Journal
GEOSCIENCES JOURNAL
Volume 23, Issue 6, Pages 991-1003Publisher
GEOLOGICAL SOCIETY KOREA
DOI: 10.1007/s12303-018-0083-3
Keywords
Taiyuan Formation; carbon isotope; trace element; sedimentary environment
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Funding
- Anhui Provincial Department of Land and Resources Public Welfare Geological Project [2016-g-3-33]
- National Natural Science Foundation of China [41502152]
- Open Projects of Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral [DMSM2018022]
- Anhui Postdoctoral Science Foundation [2015M571940]
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This paper reports systematically the redox sensitive elements (Mo, V, Cd, Cr, U and Th) and carbon and oxygen isotope data of the Late Carboniferous Taiyuan Formation limestone in the Huainan Coalfield in the southern margin of North China Platform, combined with the observation of limestone slice, and tries to explain the sedimentary environment of each layer of limestone. Through the analysis of the diagenesis of each layer of limestone, except for L7 and L12 limestone, the lithogenesis change of the remaining limestone becomes weak, which generally reflects the geochemical characteristics of the paleosol during sedimentation. There are three negative shifts of delta C-13 in Taiyuan Formation limestone, which may be related to the enrichment of redox sensitive elements (Cd, Cr, Mo and V) in limestone. In addition, the value of the above redox sensitive elements shows a negative drift. Combining the low V/Cr ratio and high Th/U ratio, it can be concluded that limestone of the Taiyuan Formation is likely to be deposited under an oxidizing condition.
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