| 贵州惠水石炭纪锶同位素曲线及年代地层对比 |
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| 引用本文： | 石 和 黄思静,赵鹏肖.贵州惠水石炭纪锶同位素曲线及年代地层对比[J].中国地质,2003,30(2):138-143. |
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| 作者姓名： | 石 和 黄思静 赵鹏肖 |
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| 作者单位： | 1. 成都理工大学地球科学学院,四川,成都,610059
2. 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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| 基金项目： | 国家自然科学基金项目(49972044) |
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| 摘 要： | 本文简要介绍了锶同位素地层学的基本原理，根据贵州惠水地区石炭系剖面中的19个锶同位素测试数据建立了此锶面的锯同位素演化曲线并与R．E．Denison的北美同时代铅同位素曲线进行了对比。两条锶同位素演化曲线的极大相似性，证实了地质历史上古海洋中的铅同位素组成具有全球一致的演化规律，是进行全球年代地层对比的可靠工具。根据对比，笔者讨论了石炭纪的全球性海平面变化和惠水石炭系剖面的年代地层划分对比，认为下石炭统与上石炭统的界线大致位于摆佐组的近底部，证实了石炭一二叠系的界线位于马平组内部。
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| 关 键 词： | 贵州 石炭纪 锶同位素 惠水地区 铅同位素 古海洋 二叠系 年代地层 |
| 文章编号： | 1000-3657(2003)02-0138-06 |
Strontium isotopic curve of the Carboniferous in Huishui, Guizhou, and chronostratigraphic correlation |
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| SHI He,HUANG Si-jing,ZHAO Peng-xiao.Strontium isotopic curve of the Carboniferous in Huishui, Guizhou, and chronostratigraphic correlation[J].Chinese Geology,2003,30(2):138-143. |
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| Authors: | SHI He HUANG Si-jing ZHAO Peng-xiao |
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| Institution: | SHIHe1,HUANGSi-jing2,ZHAOPeng-xiao1 |
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| Abstract: | The fundamental principle of Sr isotopic stratigraphy is introduced briefl y in the paper.An evolutionary curve of the Sr isotopic composition of the Carbo niferous has been constructed based on19unaltered carbonate samples collected fr om the Hiushui section,Guizhou.It was correlated with a contemporaneous Sr isoto pe curve of North America constructed by R.E.Denison.The very close similarity b etween the two curves supports the globally consistent evolutionary feature of t he Sr isotopic composition of ancient seawater during the geologic his-tory.So the curve is a reliable tool for the global chronostratigraphic corr elation.This paper discusses the global sea-level changes during the Carbonifero us and the chronostratigraphic division and correlation of the Huishui Carbonife rous section.The authors suggest that the Lower-Upper Carboniferous boundary is broadly located near the base of the Bazuo Formation and that the Carboniferous-Permian boundary lies inside the Maping For-mation. |
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| Keywords: | strontium isotopic stratigraphg Huishui Guizhou Carboniferous chronostratigraphy |
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