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This book aims to give the first comprehensive explanation of the metallogenic areas of Fennoscandia, which have recently been described in the Metallogenic Map of the Fennoscandian Shield. The Fennoscandian metallogenic map shows the extent of presently known metallogenic areas.
Many Third World and developing countries rely mainly on the utilisation of their natural resources to sustain their economic development. In the Philippines in particular, the exploitation of mineral resources has traditionally been a significant component of the Philippine economy (Domingo, 1993).
В Геологическом сборнике Словацкой академии наук — Geologica Carpathica — публикуются оригинальные статьи по результатам научных исследований альпийско-карпато-балканской системы, тектонике, стратиграфии, палеонтологии, геологии месторождений полезных ископаемых, геохимии, минералов и петрографии. Кроме того в сборнике печатаются официальные материалы секции Карпато-Балканской Геологической Ассоциации, рецензии трудов и друше статьи библиографического характера.
Comme tous les êtres vivants, depuis qu’il existe, l’Homme doit non seulement assurer sa nourriture, condition essentielle de sa maintenance, mais il doit aussi faire face aux conséquences des manifestations internes et externes de son environnement. Ces interactions entre l’Homme et son cadre de vie représentent une préoccupation majeure permanente, puisqu’elles conditionnent notre vie et l’évolution biologique de tous les êtres vivants.
Dans la préface de notre premier volume nous avons fait, pour ainsi dire, l’histoire du livre que nous présentons au public; nous avons dit quelles circonstances nous avaient réunis dans une pensée commune, quels liens d’amitié s’étaient formés entre nous, et comment la haute protection de Sa Majesté Impériale et celle du ministre éclairé qui présidait alors au département des finances et des mines, nous avaient encouragés et secondés dans l’exécution d’un projet, qui nous paraissait d’abord au dessus de nos forces.
The Collahuasi district is located in northeastern Chile, approximately 200 km southeast of the port of Iquique. It defines an area of 1200 km2 in the Western Cordillera of the Andes Mountains, between altitudes of 4000 and 5000 m above sea level. The district hosts a cluster of mineralised centres that currently comprise three porphyry copper, associated high level epithermal vein, and palaeogravel-hosted exotic copper deposits. The Quebrada Blanca, Ujina and Rosario porphyry copper deposits are currently in production, as are the Huinquintipa exotic copper accumulations. The Collahuasi porphyry deposits are spatially associated with the West Fissure/Domeyko Fault System and appear to have been emplaced during a period of dextral transpression between 35-34 Ma.
Since the fourth edition of Geology and Economic Minerals of Canada was published in 1957 our knowledge of the geology of Canada has increased greatly. Heretofore, geological information was meagre for many parts of the country, although detailed but isolated information was available for the mineral producing areas and more accessible regions. A large part of the new knowledge has been gained in the course of systematic geological mapping; by 1957 nearly 75 per cent of Canada was still unmapped geologically whereas in 1968 only 15 per cent remained unmapped at reconnaissance scales. The important element of continuity has been established by the initial mapping, so that it is now possible to assess and present a broad range of data in both geological and tectonic terms of reference. Of the total geological research in Canada, however, only a part has been directed towards the regional type of investigation; continuing studies have been made of many matters of economic and scientific interest, not only by the Geological Survey of Canada but also by provincial organizations, the mining and petroleum industries, consultants, and the universities (see Appendix). <...>
Western Canada is the part of Canada that lies west of the Precambrian rocks of the Canadian Shield. It includes the geological regions known as the Interior Platform, the Cordilleran Orogen, and parts of the Pacific and Arctic Continental Shelves and Coastal Plains (Fig. VIII-1). The Interior Platform, underlain by Phanerozoic sedimentary rocks, is the northwestern part of the North American craton, the stable interior region of the continent. The nearly horizontal bedrock is covered by a thick mantle of glacial drift to form the plains and plateaux of the Interior Plains physiographical province. It is a region of grassland, forest, and tundra, 775,000 square miles in extent, that embraces parts of the prairie provinces of Manitoba, Saskatchewan, and Alberta, the northeast corner of British Columbia, and much of western District of Mackenzie, Northwest Territories.
Update of the Geologic Setting and Porphyry Cu-Mo Deposits of the Chuquicamata District, Northern Chile
Geologic Overview of the Escondida Porphyry Copper District, Northern Chile
Geologic Setting and Evolution of the Porphyry Copper-Molybdenum and Copper-Gold Deposits at Los Pelambres, Central Chile
Protracted Magmatic-Hydrothermal History of the Río Blanco-Los Bronces District, Central Chile: Development of World’s Greatest Known Concentration of Copper
Geology of the Bingham Canyon Porphyry Cu-Mo-Au Deposit, Utah
Geology and Exploration Progress at the Resolution Porphyry Cu-Mo Deposit, Arizona
Molybdenum (Mo) is a transition metal with an atomic number of 42 and a relative atomic mass of 95.95. Important isotopes are 95Mo, 96Mo, and 98Mo. Molybdenum has a high melting point of 2623 C and one of the lowest coefficients of thermal expansion among commercially used metals. It readily forms hard, stable carbides in alloys and is widely used in steel alloys, including high-strength alloys and superalloys. Molybdenum was discovered in 1781 by Peter Jacob Hjelm and the name is from the Greek “molybdos,” which means “lead,” because it was often confused
with lead. Details on the chemistry and uses of molybdenum can be found at www. rsc.org/periodic-table/element/42/molybdenum.