浙江煤山地区北北东向平移-逆冲断裂特征及变形环境

The features and deformation environment of the north-northeast translation-thrust fault of the Meishan area,Zhejiang province

论述了浙江煤山地区NNE向平移-逆冲断裂的几何学、运动学特征,并用方解石e双晶求得平移-逆冲断裂构造岩形成时的差异应力为100～200MPa,变形温度为150～220℃.扬子地块中生代时存在大型陆内造山事件,其动力来源推测为欧亚大陆与太平洋板块碰撞所产生的巨大挤压-剪切应力.

The present paper reviews the geometrical and kinetic characteristics of the North-Northeast translation-thrust fault of the Meishan area in Zhejiang province. The differential stress for the formation of faulted rocks in the structure obtained by using the twin striation （e） in calcite is 100～140 Mpa; the deformation temperature is 150～220℃. This implies that a large-scale intracontinental orogenic event occurred in the Yangtze massif （plate） in the Mesozoic and it is inferred that its dynamic source was derived from tremendous compression-shear stress produced by the collision between the Eurasia and the Pacific plate.