Cretaceous magmatism and lithospheric extension in Southeast China

被引：937

作者：

Li, XH ^{[1
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China

来源：

JOURNAL OF ASIAN EARTH SCIENCES | 2000年 / 18卷 / 03期

关键词：

D O I：

10.1016/S1367-9120(99)00060-7

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A new compilation of reliable isotope age data indicates that Cretaceous magmatism in SE China occurred in four major episodes during 136-146 Ma, 122-129 Ma, 101-109 Ma and 87-97 Ma. A-type granitic and within-plate basaltic magmatism from 140-90 Ma suggests a dominant extensional environment in the region. Voluminous coeval high-K calc-alkaline rocks, which have geochemical features similar to those formed in continental back-are and post-collision extension settings, are interpreted to have been generated in response to lithospheric extension. Cretaceous magmatism, NNE-trending wrench faulting and formation of extensional basin systems favour an extensional tectonic regime in SE China at that time, which was probably similar to present-day Basin and Range Province in the western US. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：293 / 305

页数：13

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