Acta scientiarum naturalium Universitatis Pekinensis
TANG Xianmei, LIU Shuwen
The Archean metamorphic rocks in the northern Taihang Mountains can be divided into Fuping Gneiss Complex (FPGC), Nanying Gneiss (NYG) and Wanzi Layering Series (WZLS) from bottom to top. A large low-angle-extension deformation belt, along which NYG was emplaced, was found between FPGC and WZLS. A series of ductile deformation structures, including a-type and sheath folds, mineral stretching lineations and augen structures, are found in the main deformation belt, where rocks have been foliated heavily. Shear criteria indicate a top-to-the-west sense of shear. A series of small shear zones, which are parallel to the main deformation belt, are formed in the foot wall, while in the hanging wall ductile-brittle normal faults are popular. The PT-paths of the two walls are clockwise, implying that the crust evoluted from early thicking by folding through thinning by stretching and finally being denuded by lifting.
TANG Xianmei,LIU Shuwen. An Initial Research on the Extension Deformation Belt in the Archean Metamorphic Rocks in the Northern Taihang Mountains[J].Acta scientiarum naturalium Universitatis Pekinensis, 1997, 33(4): 447-455.
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