Permian Alkaline Granites in Central Inner Mongolia and Their Geodynamic Significance1
作者:
Hong Dawei,
Huang Huaizeng,
Xiao Yïjun,
Xu Haiming,
Jin Manyuan,
期刊:
Acta Geologica Sinica ‐ English Edition
(WILEY Available online 1995)
卷期:
Volume 8,
issue 1
页码: 27-39
ISSN:1000-9515
年代: 1995
DOI:10.1111/j.1755-6724.1995.mp8001003.x
出版商: Geological Publishing House
关键词: alkaline granite;geodynamics;Inner Mongolia
数据来源: WILEY
摘要:
AbstractAlkaline granites (Rb‐Sr ages 276‐286 Ma) occurring in the Bayan U1‐East Ujimqin belt at the southern margin of the Siberian plate originated in a tensional tectonic environment about 60 Ma earlier than the Late Devonian to Early Carboniferous collision between the Siberian and Sino‐Korean plates. They belong to post‐orogenic A ‐ type granites and may be used as an indicator of the end of the orogeny. At the northern margin of the Sino‐Korean plate, however, only late‐orogenic calc‐alkaline granites occurred during the late Caboniferous‐Permian, and alkaline syenites did not appear until the Late Triassic. The asymmetric magmatism at the margins of the two neighbouring plates might be controlled by the differences in size and mas
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