华北地台南缘晋宁运动的初步研究

详细信息

THE JINNING MOVEMENT OF THE SOUTHERN MARGIN OF THE NORTH CHINA PLATFORM

摘要: 依据大量地质事实证明华北地台南缘存在着晋宁运动的广泛影响。晋宁期强烈的构造—花岗岩浆活动与秦岭—大别造山带的早期构造演化和华中高压变质带的形成有着密切的关系。初步确定该区晋宁运动的时限为９５０—７００Ｍａ，较华南地区晚５０—１００Ｍａ。

Abstract: Based on a great mass of geological facts, the authors have verified that the Jinningmovement extensively affected the southern margin of the North China platform. The intensesyn-tectonic granitic magmatism was intimately associated with the early tectonic evolutionof the Qinling-Dabie orogenic belt and the formation of the Central China high-pressuremetamorphic belt. According to the isotope dating of magmatic activities and sedimentarycovers,it is determined approximately that the time interval of the Jinning movement was950-700 Ma in the area, 50-100 Ma later than that in South China.