塔里木盆地中部塔参1井花岗闪长岩的锆石SHRIMP U-Pb年龄  

Zircon SHRIMP U-Pb age of granodiorite of the Tacan 1 well in the central Tarim basin,China

作　　者：邬光辉[1,2] 张承泽[2] 汪海[2] 刘玉魁[2] 李建军[2] 

机构地区：[1]中国石油勘探开发研究院塔里木分院,北京100083 [2]中国石油塔里木油田勘探开发研究院,新疆库尔勒841000

出　　处：《地质通报》2009年第5期568-571,共4页Geological Bulletin of China

基　　金："十五"国家重点科技攻关项目(编号:2004BA616A02);中国石油勘探开发研究院中青年创新基金项目资助

摘　　要：前人对塔里木盆地中部前寒武纪地层的时代存在不同认识。为获得确切的同位素年龄数据,对塔中隆起塔参1井前寒武纪基底花岗闪长岩进行了锆石SHRIMPU-Pb年龄测定,结果为757.4Ma±6.2Ma,从而证实其为南华纪中期岩浆活动的产物。该成果为进一步研究塔里木盆地前寒武纪基底提供了新的实际资料。There are many discrepancies about the age of pre-Cambrian strata in the central Tarim basin. In order to get the correct isotopic age, SHRIMP U-Pb zircon dating of pre-Cambriam basement granodiorite from Tacan 1 well in the central uplift zone of the Tarim basin was carried out, yielding an age of 757.4±6.2 Ma. This could be the evidence that it is the result of the magmatic activity during middle Nanhuan Epoch. These results provide practical information for further detailed and systematic study of the pre Cambrian basement of Tarim basin.

关 键 词：塔里木板块 基底 新元古代 锆石SHRIMP U-PB年龄 花岗闪长岩 

分 类 号：P597.3[天文地球—地球化学] P534.3[天文地球—地质学]