estimates usually fail to work out in practice, and in addition to this, workmanship quality is not yet very satisfactory. Curtain walls require periodic overhauls, so that they do not age too rapidly, and in this sense they are no better than traditional walls. The lecturer also made a number of additional points, one of them being that he did not advise the use of curtain walls in Spain because of the cheapness of brickwalls, the climate, the high cost of air conditioning, etc.

He also emphasized how important it is to make a very. Evaluation of geologic characteristics at Cerro Prieto. Computerized well-log analysis of Cerro Prieto has led to the identification of a relatively large and irregular low-density volume extending from near the surface in the vicinity of Laguna Volcano to greater depths toward the northeast.

This low-density volume is located about a plane of symmetry of a self-potential anomaly and a group of northeast trending active faults. The presence of a volume of relatively high-density rock has been recognized at shallow depths in the initially developed part of the resource. It is believed to be due to minerals deposited by cooled, rising geothermal brine.

Storativity calculated from well logs at the south end of the western part of the field shows acceptable comparison with storativity calculated from well tests. The amount of fluid produced from the field during the period is greater than the amount in situ calculated from the completed interval thicknesses. Because this part of the field is still producing today, fluid must be recharging this part of the field.

The cristal right superior septal coronary artery and its relationship to anomalous left coronary origin. It supplies a variable volume of the superior interventricular septum, and can contribute to collateralization of the other septal vessels. When part or all of the left coronary artery LCA arises anomalously from the right coronary sinus, its passage to the left may be in the same pathway as a cristal artery, bearing a tell-tale septal vessel arising from its proximal segment.

This helps to differentiate it from one that has a higher pathway, running between the great vessels, and which may have a greater correlation with sudden cardiac death. En , se encuentran entre los mejor monitoreados de los glaciares tropicales, primero, gracias a un programa de estudio desarrollado por los peruanos.

This work is about the geochemical prospecting carried out into the Uruguay mining inventory framework. In this case the survey was in Cerro de las Cuentas mapping. The present work are within the framework and compiles the data obtained by means of the study of the perforations executed in the District Cerro Largo Sur of the detailed prospection of uranium minerals. The works began at the beginning of and continued until July; The headquarters of the program of prospection of uranium was carried out by Ing. In this report the conclusions drawn at the time of the detection of the works in the District already published, as well as the litologicos cuts of all the executed perforations are included.

Se tiene elprimer registro de Eleutherodactylus cruentus para Colombia y el primero de E. Criteria for determining casing depth in Cerro Prieto. On the basis of geological data obtained during drilling and its relation to electric logs, together with the problems that arose when drilling through formations until the production zone was reached, it is possible to establish the most suitable manner to line a well and thus formulate an optimum casings program. The main criteria to be taken into consideration in preparing such a program and its application in the drilling of wells programmed in Cerro Prieto to optimize and economize such drilling and achieve suitable techniques for well completion are presented.

The criteria are based on the characteristics of the Cerro Prieto field and on casing design factors, as well as a experience gained during drilling in such a field. Forest health in Canada, Montane cordillera ecozone This paper describes the key forest health issues affecting the 6 main forest types in Canada's Montane Cordillera ecozone in the central interior of British Columbia and the Alberta Foothills.

In order to protect and conserve biological diversity, the Canadian Council of Forest Ministers adopted national criteria to measure sustainable forest management. This report describes the Montane Cordillera landscape conditions, pre-industrial ecological influences, current ecological influences, and the impact of invasive alien insects and diseases on the diversity of tree species.

Pine forests in the Montane Cordillera ecozone are threatened by the mountain pine beetle. Fire suppression has also resulted in ecological changes to forests in the Montane Cordillera , including an increase in Douglas-firs, gradual replacement of Lodgepole pine forests, and reduced health of Ponderosa pine ecosystems. Alien insects are being monitored by provincial forestry agencies through annual surveys.

They are also being controlled through localized treatment programs. The impact of land use practices such as forest harvesting on forest structure and composition was also addressed. It was noted that the unrestricted movement of wood and forestry products also increases the threat of invasive alien diseases and insects.

The trees in this ecozone have not been damaged by air pollution. Geochronology of Quaternary glaciations from the tropical Cordillera Huayhuash, Peru. The Cordillera Huayhuash in the central Peruvian Andes Geomorphology and geochronology in the nearby Cordillera Blanca and Junin Plain reveal that the Peruvian Andes preserve a detailed record of tropical glaciation.

We have used in situ produced cosmogenic 10Be concentrations in quartz bearing erratics on moraine crests and ice-polished bedrock surfaces to develop an exposure age chronology for Pleistocene glaciation within the range. We have also collected sediment cores from moraine-dammed lakes and bogs to provide limiting 14C ages for glacial deposits.

