Geochemical Analysis of Dolomite in the Fourth Member of the Upper Sinian Dengying Formation, Northern Sichuan Basin, China.

The results show that (1) during the deposition period of the fourth member of the Dengying Formation, the water body showed a trend from shallow to deep and then steadily to shallow, which was in a shallow freshwater reducing environment and had a warm and humid paleoclimate environment; (2) the dolomite of the fourth member of Dengying Formation in northern Sichuan is less affected by terrigenous materials.

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