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武功山花岗质穹隆伸展构造平面形态呈近椭圆形,长轴呈近东西向展布。花岗质穹隆伸展构造轴部主要出露中生代花岗岩类,其南北两侧为厚度较大、强烈韧性剪切的花岗质片麻岩,韧性变形时代为晚印支—燕山期;近东西向展布的晚古生代—中生代萍乡、安福盆地分别位于其北、南两侧的山前低地。武功山花岗质穹隆伸展构造具三层结构,由脆性变形带、低绿片岩相变质流变层-角闪岩相糜棱岩带和中生代似斑状花岗岩构成。中生代花岗岩群的东西向分布规律表明其侵入活动受东西向基底断裂的控制。深成花岗岩浆隆升作用是发生强烈动力变质作用的基本热源并影响动力变形作用的主要因素之一。武功山是一个从岩体核部朝南北两侧山外倾斜滑移的伸展构造。
The Wugongshan granite dome extension structure is nearly oval in shape and its long axis is nearly east-west distribution. The granite dome extends mainly from the Mesozoic granitoids, with granitic gneisses of large thickness and strong ductile shear on both the north and south sides. The ductile deformation ages are late Indosinian-Yanshanian period and near east-west The late Paleozoic-Mesozoic Pingxiang and Anfu basins were located in the piedmont lowlands on both the north and south sides. The Wugongshan granite dome extension structure has a three-layer structure composed of brittle deformation zone, low-greenschist facies metamorphic rheological layer-amphibolite facies mylonite belt and Mesozoic plagioclase granite. The east-west distribution of the Mesozoic granitoids indicates that its intrusion activity is controlled by the east-west basement fault. The uplift of the deep granitic magma is one of the main factors that cause the strong heat metamorphism as a basic heat source and affect the dynamic deformation. Wugong Mountain is a stretching structure that runs from the core of the rock mass to the south and north sides of the mountain and slides obliquely outside the mountain.