The range displays a pronounced east-west variation in maximum down-valley distance from the headwall of moraine crests with considerably longer paleoglaciers in the eastern drainages. We suggest that valley morphology, specifically valley slope, strongly influences down-valley distance to the maximum glacier extent and potential for moraine preservation. Software data acquisition system for the ''Chateau de Cristal '' multicounter 74 BaF2. The ''Chateau de Cristal '' is a 74 BaF2 detector assembly.

Other detectors such as Ge up to 12 and particle detectors can be added to this multidetector. The data acquisition system hardware and software are implemented in 3 VME crates. The operating system is handled by Motorola microprocessors. This work is dedicated to the initialization and control tasks of the multidetector. All the software is written in Motorola assembly language [fr. Asimismo, se hace referencia las diferentes herramientas utilizadas por la estrategia urna de cristal del gobierno colombiano.

Geophysical investigations of magma plumbing systems at Cerro Negro volcano, Nicaragua. Previous studies have raised several questions as to the proper classification of Cerro Negro and its relation to neighboring Las Pilas-El Hoyo volcano. Analysis of Bouguer gravity data collected at Cerro Negro has revealed connected positive d Geochemistry of the Puna Austral and Cordillera Oriental basement. The basement is formed by high temperature amphibolite facies rocks ranulites degrees C and green schists.

They are represented by schists, paragneiss, orthogneiss, migmatites, few metabasites, marbles and chalcosilicatic banks. Hypotheses on the formation and evolution of the basement are presented. ABSTRACTBacillus subtilis, a bacterium useful in some biotechnology applications, contains enzymes such as amylases, which play an important role in several industrial processes.

In this work we have studied carbonate crystals produced by a B. Report of the Cerro Chato ultrabasic geophysical studies. This report refers to the obtained results of geophysical practiced during the year in the area of the ultrabasic of Cerro Chato, located in the area called Puntas del Malbajar in Durazno province. The aim was rehearsed an answer of an ultrabasic behaviour of the geophysical prospecting methods.

They were carried out studies in magnetometry, induced polarization, electromagnetism and resistivity measurements in electric vertical sound. As well conclusions as recommendations express that applied geophysical methods allow to make ultrabasic charts or maps. Geological map of Uruguay Esc 1,, Cerro Partido Sheet F This work is about the geological map of Uruguay Esc. The area corresponding to the Cerro Partido fotoplano is located in the orogenic belt or Don Feliciano belt. Cerro Negro near Leon, Nicaragua is a very young years , relatively small basaltic cinder cone volcano that has been unusually active during its short lifespan recurrence interval years , presenting a significant hazard to nearby communities.

These findings suggest that eruptions at Cerro Negro may be tapping a large magma reservoir beneath Las Pilas-El Hoyo, implying that Cerro Negro should be considered the newest vent on the Las Pilas-El Hoyo volcanic complex. As such, it is possible that the intensity of volcanic hazards at Cerro Negro may eventually increase in the future to resemble those pertaining to a stratovolcano. Exploration and development of the Cerro Prieto geothermal field. A multidisciplinary effort to locate, delineate, and characterize the geothermal system at Cerro Prieto, Baja California, Mexico, began about 25 years ago.

It led to the identification of an important high-temperature, liquid-dominated geothermal system which went into production in An evaluation of the different studies carried out at Cerro Prieto has shown that: Thirty-two chemical elements were measured: Two multivariate statistical methods, cluster analysis and principal component analysis, were performed on the dataset to examine similarities between samples and to establish compositional groups.

The statistical analyses of the dataset suggest that the pottery samples form a unique chemically homogeneous group, with the exception of one pottery sample. The compositional data were compared to an existing Mesoamerican ceramic database. It was found that the newly generated data fit best with data from a previous chemical analysis of pottery from the Malpaso Valley.

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However, despite the apparent similarity, pottery samples from the site of Cerro de Las Ventanas represent a new and unique chemical fingerprint in the region. While a number of studies investigate the geochemistry and stress regime of the volcano, subsurface structures have only been studied by diffuse soil gas surveys. These studies have raised several questions as to the proper classification of Cerro Negro and its relation to neighboring volcanic features.

To address these questions, we collected gravity measurements around Cerro Negro volcano in an attempt to delineate deep structures at the volcano. The resulting complete Bouguer anomaly map revealed local positive gravity anomalies wavelength 0. Further analysis of these gravity data through inversion has revealed both local and regional density anomalies that we interpret as intrusive complexes at Cerro Negro and in the Nicaraguan Volcanic Arc.

