Call in question and discussion: Are there sandwiched low-grade metamorphic slabs within UHP metamorphic rocks in the Dabieshan terrane?

被引:19
|
作者
Zhai, MG [1 ]
Jiang, LL
Wang, QC
Cong, BL
机构
[1] Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
[2] Geol Survey Anhui, Hefei 230001, Peoples R China
来源
CHINESE SCIENCE BULLETIN | 2000年 / 45卷 / 02期
基金
中国国家自然科学基金;
关键词
low grade metamorphic slab; mylonites; Dabieshan UHP metamorphic terrane;
D O I
10.1007/BF02884669
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Some geologists reported their discovery of sandwiched low-grade metamorphic slabs within UHP metamorphic Complexes in Changpu, Yuexi County, Anhui Province. They also suggested that some coesite-bearing eclogites are igneous veins, which intruded low-grade metamorphic slabs and other related rocks. Moreover they further called in question to UHP metamorphic process and continental collision tectonism in the Dabieshan terrane. Based on our recent study, so-called low-grade metamorphic slabs are strongly deformed fabric, fine-grained and tectonic recrystallized mylonites and tectonites. Their protolith rocks are garnet-bearing orthogneiss, eclogite and marble, as well as a few amounts of strongly deformed acid and basic veins. Their metamorphic, geochemical and geochronological characteristics are also identical with UHPM rocks and regional country orthogneisses. Therefore we conclude that there are not low-grade metamorphic slabs sand wiched with UHP metamorphic rocks in the Dabieshan terrane.
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页码:181 / 189
页数:9
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