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The role of hydrothermal fluids during the crystallization of layered intrusions and the ore deposits they contain has long been debated. This book summarizes the evidence for fluid-crystal-liquid (hydromagmatic) interactions and their importance for the understanding of the formation of platinum-group deposits in layered intrusions. It discusses the composition of igneous fluids in mafic magmatic systems, the generation and movement of these fluids in layered intrusions, their impact in altering the mineralogy and composition of the originally precipitated assemblages, and their role in the transport of the platinum-group elements (PGE). Using examples from the Bushveld complex of South Africa and other intrusions, this book provides a comprehensive overview of the hydromagmatic model for the origin of various features of layered intrusions. It is a useful reference for academic researchers and professional geologists working on economic mineral exploration, layered igneous intrusions, and hydrothermal metallogenesis.

Platinum ores. --- Ore deposits. --- Folds (Geology) --- Hydrothermal deposits. --- Intrusions (Geology)

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Intended as a reference for the academically-oriented geologist as well as the practising economic geologist, this book is concerned with the study of skarn deposits having anomalously high tin or tungsten contents, or both. Unlike many other books on economic geology, both economic W-Sn skarns and non-economic examples are covered, in order to enable the academically-oriented reader to grasp the full range of such deposits, and also to aid the economic geologist in distinguishing between W-Sn skarns having economic potential and those which do not.W-Sn skarns are notoriously complex,

Skarn --- Granite --- Metamorphic rocks --- Tungsten ores --- Tin ores --- Hydrothermal deposits --- Granit --- Roches métamorphiques --- Tungstène --- Gîtes hydrothermaux --- Minerais --- Roches métamorphiques --- Tungstène --- Gîtes hydrothermaux --- Skarn. --- Granite. --- Rocks, Metamorphic. --- Tungsten ores. --- Tin ores. --- Hydrothermal deposits. --- Deposits, Hydrothermal --- Hydrothermal mineral deposits --- Hydrothermalites --- Ore deposits --- Ores --- Rocks, Metamorphic --- Rocks --- Granitic rocks --- Igneous rocks --- ETAIN --- TUNGSTENE --- MATIERES UTILES --- ELEMENTS CHIMIQUES --- GEOLOGIE APPLIQUEE --- GEOGRAPHIE INDUSTRIELLE ET MINIERE --- SYSTEMATIQUE DES RESSOURCES NATURELLES --- GITOLOGIE GENERALE --- MAGMATISME ACIDE --- INTRUSIF --- SKARNS

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Dramatic advances in understanding global tectonics have been made in the last half century and the information and specific data acquired on the floor of the World Ocean by the scientific community probably has exc- ded that available in all previous time. With the benefit of new technology and advanced concepts in the earth sciences extensive exploration of the deep seabed became possible, and has been carried out in many parts of the world. Many features have been recognized and data recorded that are vital for understanding the fundamental processes that shape the earth=s surface and control the habitable environment. The data collected to date on the o- an floor and its physical environment greatly exceeds our understanding and appreciation of their fundamental importance in the earth sciences, and our ability to apply this knowledge effectively in improving our way of life. With his extensive scientific knowledge and unique experience from - ny cruises in association with scientists throughout the world, Dr. Evgeny Gurvich has made an outstanding contribution in acquiring basic data on hydrothermal and sedimentation processes in the ocean, as well as in the synthesis of data and concepts available from cruise reports and an extensive literature.

Marine sediments. --- Hydrothermal deposits. --- Ore deposits. --- Deposits, Ore --- Mines and mineral resources --- Deposits, Hydrothermal --- Hydrothermal mineral deposits --- Hydrothermalites --- Ore deposits --- Bottom deposits (Oceanography) --- Bottom sediments (Oceanography) --- Deep-sea deposits --- Deposits, Deep-sea --- Marine deposits --- Sediments, Marine --- Ocean bottom --- Sedimentation and deposition --- Submarine geology --- Sediments (Geology) --- Oceanography. --- Sedimentology. --- Geochemistry. --- Geology. --- Mineral resources. --- Mineral Resources. --- Deposits, Mineral --- Mineral deposits --- Mineral resources --- Mines and mining --- Mining --- Natural resources --- Geology, Economic --- Minerals --- Geognosy --- Geoscience --- Earth sciences --- Natural history --- Chemical composition of the earth --- Chemical geology --- Geological chemistry --- Geology, Chemical --- Chemistry --- Petrology --- Oceanography, Physical --- Oceanology --- Physical oceanography --- Thalassography --- Marine sciences --- Ocean