The local density anomalies at Cerro Negro have a density of kg m-3 basalt and are located between and m above sea level. The distribution of recovered density anomalies suggests that eruptions at Cerro Negro may be tapping an interconnected magma plumbing system beneath El Hoyo, Cerro La Mula, and Cerro Negro, and more than seven other proximal volcanic features, implying that Cerro Negro should be considered the newest cone of a Cerro Negro-El Hoyo volcanic complex. I cristalli sonici come barriere antirumore - Sonic crystals as tunable noise barriers.

Infine i valori di Sound Insulation misurati per un cristallo sonico sono confrontati con valori misurati su barriere tradizionali, evidenziando come il cristallo sonico permetta di raggiungere un isolamento confrontabile con il valore soglia di Insertion Loss raggiungibile a causa della diffrazione del bordo superiore della barriera.

The paper presents the results of some experimental investigations carried out at the University of Bologna by discussing Insertion Loss measurements, measurements performed inside the lattice and sound intensity measurements. Finally, the Sound Insulation Index measured for a sonic crystal is compared to the values measured for common noise barriers, pointing out that sonic crystals reach insulation values comparable to the maximum Insertion Loss achievable due to the top edge diffraction.

Se concluye discutiendo las ventajas y limitaciones del punto de vista adoptado en este trabajo.. A new species of salamander Bolitoglossa: Plethodontidae from the Cordillera Oriental of the Colombian Andes. Here we describe a new species of the genus Bolitoglossa, named Bolitoglossa guaneae sp. The highest number of species of this genus is found in the cloud forests located in the western flank of the Cordillera Oriental.

Cerro Largo - Cerro Amarillo is a Quaternary medium size m high, 2 km 2 rhyolite dome complex located close to the Chile-Argentina border, reaching a height of m, between the headwaters of the Rio Colina and the Nieves Negras Pass. It overlies a broad anticline of thick Middle Jurassic pelites Alvarez et al. Thiele includes this complex in his 'Unidad Volcanica Antigua', a Pleistocene composite map unit made up of andesites and trachyandesites. Both the lack of younger overlying units and freshness of its components, together with preservation of the unconsolidated, easily eroded pyroclastic deposits at its base, suggest, however, that it is not older than Pleistocene au.

Full Text Available In order to understand the geological and hydrogeological processes influencing the hydrogeochemical behavior of the Cerro Prieto Geothermal Field CP aquifer, Mexico, a characterization of the water samples collected from geothermal wells was carried out. Different hydrochemical diagrams were used to evaluate brine evolution of the aquifer.

To determine pressure conditions at depth, a calculation was performed using hydrostatic and lithostatic properties from CP, considering geological characteristics of the study area, and theoretical information about some basin environments. Groundwater shows hydrogeochemical and geological evidences of the diagenetic evolution that indicate overpressure conditions. Some physical, chemical, textural, and mineralogical properties reported in the lithological column from CP are explained understanding the evolutionary process of the sedimentary material that composes the aquifer.

Progress on the biphase turbine at Cerro Prieto. The status of a Biphase turbine power plant being installed at the Cerro Prieto geothermal field is presented. The major modules for the power plant are completed except for a back pressure steam turbine. The power plant will be started in April with the Biphase turbine alone followed by the addition of the steam turbine module two months later.

The current power plant performance level is kWe due to a decline in the well. An increase in power output to kWe by adding the flow from another well is planned. The addition of five Biphase power plants with a total power output of A Wari Enclave Interacting with TiwanakuWari expansion to the extreme south of Peru is a phenomenon whose study began 20 years ago, with the discovery of a great arquitectonic complex at Cerro Baul. The excavations undertaken in the last 3 years have revealed that Cerro Baul was more than a military fortress; it was the most important political and religious center that Wari established in the only region where there is direct evidence of interaction with Tiwanaku, the altiplano s Mathematical models to predict nematic transition temperatures TN were derived.

This is the first time that Principal Component Analysis was used to predict liquid crystal properties, leading to the derivation of local specific models for different molecule sets. Results indicate that local models have higher prediction capabilities than global models, which is consistent to our initial assumption. This methodology will be used in the study of liquid crystals used in pharmaceutical applications. Denudation rates and tectonic geomorphology of the Spanish Betic Cordillera.

The tectonic control on landscape morphology and long-term denudation is largely documented for settings with high uplift rates. Relatively little is known about the rates of geomorphic response in areas of low tectonic uplift. Here, we evaluate spatial variations in denudation of the Spanish Betic Cordillera based on cosmogenic 10Be-derived denudation rates. Denudation rates are compared to published data on rock uplift and exhumation of the Betic Cordillera to evaluate steady-state topography. Catchment-wide denudation is linearly proportional to the mean hillslope gradient and local relief.

