锶同位素在沉积环境分析方面的应用

doi:10.11743/ogg20030218

Abstract

Abstract:

With indicating significance of geochemical characteristics of Sr isotope in sedimentary environment, characteristics of Sr isotope in Eogene saline deposits in Dongpu depression have been studied. Analysis result indicates that the value of ⁸⁷Sr/⁸⁶Sr are generally higher and exceed that in the sea water,so it is inferred that Dongpu salt lake might have been an inland brine lake,and the Sr isotope in the lake water might have mainly been controlled by the silicon-aluminium rock with high ⁸⁷Sr/⁸⁶Sr(0.720?0.005)value. Variation of Sr isotope curve may reflect the climate change, and the Eogene paleo-climate in Dongpu depression has also been analyzed with this feature.It is preliminarily suggested that the climate might have been semiarid and semihumid from Es₄^up to Es₃^up,and it became more arid from Es₃^up to Es₁.

Key words: Sr isotope, salt lake, sedimentary environment, Dongpu depression

CLC Number:

TE111.3

Shi Zhongsheng, Chen Kaiyuan, He Hujun, Shi Jun, Liu Baojun, Liu Gang. APPLICATION OF SR ISOTOPE TO SEDIMENTARY ENVIRONMENT ANALYSIS[J]. Oil & Gas Geology, 2003, 24(2): 187-190.

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APPLICATION OF SR ISOTOPE TO SEDIMENTARY ENVIRONMENT ANALYSIS

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