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作为化学地层学的重要分支之一,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,根据锶同位素地层学的基本原理,在对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的引入,可望为我国南方海相三叠系飞仙关组和嘉陵江组的年代地层学对比研究提供重要依据。
As one of the important branches of chemical stratigraphy, strontium isotope stratigraphy has gradually become an effective tool for the research and comparison of global events such as sea level change, orogeny, paleoclimate and paleoenvironment. Based on the basic principle of strontium isotope stratigraphy, Based on the sedimentary rock composition, chemical composition analysis and seawater representative assessment in the same period, the samples of 6 carbonate samples near the Lower Triassic Feixianguan Formation-Jialingjiang Formation in the Huayingshan area of eastern Sichuan Province Strontium isotope composition. The results show that the strontium isotope composition near the boundary is basically the same as the strontium isotope composition data of the previous Triassic marine water. The introduction of strontium isotope stratigraphy is expected to provide an important basis for the comparative study of the stratigraphy of the Feixianguan Formation and the Jialingjiang Formation in the Triassic marine systems of the southern China.