摘要
塔里木盆地西北缘阿克苏肖尔布拉克震旦系剖面发育一套基性火成岩,累计厚度超过100 m,其岩相学特征和形成时代存在争议。综合野外考察、镜下特征和K-Ar法年龄测试,确定这是一套顺层侵入的浅成辉绿岩,其K-Ar法测试年龄为452.56×106a±17.53×106a,侵位时代相当于中-晚奥陶世。
A suit of basic igneous rocks with accumulating thickness over 100 m developed in the Upper Sinian profile in Xiaoerbulake of Akesu, northwestern margin of Tarim basin. Nowadays, the lithofacies and forming age of them are still controversial. Based on field investigation, identification under microscope and K-Ar isotopic dating, it is confirmed they are a suit of diabases intruded along the bedding and have a K-Ar age of 452.56×10^6a±17.53×10^6a. The emplacement age corresponds to the Middle-Late Ordovician.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2009年第1期47-48,共2页
Xinjiang Petroleum Geology
