钱塘—钦防古板块结合带及其地质意义

作为扬子、华夏古板块的结合带 ,奠基于四堡—晋宁期形成的陆间造山带 ,表现出有别于两翼而独特的地球物理、地质构造特征。其发展演化主要是伴随华南板块的形成过程 ,历史比较复杂。由于活动性较大、多期次裂谷、造山作用和多期岩浆活动 ,使结合带成为一条深源岩浆活动带。结合带的构造—岩浆—成矿基本特点表明 ,燕山期的成矿作用具“成因多类型 ,定位多部位”特点 ,是一条潜在的巨大弧型斑岩成矿带。

Qiantang-Qingfang Old Plate JunctionZone and Its Geological Significance

As the junction zone of Yangtze and Huaxia old plates,the intercontinentai orogenic belt formed during Jinning Period in Sibao shows peculiar geophysical and tectonic features,Which are different from those of the two sides.It was developed and evolved along with the formation of Huanan Plate,so is complicated in history,Frequent achivities, rifts,orogenic and magmatic events turned this junction zone into an active belt of plutonic magma. The structure,magma and basic mineralization features of the junction zone show that the mineralization in Yanshanian Period had the features of multi-types of genesis and multi-sites of location.It is a potential mineralization belt for arcuate porphyry.