Die geologie van die sisteem Karoo in die gebied Mariental-Asab, Suidwes-Afrika PDF Download
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Author: P. R. De Villiers
Publisher:
ISBN:
Category : Cistecephalus
Languages : en
Pages : 798
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Author: P. R. De Villiers
Publisher:
ISBN:
Category : Cistecephalus
Languages : en
Pages : 798
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Book Description
Author: I.M. Varentsov
Publisher: Springer Science & Business Media
ISBN: 9401721742
Category : Science
Languages : en
Pages : 355
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Book Description
The major part of the world's high grade industrial manganese ore is being mined in supergene deposits. This book represents the first attempt to bring together not only academic but also commercial data on all aspects of the geochemistry of formation of supergene manganese ores. It is a distinctive account of the geology, geochemistry, mineralogy, experimental modelling studies, mechanisms of formation processes and geochemical evolution through geological time of manganese ores for all types of supergene deposits. Special emphasis is placed on the general geochemical model of supergene manganese ore formation, which can be applied in geochemical exploration. Despite the fact that supergene manganese ores have been used by mankind since the early centuries, it is only during the last decade that a comprehensive understanding of the nature of geochemical processes of formation of these deposits has become available and their potential as an economic resource has been recognized against other genetical types of manganese accumulations. Audience: This substantial and comprehensive volume is of interest to economic geologists, mining engineers, geochemists, mineralogists and other specialized geoscientists.
Author: B. Cairncross
Publisher:
ISBN:
Category : Manganese mines and mining
Languages : en
Pages : 262
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Book Description
Author: William Alexander Deer
Publisher: Geological Society of London
ISBN: 9781897799857
Category : Science
Languages : en
Pages : 690
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Book Description
A second edition, in two parts, of volume two of this reference series. This part deals mainly with the pyroxene minerals, but also with pyroxenoids, sapphirine and aenigmatite. The advances in research over the 15 years since the first edition was published are summarized in this text.
Author: J. S. Huebner
Publisher:
ISBN:
Category : Franciscan Complex (Calif.)
Languages : en
Pages : 80
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See journals under US Geological survey. Prof. paper 1502.
Author: J.B. Maynard
Publisher: Springer Science & Business Media
ISBN: 1461394937
Category : Science
Languages : en
Pages : 297
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Book Description
This book is an outgrowth of my interest in the chemistry of sedimentary rocks. In teaching geochemistry, I realized that the best examples for many chemical processes are drawn from the study of ore deposits. Consequently, we initiated a course at The University of Cincinnati entitled "Sedimentary Ore Deposits," which serves as the final quarter course for both our sedimentary petrology and our ore deposits sequence, and this book is based on that teaching experience. Because of my orientation, the treatment given is perhaps more sedimentological than is usually found in books on ore deposits, but I hope that this proves to be an advantage. It will also be obvious that I have drawn heavily on the ideas and techniques of Robert Garrels. A number of people have helped with the creation of this book. I am especially grateful to my students and colleagues at Cincinnati and The Memorial University of Newfoundland for suffering through preliminary versions in my courses. I particularly thank Bill Jenks, Malcolm Annis, and Dave Strong. For help with field work I thank A. Hallam, R. Hiscott, J. Hudson, R. Kepferle, P. O'Kita, A. Robertson, C. Stone, and R. Stevens. I am also deeply indebted to Bob Stevens for many hours of insightful discussion.
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 304
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Author: Bozzano G Luisa
Publisher: Elsevier
ISBN: 0444598952
Category : Nature
Languages : en
Pages : 335
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Book Description
Regional Studies is a collection of papers that deals with strata-bound mineral deposits in the Eastern Alps, in the Canadian Cordillera, in north-central, and southwest England. Other papers describe southern African stratiform ore deposits and the genesis of Irish base-metal deposits. One paper compares the various types of volcanogenic mineral deposits and their depositional environments characterized by distinct assemblages of volcanic rocks, which formed in the Northern Appalachians during certain episodes of the tectonic evolution. The paper notes that the youngest volcanogenic deposits of economic interest are tungsten—molybdenum—tin—bismuth base metal deposits in highly altered rhyolitic sub-volcanic complexes at Mount Pleasant, New Brunswick. Another paper reviews the mineral occurrences in southern Africa that include stratiform, non-magmatic, ore deposits, The paper considers a subdivision of deposits formed from surficial chemical processes during previous (or current) cycles of weathering and erosion. Many ore bodies have a dual origin: for example, the iron in the high-grade hematite deposits is partly syngenetic and partly epigenetic. The paper also illustrates the time-dependence of some stratiform ore deposits in southern Africa in a schematic diagram. Geologists, researchers, or engineers whose works are related with ore deposits and mining will benefit tremendously from the collection.
Author: A.F. Trendall
Publisher: Elsevier
ISBN: 008086905X
Category : Science
Languages : en
Pages : 559
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Book Description
Iron-Formation: Facts and Problems
Author: Geological Survey (South Africa)
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 474
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Book Description
