Добрый день, Коллеги. Важное сообщение, просьба принять участие. Музей Ферсмана ищет помощь для реставрационных работ в помещении. Подробности по ссылке
'What is ore geology?' Unfortunately, it is not possible to give an unequivocal answer to this question if one wishes to go beyond saying that it is a branch of economic geology. The difficulty is that there are a number of distinctly different definitions of ore.
The ore microscope is the basic instrument for the petrographic examination of the large and economically important group of minerals referred to collectively as "ore" or "opaque" minerals. Although neither term is strictly correct (inasmuch as pyrite is opaque but rarely, if ever, constitutes an economically viable ore and sphalerite and cassiterite are important ore minerals but are not opaque), both terms are frequently used synonymously.
Initial discussions regarding the publication of an Ore Mineral Atlas began in 1999. Jason Dunning, then the president of the Mineral Deposits Division and a keen student of ore deposits, thought that there was a need for a simple atlas of ore minerals that would serve as a field reference guide for working geologists and students. Our subsequent years spent in the classroom have reinforced the need for this book. A great debt of thanks is owed to the students who suffered through optical mineralogy labs without this atlas. Our students were fundamental in drawing attention to required contents, in finding mineral specimens, textures or optical properties worthy of photographing, and in some cases researching information on the optical properties or the environment of formation of some minerals.
This book is concerned with the study of ores as rocks—that is, with ore petrology. For much of the last three hundred years—and certainly for much of the twentieth century—most students of ore genesis have regarded the majority of metalliferous deposits as exotic entities, derived from extraneous sources and superimposed on geological situations to which they bore little or no genetic relationship. Almost the only exceptions have been those, such as ores of chromium and nickel, that have apparently formed as part of the igneous rocks that enclose them.
In recent years, alkaline rocks have started to attract intensive attention in both academic and practical fields. These rocks are distinguished mostly by the abundance of alkaline minerals they contain rather than their other components. They generally represent magmatic rocks which contain sodium pyroxene, sodium amphibole or feldspathoid.
This is a monograph on ore deposits with its unique style, and it is obviously different from other books on this subject in that it separates and deals individually with the three sources for hydrothermal deposits, namely, ore source, water source and heat source. Classical magmatic hydrothermalists combine these three sources into one source, arguing that metallogenic elements and hydrothermal solutions are all products of magmatic crystallization and differentiation, and that heat source refers undoubtedly to magma. Such a theory dominated the field of metallogeny for more than half a century, and it is only in the last twenty years that the multi—source hydrothermal metallogeny has gradually emerged and made some progress; people now realize that magma is by no means the only source for hydrothermal deposits.
The recognition and interpretation of ore textures is a difficult task, and the problem is compounded firstly by the relatively low priority given to the subject within most tertiary training institutions, and secondly by the lack of simple well illustrated texts. Special reference needs to be focused upon features which are visible to the eye or observed via a hand lens. These are the most valuable to practicing field geologists. <...>
Integrated Mine Evaluation — Implications for Mine Management
Using Real Options to Incorporate Price Risk into the Valuation of a Multi-Mineral Mine
Roadblocks to the Evaluation of Ore Reserves — The Simulation Overpass and Putting More Geology into Numerical Models of Deposits
Quantification of Risk Using Simulation of the Chain of Mining — Case Study at Escondida Copper, Chile
Integrated Strategy Optimisation for Complex Operations
Simulation of Orebody Geology with Multiple-Point Geostatistics — Application at Yandi Channel Iron Ore Deposit, WA and Implications for Resource Uncertainty
It is often assumed that when China becomes aroused to the need of equipping herself with the tools and technique of America and Europe, there will be a great and rapid industrial and commercial advance comparable with that of England, Germany, and the United States during the last century. Her supposed untold wealth, in uvast resources” of raw materials and man power, when organized, is to produce, we are told, both the fiercest industrial competition the world has ever seen and the greatest potential market. The Industrial Revolution of the West, it is forebodingly asserted, is only the curtain-raiser for the vaster drama of the twentieth century to be played in Asia, where “the stage seems set for catastrophe.”
BERNARD, A. J. : A Review of Processes Leading to the Formation of Mineral Deposits in Sediments ARNOLD, M., MAUCHER, A., SAUPE, F. : Diagenetic Pyrite and Associated Sulphides at the Almad^n Mercury Mine, Spain BARTHOLOME, P. , EVRARD, P., KATEKESHA, F. , LOPEZ-RUIZ, J. , NGONGO, M. : Diagenetic Ore-forming Processes at Kamoto, Katanga, Republic of the Congo BERNARD, A. J. : Metallogenic Processes of Intra-karstic Sedimentation BOGDANOV, Y. V., KUTYREV, ЕЛ. : Classification of Stratified Copper and Lead-Zinc Deposits and the Regularities of Their Distribution. BRONDI, A., CARRARA, C., POLIZZANO, C. : Uranium and Heavy Metals in Permian Sandstones Near Bolzano (Northern Italy)