Call in question and
discussion: Are there sandwiched low-grade
metamorphic slabs within UHP metamorphic rocks in the Dabieshan
terrane |
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作者单位: | ZHAI Mingguo,WANG Qingchen(Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China);JIANG Laili,CONG Bolin(Geological Survey of Anhui, Hefei 230001, China)
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基金项目: | 中国科学院资助项目,国家自然科学基金 |
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摘 要: |
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收稿时间: | 16 April 1999 |
Call in question and discussion: Are there sandwiched low-grade metamorphic slabs within UHP metamorphic rocks in the Dabieshan terrane? |
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Authors: | Mingguo Zhai Laili Jiang Qingchen Wang Bolin Cong |
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Institution: | (1) Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029 Beijing, China;(2) Geological Survey of Anhui, 230001 Hefei, China |
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Abstract: | 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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Keywords: | low grade metamorphic slab mylonites Dabieshan UHP metamorphic terrane |
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