Mafic-ultramafic intrusions in Beishan and Eastern Tianshan at southern CAOB : petrogenesis, mineralization and tectonic implication
Author(s)
Bibliographic Information
Mafic-ultramafic intrusions in Beishan and Eastern Tianshan at southern CAOB : petrogenesis, mineralization and tectonic implication
(Springer theses : recognizing outstanding Ph. D. research)
Springer, c2014
Available at 1 libraries
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  Iwate
  Miyagi
  Akita
  Yamagata
  Fukushima
  Ibaraki
  Tochigi
  Gunma
  Saitama
  Chiba
  Tokyo
  Kanagawa
  Niigata
  Toyama
  Ishikawa
  Fukui
  Yamanashi
  Nagano
  Gifu
  Shizuoka
  Aichi
  Mie
  Shiga
  Kyoto
  Osaka
  Hyogo
  Nara
  Wakayama
  Tottori
  Shimane
  Okayama
  Hiroshima
  Yamaguchi
  Tokushima
  Kagawa
  Ehime
  Kochi
  Fukuoka
  Saga
  Nagasaki
  Kumamoto
  Oita
  Miyazaki
  Kagoshima
  Okinawa
  Korea
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Note
"Doctoral thesis accepted by Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China."
Includes bibliographical references
Description and Table of Contents
Description
The widespread mafic-ultramafic complexes in the Earth are well-known as their hosting Ni-Cu-PGE ore deposits, and their petrogenesis and mineralization have become hot issues in the geological studies. This thesis comprehensively investigated the petrology, mineralogy, geochemistry and geochronology of several mafic-ultramafic complexes in the Beishan Terrane, southern Central Asian Orogenic Belt aimed at systematically determining the mineralization and petrogenetic processes responsible for the formation of the complexes and placing constraints on the tectonic evolution of the Eastern Tianshan and Beishan, and the Early Permian mantle plume. The thesis identified mineralizing indicators of Ni-Cu sulfide deposits and defined the roles of partial melting, fractional crystallization, crustal assimilation and magma injection. The systematical isotopic compositions revealed the mantle source of the mafic-ultramafic complexes had undergone the subduction-related modifications both from the South Tianshan Ocean and subsequently the Junggar Ocean, and that the complexes were emplaced in the period of 269-285 Ma coeval with the 280 Ma mantle plume event in the Tarim Craton. The results of this thesis provide new insights about the tectonic setting, magma evolution, ore genesis, and exploration implications of the mafic-ultramafic complexes in Central Asian Orogenic Belt. Dr. Benxun Su works at the Institute of Geology and Geophysics, Chinese Academy of Sciences, China.
Table of Contents
Introduction.- Regional Geology.- Analytical Methods.- Petrology and Mineralogy.- Zircon U-Pb Geochronology and Hf-O Isotopes.- Geochemistry.- Petrogenesis.- Mineralization.- Permian Mantle Plume and Paleozoic Tectonic Evolution.- Concluding Remarks.
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