Evolution and global correlation for strontium iso

Authors: ZuoWei Hu SiJing Huang HaiRuo Qing QingDong Wang ChunMei Wang XiaoYong Gao

Publish Date: 2008/03/26

Volume: 51, Issue: 4, Pages: 540-549

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Abstract

Strontium isotope stratigraphy SIS has progressively become an efficient chemostratigraphic tool in the research and correlation of global geological events such as global sea level fluctuations orogeny and paleoclimatic and paleoenvironmental changes In this paper 87Sr/86Sr ratios of the Triassic marine carbonate rock samples from Huaying Mountains eastern Sichuan are measured and the corresponding Srisotopic curve is constructed based on the fundamental principle of strontium isotope stratigraphy analysis of rock fabric luminescent intensity chemical composition and representative evaluation for the coeval seawater information The 87Sr/86Sr ratios show a rapid rise from 070721 near the PermianTriassic transition to 070830 at the end of Early Triassic and then they decline rapidly to 070787 in the early Middle Triassic These data are generally coincident with 87Sr/86Sr ratios of coeval seawater from previous papers and the curve is also similar to other previous curves This indicates that the global geological events are the most important controlling factors to the strontium isotope evolution of the global seawater in the Early and Middle Triassic

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