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地球科学与环境学报
JOURNAL OF EARTH SCIENCES AND ENVIRONMENT
2007 Vol.29 No.2 P.126-129

数字化期刊

四川西部西康群新都桥组碳酸盐岩的锶同位素特征

曾宜君  黄思静  易同富  郝雪峰  熊昌利  胡作维 

摘 要:四川西部松潘-甘孜地区广泛分布一套三叠系黑色砂板岩层系,由于其岩性单调、古生物化石贫乏,给该区地层划分、对比带来极大困难.因此,从锶同位素地层学基本原理出发,对甘孜北部西康群新都桥组中薄层状灰岩样品进行了锶同位素组成测定.结果表明,6件样品的N(87 Sr)/N(86 Sr)分别为0.708 688、0.708 659、0.708 907、0.708 223、0.708 341、0.708 266,平均为0.708 514.表明该地层的碳酸盐岩样品可能遭受了不同程度的成岩蚀变,多数样品的锶同位素组成偏离同时代的全球海水锶同位素组成.
关键词:四川西部;三叠系;西康群;锶同位素;地层学
分类号:P53  文献标识码:A

文章编号:1672-6561(2007)02-0126-04

Sr Isotopic Characteristics of Carbonate Rocks in Xinduqiao Formation of Xikang Group, Western Sichuan, China

ZENG Yi-jun  HUANG Si-jing  YI Tong-fu  HAO Xue-feng  XIONG Chang-li  HU Zuo-wei 

基金项目:国家自然科学基金项目(40472068);教育部博士点基金项目(20050616005);中国地质调查项目(200313000026)
作者简介:曾宜君(1961-),男,四川自贡人,教授级高级工程师,博士研究生,从事区域地质及环境地质研究.E-mail:hsj@cdut.edu.cn
作者单位:曾宜君(成都理工大学油气藏地质及开发工程国家重点实验室,四川成都,610059;四川省地质调查院,四川成都,610081) 
     黄思静(成都理工大学油气藏地质及开发工程国家重点实验室,四川成都,610059) 
     易同富(四川省地质调查院,四川成都,610081) 
     郝雪峰(四川省地质调查院,四川成都,610081) 
     熊昌利(四川省地质调查院,四川成都,610081) 
     胡作维(成都理工大学油气藏地质及开发工程国家重点实验室,四川成都,610059) 

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收稿日期:2006年8月3日

出版日期:2007年6月30日

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