摘要
本文阐述了作者在1：5万区调填图中，从柞水地区商丹断裂带南侧原划泥盆系刘岭群桐峪寺组中解体出前寒武纪中深变质岩系，取得了同位素全岩Sm－Nd年龄平均值2499．83Ma的数据，这对研究秦岭造山带的演化具有重要的地质意义。
According to the regional geological survey (1: 50 000), the middle-bypozonal metamorphic rock series of pre-Cambrian are separated from Tongyusi formation of Liuling group in the primary Devonian, in the sourthern Zhashui-Shangdan fault belt. The isotope age of 2499. 83Ma (average) (Sm-Nd) is obtained, which has an important geological significance in the understanding of the evolution of orogenic belt in Qinling mountain.
出处
《陕西地质》
1998年第2期17-26,共10页
Geology of Shaanxi
关键词
柞水
泥盆系刘岭群
早前寒武纪
中深变质岩系
Zhashui county
Liuling group of Devonian system
early pre-Cambrian
middle-hypozonal metamorphic rock series
