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塔里木盆地二叠纪基性岩带的确定及大地构造意义
引用本文:陈汉林,贾承造.塔里木盆地二叠纪基性岩带的确定及大地构造意义[J].地球化学,1997,26(6):77-87.
作者姓名:陈汉林  贾承造
作者单位:[1]浙江大学地球科学系 [2]塔指地质勘探研究中心
基金项目:国家“八五”科技攻关项目,浙江大学曹光彪高科技发展基金
摘    要:通过野外地质、钻井地质、地球物理和同位素地质的综合调查研究,确定了盆地内部存在一条三叠纪基性岩带。该基性岩带包含有玄武岩、辉绿岩和其他基性侵入岩;它们的同位素年代为(259±09)Ma-(292。0±0.5)Ma。玄武岩、辉绿岩的岩石学、岩石化学和地球化学研究表明,它们表现出典型的板内基性岩的特征。结合盆地内部晚古生代的沉积学特征和周边的大地构造特征,认为该基性岩带是二叠纪裂谷作用的产物。在二叠纪,塔里木盆地处于克拉通内部裂谷环境。

关 键 词:基性岩带  大地构造  盆地  二叠纪

CONFIRMATION OF PERMIAN BASITE ZONE IN TARIM BASIN AND ITS TECTONIC SIGNIFICANCE
Chen Hanlin, Yang Shufeng, Dong Chuanwan,Jia Chengzao , Wei Guoqi, Wang Zhenguo.CONFIRMATION OF PERMIAN BASITE ZONE IN TARIM BASIN AND ITS TECTONIC SIGNIFICANCE[J].Geochimica,1997,26(6):77-87.
Authors:Chen Hanlin  Yang Shufeng  Dong Chuanwan  Jia Chengzao  Wei Guoqi  Wang Zhenguo
Abstract:The Tarim basin is the biggest sedimentary basin in China, and it is also an important area of Petroleum industry in the future. Therefore, it is of great significance.to study the evolution and formation of the basin. Through systematic investigation of field geology, drilling records, geophysics and isotope geology, a Permian basite zone in the basin is confirmed. This zone consists of basalt, diabase and other basic intrusive rock, and the isotopic age is between 259 Ma and 292 Ma. Study of Petrology, Petrochemistry and geochemistry of basalt and diabase indicates that the baslte in this. zone is of typical intraplate. Combining the characteristics of late Paleozoic sedimentation of the basin and tectonic evolution of Peripheral orogenic zones, it is concluded that this zone was the product of the rifting in Permian. Therefore, the Tarim basin was formed in the environment of intracratonic rift valley in Permian.
Keywords:basite zone  tectonic setting  Tarim Basin
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