Despite large spatial variation in denudation, the magnitude and spatial pattern of denudation rates are generally consistent with longer-term local uplift rates derived from elevated marine deposits, fission-track measurements and vertical fault slip rates. This might be indicative of a steady-state topography where rock uplift is balanced by denudation. Tectonic and paleoenviromental reconstruction. Het Westelijk gedeelte van de Republiek Columbia Zuid Amerika wordt ingenomen door de Cordilleras de los Andes, welke in genoemde republiek uit drie hoofdketens bestaat, t.

Een studie werd gemaakt van een centraal gelegen Strook. Report of mortmorilloniticas clay in the Medina swamp Cerro Largo district. This report describes the prospect ion work for the montmorillonitics clay in the region of Medina swamp in Cerro Largo district. The existence of new deposits was detected by cartography and geological study. The technical University UTU of Uruguay requested and Hidrogeologic study with the aim to analyze the factibility to discover underground stream waters which supply groundwaters into agro school Ing Agr.

A new climate and glacier baseline for the Cordillera Vilcanota, Peru, reduces critical information gaps. The Cordillera Vilcanota in the Southern Peruvian Andes is the second largest ice-covered Cordillera in Peru after the Cordillera Blanca and serves for the Cusco Region as a temporary water storage for fresh-water and hydropower generation and irrigation. Despite the Cordillera Vilcanota's size and socio-economic relevance, there has so far no comprehensive baseline data been available for climate and glacier evolution. In the framework of two jointly launched -Peruvian-Swiss climate change impact and adaptation programs Climate Change Adaptation Programm - PACC; Glacier Change Adaptation and Desaster Risk Reduction Programm - Glacier significant efforts have been undertaken and are on the way to create a climate, glacier and hazard baseline for the Cordillera Vilcanota.

Because of the remoteness of the area and the scarcity of available data, multiple sources such as climate stations, climate reanalysis and satellite data have been collected, processed and analyzed. These high numbers corroborate studies from other glacierized cordilleras in Peru. The climate data show overall a moderate increase in air temperature, and mostly weak and not significant trends for precipitation sums, which probably cannot fully explain the observed substantial ice loss. The likely increase of specific humidity in the upper troposphere, where the glaciers are located, probably played a major role in the observed massive of the Cordillera Vilcanota over the past decades.

The mass balance measurements initiated in on two glaciers of the Cordillera Vilcanota, and the climate station installed in on one of the glaciers, preliminarily indicate that ice loss in water equivalent is clearly lower that in the Cordillera Blanca. In the near future the data will provide new and important insights on climate and.

Cross-cutting relationships, geomorphology, and correlation with surface exposure dated moraines in the nearby Cordillera Blanca suggest the region preserves a rich record of tropical glaciation. In order to determine the glacial chronology we mapped and dated glacial features of the Jahuacocha valley which drains the western side of the range and two eastern drainages, the Mitococha valley, and the Carhuacocha valley.

We sampled quartz-bearing erratics on moraine crests as well as ice-polished bedrock surfaces for exposure age dating using in situ produced cosmogenic 10Be and 26Al. Our preliminary results suggest that all three valleys experienced a very similar glacial history with minor differences likely due to the variations in valley morphology. Comparing the chronology of glaciation in the Cordillaera Huayhuash with that in regions to the. Uranium and Molybdenum extraction from a Cerro Solo deposit ore. Cerro Solo, located in Chubut, Argentina, is a sandstone type uranium-molybdenum deposit.

Good recovery of both elements can be achieved by acid leaching of the ore but the presence of molybdenum in pregnant liquors is an inconvenient to uranium separation and purification. A two steps process is developed. A selective alkaline leaching of the ore with sodium hydroxide allows separating and recovering of molybdenum and after solid-liquid separation, the ore is acid leached to recover uranium.

Performance of casings in Cerro Prieto production wells. A careful evaluation of different production casings used at Cerro Prieto from to date has shown that the following casings have yielded particularly impressive results: These casings differ from others of the same diameter but lighter weight which were also used at the field.

The results are favorable in spite of severe construction problems, especially the loss of circulation during cementing operations, which we encountered in some of the wells where these casings were used. The use of gravity-fed fine sand as packing material and the arrangement of the production and intermediate casings were important in avoiding damage due to tension-compression stresses and, above all, damage due to internal or external corrosion over time. This situation is clearly evidenced if we compare the damage to the above casings with that experienced by grade N production casings, especially in a corrosive environment.

