P588.121 P597
国家自然科学基金(编号 49290102)
本文对东秦岭造山带内２７个花岗岩类央体４８件长石样品进行了铅同位素成分的测定，结果表明，本区的南秦岭不同时代花岗岩类以贫铀铅和钍铅为特征，具有明显的铅同位素块体效应，反映它们属地同一个铅同位素构造－地球化学省；而本区的北秦岭区岗岩类从晚元古代到早古生长，长石铅同位素组成以富铀铅和钍铅的为特征，但从晚古生长开始，花岗岩类长石铅同位素组成明显发生变化，以贫铀铅和钍铅为特征，反映晚古生长及其后形成花岗质
This paper reports 48 feldspar Pb isotope analyses from 27 granitic intrusions, which formed from the Late-Proterozoic to Mesozoic within the Eastern Qinling oregenic belt. It is found that the granitic rocks of South Qinling exhibit a strong lead-isotope
张宏飞 张本仁.1997.东秦岭造山带花岗岩类长石铅同位素组成及其构造学意义[J].地质学报,71(2).
Zhang Hongfei, Zhang Benren, Zhao Zhidan, Luo Tingchuan, Chen Yuelong.1997. FELDSPAR LEAD ISOTOPIC COMPOSITIONS OF GRANITOIDS FROM THE EASTERN QINLING OROGENIC BELT AND THEIR TECTONIC SIGNIFICANCE[J]. Acta Geologica Sinica,71(2).
