“S”-SHAPED SHEAR FOLDS AND ORGANIZATION OF DUCTILE SHEAR ZONES IN THE EASTERN SECTOR OF THE SOUTHERN MARGIN OF THE YANGTZE BLOCK
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摘要: 扬子陆块南缘东段的中元古界诸家群浅变质岩系中发育一系列“Ｓ”形剪切褶皱，它们是由Ｚ形褶皱发展而成的反转剪切褶皱，且伴随着雁行状、网结状、平行带状剪切带阵列的形成。它们的生成演化过程反映了加里东期扬子陆块与南华陆块碰撞呈右行走滑对接。Abstract: In the low-grade metamorphic rock series of the Middle Proterozoic Zhujia Group in theeastern sector of the southern margin of the Yangtze biock, there are developed a series of“s”-shaped shear folds,accompanied by the organization of en-echelon,reticular and parallelshear zones. Their formation and evolution process indicate that the collision of the Caledo-nian Yangtze block and Nanhua block resulted in their dextral strike-slip and assembling.
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