Recent glacier retreat and climate trends in Cordillera Huaytapallana, Peru. We analyzed 19 annual Landsat Thematic Mapper images from to to determine changes of the glaciated surface and snow line elevation in six mountain areas of the Cordillera Huaytapallana range in Peru.

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In contrast to other Peruvian mountains, glacier retreat in these mountains has been poorly documented, even though this is a heavily glaciated area. These glaciers are the main source of water for the surrounding lowlands, and melting of these glaciers has triggered several outburst floods. Moreover, several new lakes formed in the recently deglaciated areas. There was an increase in precipitation during the wet season October-April over the year study period.

The significant increase in maximum temperatures may be related to the significant glacier retreat in the study area. Climate simulations for to , based on the most optimistic assumptions of greenhouse gas concentrations, forecast a continuation of climate warming at the same rate as documented here. Such changes in temperature might lead to a critical situation for the glaciers of the Cordillera Huaytapallana, and may significantly impact the water resources, ecology, and natural hazards of the surrounding areas.

As tropical glaciers continue to rapidly retreat in the Cordillera Blanca, Peru, dry-season water resources are becoming more dependent on groundwater baseflow. Therefore, understanding the flux and storage of proglacial groundwater is necessary to forecast how groundwater storage can offset decreasing water resources. Recent studies of the Rio Santa Watershed, which drains the western slopes of the Cordillera Blanca, have identified that groundwater is the largest contributor to outflow from many watersheds during the dry season and that the flux of groundwater is temporarily available clay to silt sized glaciolacustrine material at each drill site.

Additionally numerous discontinuous sand lenses and localized glaciofluvial gravel deposits were observed within the clay layer. The glaciolacustrine deposits behave as confining units that were capable of generating localized artesian conditions in the coarse grain units. The occurrence of the clay units adjacent to the main stream channels suggests that the flatness of the valley floors is not the result of river meander.

The coarse grained units have the potential to act as important aquifers with significant groundwater storage and flow. Our preliminary findings indicate that the course grained units are important hydrogeological conduits with the ability to buffer low flow conditions in proglacial streams during the dry season. We present a new schematic model of how groundwater moves through these important proglacial environments, providing temporal storage of glacial meltwater and precipitation.

Full Text Available El Sistema de Fallas de la Cordillera de Domeyko, de rumbo esencialmente norte-sur, es paralelo a la fosa chileno-peruana en el norte de Chile. Se analizaron los desplazamientos en el rumbo y en la vertical de una de sus fallas maestras: The displacement history of the Sierra de Varas Fault, a master fault of the mentioned system, was examined in detall in the. The neighbouring El Hoyo complex, of which Las Pilas is the dominant edifice, is a much larger and older complex with milder and less frequent eruptions.

Previous studies have suggested a deep link beneath these two closely spaced volcanoes McKnight, ; MacQueen, Melt inclusions were collected from various tephra samples in order to determine whether a connection exists and to delineate the features of this link. Major, volatile, and trace elemental compositions reveal a distinct geochemical continuum with Cerro Negro defining the primitive endmember and El Hoyo representing the evolved endmember.

Magmatic conditions at the time of melt inclusion entrapment were estimated with major and volatile contents: Trace element contents are distinct and suggest Cerro Negro magmas fractionally crystallise while El Hoyo magmas are a mix between primitive Cerro Negro melts and residual and evolved El Hoyo magma. Modelling of end member compositions with alphaMELTS confirms the unique nature of El Hoyo magmas as resulting from incremental mixing between Cerro Negro and residual evolved magma at 4 km depth.

Combining all available literature data, this study presents a model of the interconnected subsurface plumbing system. The main implications of this study are the classification of Cerro Negro as the newest conduit within the El Hoyo Complex as well as the potential re-activation of the El Hoyo edifice. Emplacement and deformation of the Cerro Durazno Pluton delineates stages of the lower Paleozoic tectono-magmatic evolution in NW-Argentina.

Regional-scale transpression and transtension are considered to be important in the lower Paleozoic tectono-magmatic evolution of metamorphic and granitoid basement rocks of the southern central Andes. In order to test whether such kinematic changes affected Paleozoic basement rocks on the local scale, i. The results of our analysis point to the following stages in the geodynamic evolution of this area: This lead to the formation of schists and migmatites characterized by pervasive planar and linear mineral shape fabrics and the growth of andalusite, cordierite and fibrolite.

These fabrics are concordant to the NE-SW striking intrusive contact with migmatitic host rocks. The lack of submagmatic or high-T solid-state fabrics in the CDP may indicate that cooling and solidification of granitoid magma was not accompanied by regional deformation. Alternatively, emplacement of granitoid magma may have been facilitated by the creation of open space at mid-crustal level induced by regional deformation. This is evident by NW-SE striking metamorphic foliation surfaces transecting magmatic shape fabrics at high angles.

