武当山地块基性岩墙群地球化学研究及其大地构造意义  

Geochemistry of basic dykes in Wudangshan blockand their tectonic significance

作　　者：张成立[1] 周鼎武[1] 刘颖字 

机构地区：[1]西北大学地质系

出　　处：《地球化学》1999年第2期126-135,共10页Geochimica

基　　金：国家自然科学基金

摘　　要：武当山地块基性岩墙群的地球化学特征表明，它们为具大陆拉斑玄武岩特征的大陆板内岩浆侵入的产物，是古陆块裂解并保存在造山带内基底岩块中的重要证据，这表明南秦岭和扬子板块曾存在晋宁期固结的统一古陆块，该古陆块在新元古代早期发生了一次重要的裂解作用。There are a lot of Neo-proterozoic basic dykes in Wudangshan block. The geochemicalfeatures of these basic dykes show that they were the products of intmsion of the continentalwithin-plate magma characterized by continental tholeiitic basalts into the continental plate,which is a very important evidence for the rifting of ancient continental block. Therefore, therewas an ancient continental block in South Qinling and Yangtze area in Jinning period, where animportant rifting occurred in early Neo-proterozoic.

关 键 词：基性岩墙 地球化学 古陆块 武当山块 大地构造 

分 类 号：P584[天文地球—岩石学] P591[天文地球—地质学]