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Author: D.D. Klemm
Publisher: Springer Science & Business Media
ISBN: 3642668062
Category : Science
Languages : en
Pages : 451
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Book Description
The problem of time-and strata-bound formation of ore deposits has during the past decade become one of the most debated topics in cur rent international discussion. Due to the amazing results of modern mineral exploration and world-wide geophysical research, the mutual relationship between the complex geological history pf a crustal seg ment and the development of distinct metallogenic provinces (ore belts) has received much interest. Reviewing the earth's history in this light one can now recognize metallogenic epochs even of global range which document the existence of world-wide time-bound ore enrich ments. The knowledge of these metallogenetic processes has been growing step by step for several decades. It began with simple observations and sceptic interpretations, which at first threw heretical spot lights on to the edifices of the prevailing theories on granitic differentiation as the favoured source of ore deposits. It was obvious that the new ideas at first referred to ore enrichments in sedimentary sequences, nowadays summarized under the term strata-bound, and mainly interpreted as stratiform or sedimentary ore deposits. Moreover, the modern term "strata-bound" also includes ore mineralizations which are bound to distinct units of layered (intrusive or extrusive) igneous complexes as a general descriptive term without genetical restriction! Albert Maucher is one of the representatives of the initial era who discussed these genetical questions critically in the decade before the 2nd World War.
Author: D.D. Klemm
Publisher: Springer Science & Business Media
ISBN: 3642668062
Category : Science
Languages : en
Pages : 451
Get Book Here
Book Description
The problem of time-and strata-bound formation of ore deposits has during the past decade become one of the most debated topics in cur rent international discussion. Due to the amazing results of modern mineral exploration and world-wide geophysical research, the mutual relationship between the complex geological history pf a crustal seg ment and the development of distinct metallogenic provinces (ore belts) has received much interest. Reviewing the earth's history in this light one can now recognize metallogenic epochs even of global range which document the existence of world-wide time-bound ore enrich ments. The knowledge of these metallogenetic processes has been growing step by step for several decades. It began with simple observations and sceptic interpretations, which at first threw heretical spot lights on to the edifices of the prevailing theories on granitic differentiation as the favoured source of ore deposits. It was obvious that the new ideas at first referred to ore enrichments in sedimentary sequences, nowadays summarized under the term strata-bound, and mainly interpreted as stratiform or sedimentary ore deposits. Moreover, the modern term "strata-bound" also includes ore mineralizations which are bound to distinct units of layered (intrusive or extrusive) igneous complexes as a general descriptive term without genetical restriction! Albert Maucher is one of the representatives of the initial era who discussed these genetical questions critically in the decade before the 2nd World War.
Author: Karl Heinz Wolf
Publisher:
ISBN: 9780444414021
Category : Ore deposits
Languages : en
Pages : 363
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Book Description
Author: Karl H. Wolf
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 672
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Book Description
Author: K. H. Wolf
Publisher:
ISBN: 9780444414076
Category :
Languages : en
Pages : 656
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Book Description
Author: Karl Heinz Wolf
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 0
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Book Description
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: Karl H. Wolf
Publisher:
ISBN: 9780444418234
Category : Ore deposits
Languages : en
Pages : 592
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Book Description
Author: Karl Heinz Wolf
Publisher:
ISBN:
Category : Geology
Languages : en
Pages :
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Author: Karl H. Wolf
Publisher:
ISBN: 9780444425027
Category : Geology
Languages : en
Pages : 529
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Book Description
Author: Karl Heinz Wolf
Publisher:
ISBN: 9780444422484
Category : Geology
Languages : en
Pages : 527
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Book Description