During this deformation, the pluton was thrust on a SW-dipping shear zone toward the NE over low-grade metamorphic host rocks which lead to a condensation of metamorphic isograds in the host rocks. Ages of strained pegmatitic dikes indicate that this deformation occurred at about Ma.

In summary, the difference in age. Precise adjustment of the orientation of a crystal mounted on a goniometric head; Reglage precis de l'orientation d'un cristal monte sur une tete goniometrique. Trigonometric calculus required to give the orientation of a crystal with a good accuracy, is presented in order to show the use of an E computer. Germanium enrichment in supergene settings: Supergene nonsulfide ores form from the weathering of sulfide mineralization.

Ore Geol Rev Germanium concentrations measured in both goethite mean values to ppm, max ppm and hemimorphite mean values 39 to ppm, max ppm are similar to concentrations measured in hypogene sphalerite. Additionally, the Ge concentrations recorded in bulk rock analyses of sphalerite-bearing and oxidized samples are also similar. A persistent warm-humid climate is interpreted for the region, resulting in the development of an oxidation zone favoring the formation of abundant Zn hydrosilicates and Fe hydroxides, both able to incorporate Ge in their crystal structure. In this scenario, Ge has been prevented from dispersion during the weathering of the Ge-bearing sulfide bodies and remains in the resultant nonsulfide ore.

The Northern Cordillera , which encompasses western Canada and eastern Alaska, is a complex tectonic puzzle. Past terrane accretions, the present collision of the Yakutat block, large-scale plate motions, and past and present glacier change have created a tectonic landscape that includes a major transform system, most of the highest peaks in North America, and far-flung ongoing distributed deformation.

We present an updated GPS velocity field as well as a new integrated tectonic block model for the region. The style of deformation varies through the region. Surrounding the Yakutat collision, the model includes a number of small blocks that indicate rotations to the east, north, and west as material moves away from the collisional front. These small blocks also show evidence of internal deformation. Farther from the collisional front, blocks are larger and appear to behave more rigidly.

In the south, northwestward motion resulting in a prominent band of coastal shear extends from Vancouver Island to Glacier Bay. In the Arctic, small southeastward motions in Alaska transition to easterly motion in Canada that extends to the Mackenize Mountains near the Cordillera -craton boundary. A number of faults and fault systems accommodate relative Pacific-North America plate motion in the region, although the significant majority is along the Fairweather-Queen Charlotte transform system and the St.

Along the Fairweather-Queen Charlotte system, the motion is dominantly dextral with increasing oblique transpression to the south corresponding to a change in margin trend. At the northern end of the transform system, motion is distributed onto multiple faults. The eastern Denali fault presently plays a minor role in accommodating.

Cerro del Agua scoria cone m. Dos Cerros is a lava shield which covers an area of The Dos Cerros eruption took place close to 14, yr BP as constrained by radiocarbon dating. Rocks from these three volcanoes are olivine-hypersthene normative basaltic andesites and andesites with porphyritic, aphanitic, and glomeroporphyritic textures. Pelagatos rocks also present quartz xenocrysts.

Due to their high Cr and Ni contents, and high Mg s, Pelagatos rocks are considered to be derived from primitive magmas, hence the importance of this volcano for understanding petrogenetic processes in this region. Major and trace element abundances and petrography of products from these volcanoes indicate a certain degree of crystal fractionation during ascent to the surface. However, the magmas that formed the volcanoes evolved independently from each other and are not cogenetically related. There is no clear evidence of important crustal contributions in the compositions of Pelagatos and.

Evaluation of the Cerro Solo nuclear ore, province of Chubut. The Cerro Solo project within the frame of uranium exploration in Argentina. The Cerro Solo ore deposit was selected by the CNEA to invest in an assessment project because of their promising grade and amount of known and potential resources, significant to Argentina's uranium requirements. The deposit, which is located in the central region of the Chubut Province, belongs to the sandstone type and is hosted by the cretaceous Chubut Group.

Technical studies carried out forecast an important growth of nuclear capacity to meet Argentina's energy requirements in the first two decades of of the the next century. To be in position to confront the challenge presented by increasing uranium resources to fuel the nuclear powers plants it is very important, as a first step, to improve the geological knowledge of uranium favorability in the country.

The preliminary results of the Cerro Solo project indicate that the eastern slope of the Pichinan hills is a promising area for development of uranium resources, increasing the favorability of the San Jorge Basin in order to allow contributing to meet future uranium requirements. The Cerro Solo Project was planned in a sequential manner, as a multidisciplinary effort which includes studies on: Among the mining methods, studies include the alternative of the in-situ leaching technology, which is becoming a low producing cost interesting possibility.

