川东下三叠统飞仙关组—嘉陵江组界线附近的锶同位素组成
STRONTIUM ISOTOPIC CHARACTERISTIC NEAR THE FEIXIANGUAN - JIALINGJIANG FORMATION BOUNDARY FROM LOWER TRIASSIC SECTION IN EASTERN SICHUAN
近年，锶同位素地层学已经逐步成为全球海平面变化、造山运动、古气候和古环境等全球事件研究和对比的有效工具，成为新兴的化学地层学的重要分支之一。本文根据锶同位素地层学的基本原理，在对这些样品进行沉积岩组构、化学成分分析和对同期海水代表性评估的基础上，测试了四川东部华蓥山地区下三叠统飞仙关组—嘉陵江组界线附近6个碳酸盐岩样品的锶同位素组成。结果表明，该界线附近的锶同位素组成与前人公布的早三叠世同期海水的锶同位素组成数据基本一致。锶同位素地层学研究方法的引入，将为今后上扬子地台三叠系的化学地层学和年代地层学对比研究提供一些有益的思路和参考。
Strontium isotope stratigraphy (SIS) is a important part of the chemical stratigraphy in the recent years, which has became progressively a efficient method for global event research and correlation, for example, global sea level, orogeny, paleoclimate and paleoenvironment. In this paper, based on the fundamental principle of strontium isotope stratigraphy, analyses of rock fabric, chemical composition and representation for coeval seawater, 87Sr/86Sr ratios of 6 carbonate rock samples from the Feixianguan - Jialingjiang Formation boundary section of the Lower Triassic in the Eastern Sichuan were measured. This result is consistent with 87Sr/86Sr ratios of the Lower Triassic coeval seawater which data were published previously. Thus the introduce of Strontium isotope stratigraphy will provide a useful method for the chemical stratigraphy or chronostratigraphy research of Upper Yangtze platform.
胡作维、王庆东、郜晓勇、黄思静、王春梅
地质学
下三叠统，飞仙关组，嘉陵江组，锶同位素地层学，四川东部
Lower Triassic Feixianguan Formation Jialingjiang Formation Strontium Isotope Stratigraphy Eastern Sichuan
胡作维,王庆东,郜晓勇,黄思静,王春梅.川东下三叠统飞仙关组—嘉陵江组界线附近的锶同位素组成[EB/OL].(2008-05-06)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200805-140.点此复制
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