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Author: Southern Rhodesia Geological Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 28
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Book Description
Author: Southern Rhodesia Geological Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 28
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 162
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Author: Zimbabwe Geological Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 110
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Author: Southern Rhodesia. Geological Survey
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 634
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 466
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Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 444
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Author: S.M. Naqvi
Publisher: Elsevier
ISBN: 0080869076
Category : Science
Languages : en
Pages : 687
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Book Description
Since 1964, the time when the Upper Mantle Project was started, the Precambrian continental crust has been studied in considerable detail in many areas. Multidisciplinary studies, using modern tools and techniques have resulted in increasing levels of accuracy. The Precambrian continental crust has been subjected to several thermal events and multiple episodes of deformation. These events have obliterated the scenario produced by early events and present-day efforts are directed towards evaluating the cause-effect processes of each event. How far back the known geological processes of the Phanerozoic can be extended into the Precambrian is one of the main questions. The present volume provides data and interpretations which will help in formulating the answer to some of these questions.The book contains 30 contributions resulting from researches on almost all the important Precambrian terranes.
Author: S. Brooke Norris
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 34
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Author: Bozzano G Luisa
Publisher: Elsevier
ISBN: 0444598952
Category : Nature
Languages : en
Pages : 335
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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: Commission for Technical Co-operation in Africa South of the Sahara
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 220
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