Mining inventory of Uruguay. Results of geochemical prospecting of Cerro Partido fotoplano. This work is about the analitical results of the geological prospection carried out in Cerro Partido zone within the framework of Mining inventory of Uruguay. In this fotoplano Esc. Forecast of environmental impact in the evaluation of Cerro Solo nuclear mine. This work presents a project for the study of the environmental impact of the Cerro Solo uranium mine. The survey is to be carried out performing different kinds of studies: When the burn went out of control and became a wildfire, it attracted worldwide attention because it threatened the birthplace of the atomic bomb, Los Alamos National Laboratory LANL.

Was LANL prepared for a fire? What lessons have been learned? Investigation of a measles outbreak in Cordillera , northern Philippines, Full Text Available Introduction: Measles is a highly infectious viral illness that remains one of the leading causes of death among children worldwide. In the Philippines, decreasing routine vaccination coverage from to led to local measles outbreaks. A team investigated a measles outbreak reported in Cordillera of the Philippines in May Measles case data with symptom onset from 2 February to 27 May were obtained from official sources and verified on site.

Data included age, sex, residential address, signs and symptoms and vaccination status. Active case-findings were also conducted for contacts of these cases. The living environments of the cases were investigated. A survey was conducted with the cases and caregivers to understand their knowledge and attitudes about measles.

There were 50 measles cases identified with an age range from six months to 32 years median: Overcrowded living environments were observed among many cases. This measles outbreak occurred in an area with low immunization coverage. Also, we recommend health education campaigns to include components that address misconceptions about measles. Late Pleistocene glacial fluctuations in Cordillera Oriental, subtropical Andes.

The behavior of subtropical glaciers during Middle to Late Pleistocene global glacial maxima and abrupt climate change events, specifically in Earth's most arid low-latitude regions, remains an outstanding problem in paleoclimatology. The present-day climate of Cordillera Oriental, in arid northwestern Argentina, is influenced by shifts in subtropical climate systems, including the South American Summer Monsoon.

La Busqueda Quinta (Spanish Edition)

Reconstructed ELAs of the former glaciers exhibit a rise from east to west that resembles the present subtropical climate trajectory from the Atlantic side of the continent; hence, we infer that this climate pattern must have been present in the past. Based on comparison with other low-latitude paleoclimate records, such as those from lakes and caves, we infer that both temperature and precipitation influenced past glacial occurrence in this sector of the arid Andes.

Role of erosion and isostasy in the Cordillera Blanca uplift: Insights from landscape evolution modeling northern Peru, Andes. The processes driving uplift and exhumation of the highest Peruvian peaks the Cordillera Blanca are not well understood. Uplift and exhumation seem closely linked to the formation and movement on the Cordillera Blanca normal fault CBNF that delimits and shapes the western flank of the Cordillera Blanca.

Several models have been proposed to explain the presence of this major normal fault in a compressional setting, but the CBNF and the Cordillera Blanca recent rapid uplift remain enigmatic. Whereas the Cordillera Blanca morphology demonstrates important erosion and thus a significant mass of rocks removal, the impact of erosion and isostasy on the evolution of the Cordillera Blanca uplift rates has never been explored.

We address the role of erosion and associated flexural rebound in the uplift and exhumation of the Cordillera Blanca with numerical modeling of landscape evolution. We perform inversions of the broad features of the present-day topography, total exhumation and thermochronological data using a landscape evolution model FastScape to provide constraints on the erosion efficiency factor, the uplift rate and the temperature gradient.

Our results evidence the not negligible contribution of erosion and associated flexural rebound to the uplift of the Cordillera Blanca and allow us to question the models previously proposed for the formation of the CBNF. Bufonidae en los farallones de Cali, a m de altura. Results of a geochronology program for ore deposits in this metallogenic province, in addition to existing geochronological control of the ore deposits host rocks mainly intrusive allowed to define four different Metallogenic Epochs which could be extended to other zones in the Coastal Cordillera au.

Full Text Available Zn-bearing phyllosilicates are common minerals in nonsulfide Zn deposits, but they seldom represent the prevailing economic species. However, even though the presence of Zn-bearing clays is considered as a disadvantage in mineral processing, their characteristics can give crucial information on the genesis of the oxidized mineralization.

In both of the deposits, Zn-bearing micas and clays occur as an accessory to the ore minerals. Sporadic hendricksite was also identified in the Cristal nonsulfide mineral assemblage, whereas at Mina Grande, the fraipontite-zaccagnaite 3R-polytype association was detected. The identified zaccagnaite polytype suggests that both fraipontite and zaccagnaite are genetically related to weathering processes. The hendricksite detected at Cristal is a product of hydrothermal alteration, which is formed during the emplacement of sulfides.

