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Author: David London
Publisher:
ISBN:
Category : Pegmatites
Languages : en
Pages : 382
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Book Description
Accompanying CD-ROM contains all illustrations of volume and PDF of chapters of "Graranitic pegmatites, short course handbook 7" published in 1982, edited by Petr Černý, P.
Author: David London
Publisher:
ISBN:
Category : Pegmatites
Languages : en
Pages : 382
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Book Description
Accompanying CD-ROM contains all illustrations of volume and PDF of chapters of "Graranitic pegmatites, short course handbook 7" published in 1982, edited by Petr Černý, P.
Author: Edson Sunderland Bastin
Publisher:
ISBN:
Category : Gems
Languages : en
Pages : 734
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Book Description
Author: William Roberts Thurston
Publisher:
ISBN:
Category : Borings
Languages : en
Pages : 274
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Book Description
Author: Harald G. Dill
Publisher: Springer
ISBN: 3319188062
Category : Science
Languages : en
Pages : 488
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Book Description
This book will broaden readers’ understanding of pegmatites in a special geodynamic setting, dealing with the emplacement of the Hagendorf-Pleystein Pegmatite Province (HPPP) in the Central European Variscides. This treatise illustrates the complex processes leading to the formation and partial destruction of the pegmatites, documenting the geochronological, chemical, mineralogical, geological and geomorphological / sedimentological data set. The book starts with a detailed account of the economic geology of the various pegmatites, explaining why these deposits are a major resource of ceramic raw materials. In its concluding section, a model of the pegmatite evolution in an ensialic orogen provides meaningful insights into the genetic aspects of pegmatite generation. The Late Paleozoic rare-element pegmatites of the HPPP, Oberpfalz-SE, Germany, rank among the largest concentrations in Europe. The biggest pegmatite of this mining district totals 4.4 million tons of ore (Hagendorf-South). The mining history of the HPPP is restricted to the 20th century, when local entrepreneurs started mining operations in search of ceramic raw materials, feldspar and quartz. Today the “Silbergrube Aplite” is still worked for feldspar. The traditional mining of pegmatitic and aplitic rocks in Central Europe, such as the Bohemian Massif, which is shared by Germany, the Czech Republic, Poland and Austria, has been focused on these industrial minerals. In addition to these major commodities, lithium was mined for a period of time. But even today many of these pegmatites of calc-alkaline affiliation have not lost their appeal to mineralogists and mineral enthusiasts for their wealth of minerals that contain P, Nb, Ta, Li, Be, B, U, Th, Sc, Ti and Sn. The most favorable crustal section to bring about pegmatitic rocks of this type, encompassing pegmatoids, metapegmatites, reactivated pseudopegmatites and pegmatites sensu stricto is the ensialic orogen, exemplified by the Variscan (Hercynian) Orogen, which geodynamically connects the Paleozoic pegmatite provinces in North America and Europe. The geological history of the HPPP, however, goes much further than the Carboniferous-Permian magmatic activity, when the last structural disturbances of the Variscan orogeny affected the NE-Bavarian Basement between 450 and 330 Ma. During this time mafic magmatic rocks together with calcareous and arenaceous sediments were converted into paragneisses, calcsilicate rocks, and amphibolites. It is the period of time when tectonic shortening led to over thrusting and when the emplacement of nappes and the architectural elements of the ensialic orogen began taking shape. During the Late Permian, the Mesozoic and the Cenozoic, the HPPP did not lie idle in geological terms; hypogene and supergene alteration continued and found its most recent expression in alluvial-fluvial “nigrine” placer deposits, which resulted from the unroofing of the pegmatites and aplites in the HPPP and can be used even outside HPPP as an ore guide to pegmatites.
Author: Russell R. McLellan
Publisher:
ISBN:
Category : Pegmatites
Languages : en
Pages : 30
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Book Description
Author: Thomas Dittrich
Publisher: Springer
ISBN: 3030109437
Category : Science
Languages : en
Pages : 125
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Book Description
Lithium-cesium-tantalum (LCT) pegmatites are important resources for rare metals. For Cs, only the LCT pegmatites with the zeolite group mineral pollucite at Bikita (Zimbabwe Craton) and Tanco (Superior Province Craton) are of commercial importance. Common characteristics of world-class LCT pegmatite deposits include their Meso- to Neoarchean age and geological setting within greenstone belt lithologies on Archean Cratons. This study presents the first coherent and comparative scientific investigation of five major LCT pegmatite systems from the Yilgarn, Pilbara and Zimbabwe Craton. For the evaluation of their Cs potential and of the genetic concepts of pollucite formation, the pegmatites from Wodgina, Londonderry, Mount Deans and Cattlin Creek were compared to the Bikita pollucite mineralization. The integration of the new data (e.g., geochronological and radiogenic isotope data) into the complex geological framework: 1) enhances our knowledge of the formation of LCT pegmatite systems, and 2) will contribute to the further exploration of additional world-class LCT pegmatite deposits, which 3) may host massive pollucite mineralisations.
Author: Vandall T. King
Publisher: Schiffer Pub Limited
ISBN: 9780764335785
Category : Science
Languages : en
Pages : 94
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Book Description
Granite pegmatite crystals have long been admired by gem and mineral collectors as a source of fine specimens and gem materials. Pegmatites can host important deposits of ore minerals and industrial commodities, such as feldspar and mica. Their physical and chemical complexity presents daunting challenges to researchers who seek to better understand their nature and origins. With 209 stunning color photos and clear, authoritative text, this book provides a thorough discussion. Chapters cover pegmatite forms and distributions, interior structures, crystal, mineral, and gem pockets, and references for further study. Examples are from North America as well as worldwide.
Author: P.C. Rao & D.B. Rao
Publisher: Discovery Publishing House
ISBN: 9788171413133
Category :
Languages : en
Pages : 330
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Book Description
Contents: Introduction, Origin of the Earth, Age of the Earth, Interior of the Earth, Interior of the Earth, The Continents and Mountains, Isostasy, Theory of Plate Tectonics, Evolution of Landforms, Volcanoes, Earthquakes, Weathering, Soils, The Study of Rocks, Mineralogy, Structural Geology.
Author: Paul McIntosh Tyler
Publisher:
ISBN:
Category : Pegmatites
Languages : en
Pages : 68
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Book Description
Author: Kirtley Fletcher Mather
Publisher: Harvard University Press
ISBN: 9780674822757
Category : Science
Languages : en
Pages : 462
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Book Description
Here, find source literature for the most important contributions to the remarkable recent expansion of geological knowledge. Excerpted are 65 articles on topics including the constitution of Earth's interior, earthquakes, radioactive timekeepers, submarine features and deep-sea cores, entrapment of petroleum, and crystal structure.