We are here today to discuss two related issues, lessons learned from the recent Cerro Grande fire, and, on a broader note, actions needed to mitigate current hazardous forest conditions in the interior West This work is about the ultramafic rocks which its chemistry composition fluctuate since the basic to the ultra basic field and appear in the nascent of the Las Palmas stream near Las Canias and Cerro Chato district.

Ethno—botanical survey of edible wild fruits in Benguet, Cordillera administrative region, the Philippines. Benguet province in the Cordillera region provides a diversity of edible wild fruits. The data gathered from the study signifies that collection, processing and utilization of edible wild fruits are still part of the daily activities of the people in Benguet. Petrografic description of some igneous rocks from the Cordillera of South Mendoza, in the Argentine.

Comparatively little is yet known of the intricate igneous history of the Cordillera of South Mendoza. Almost all the knowledge we have is due to the field- and stratigraphical work of Dr. Gerth of Leiden bibl. We present experimental evidence of enhanced second harmonic generation in planar lithiumniobate waveguides by using a photonic crystal on the waveguide. The enhanced signal was observed by using a Nd: YAG pump laser in both continuous mode c. This last produced sub-nanojoules J average power pulses with picoseconds s time duration. Phase matching conditions and the conversion efficiency process were improved because of the geometrical dispersion introduced in waveguide modes inside of the photonic band gap structure PBG at fundamental and second harmonic frequencies.

Except rare exceptions, the Paracas society of the Ica valley has been extensively studied from decontextualized materials, including pottery collected from clandestine tomb excavations in the Ocucaje basin. Works carried out in the south of Cerro Largo district. During the carried out work of radimetric preliminary Investigation in the northeast of the uraniferous country were detected radimetric anonalias which are associated to the formation San Gregorio and Tres Islas. Later the works of prospection ratified those anomalies to which they defined in the environs other anomalies.

The studies of revision of these conducted anomalies they took to conclude the necessity to carry out a detailed study of the area to that district was denominated Cerro Largo Sur. Relationship between water chemistry and sediment mineralogy in the Cerro Prieto geothermal field: The chemical compositions of waters collected from the Cerro Prieto geothermal production wells and hydrothermal emanations are different.

Compared to the Cerro Prieto well waters, the surficial waters generally contain significantly less potassium, slightly less calcium and chloride, and significantly more magnesium and sulfate. In comparison to the unaltered sediments, the changes in the mineralogy of the altered sediments appear to be controlled by the type of emanation well, spring, mud pot, geyser, fumarole, or cold pool. However, an increase in quartz and potassium feldspar percentages seems to be characteristic of the majority of the sediments in contact with geothermal fluids.

Preliminary attempts to model the chemical processes occurring in the Cerro Prieto geothermal field using chemical equilibrium calculations are reported. Then the theoretical mineral composition of altered sediments was predicted and compared to the mineralogy actually observed in the solid samples. Evolution of the Cerro Prieto geothermal system as interpreted from vitrinite reflectance under isothermal conditions. Temperature estimates from reflectance data in the Cerro Prieto system correlate with modern temperature logs and temperature estimates from fluid inclusion and oxygen isotope geothermometry indicating that the temperature in the central portion of the Cerro Prieto System is now at its historical maximum.

Isoreflectance lines formed by contouring vitrinite reflectance data for a given isothermal surface define an imaginary surface that indicates an apparent duration of heating in the system. The Cordillera Blanca mountain range is the highest in Peru and contains many of the world's tropical glaciers.

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4. LAttentato (La Tavola di Smeraldo Vol. 2) (Italian Edition).
5. Zoo Academy (Teil 1-3/Volume 1-3): Kinderbuch Deutsch-Englisch/Bilingual Childrens Book German-English (Zoo Academy - Bilingual German/English)?

This region is severely impacted by climate change causing accelerated glacier retreat. Secondary impacts of climate change on glacier retreat include stress on water resources and the risk of glacial lake outburst floods GLOFs from the many lakes that are forming and growing at the base of glaciers. A number of GLOFs originating from lakes in the Cordillera Blanca have occurred over the last century, several of which have had catastrophic impacts on cities and communities downstream.

Glaciologists and engineers in Peru have been studying the lakes of the Cordillera Blanca for many years and have identified several lakes that are considered dangerous. However, a systematic analysis of all the lakes in the Cordillera Blanca has never before been attempted. It comes with a hand bar to provide you more grip.

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