Discussion on the geological features and sedimentary environment of the Early Carboniferous Jiujialu Formation in Jinsha area of central Guizhou

ZHOU Wu; HAN Xue; LONG Yu; YUE Long; XU Anquan; CHEN Ren

doi:10.16788/j.hddz.32-1865/P.2024.02.004

2024 Vol. 45, No. 2

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Article navigation > East China Geology > 2024 > 45(2): 187-197

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ZHOU Wu, HAN Xue, LONG Yu, YUE Long, XU Anquan, CHEN Ren. 2024. Discussion on the geological features and sedimentary environment of the Early Carboniferous Jiujialu Formation in Jinsha area of central Guizhou. East China Geology, 45(2): 187-197. doi: 10.16788/j.hddz.32-1865/P.2024.02.004

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ZHOU Wu, HAN Xue, LONG Yu, YUE Long, XU Anquan, CHEN Ren. 2024. Discussion on the geological features and sedimentary environment of the Early Carboniferous Jiujialu Formation in Jinsha area of central Guizhou. East China Geology, 45(2): 187-197. doi: 10.16788/j.hddz.32-1865/P.2024.02.004

Discussion on the geological features and sedimentary environment of the Early Carboniferous Jiujialu Formation in Jinsha area of central Guizhou

1. Geological Survey of Guizhou Province, Guiyang 550081, Guizhou, China;
2. Guizhou Center of Coal Mine Geological Engineering Consulting and Geological Environment Monitoring, Guiyang 550081, Guizhou, China

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Corresponding author: CHEN Ren, 565958212@qq.com

Received Date: 08 May 2023

Revised Date: 16 January 2024

Abstract

Abstract

There are abundant bauxite and ceramic-making claystone resources with advantageous and developmental potential in the central area of Guizhou Province. Through the research into the route survey, section measurement and mineral identification on Jiujialu Formation in Datang age of GuiZhou Province, in combination with the analysis of paleoenvironment by finger trace element, the findings firstly illustrate that: the microscope observation on this strata of rocks shows vadose pisolith structure of the aluminous clay rocks, isocrystalline structure of the siliceous rocks and micrite-cluster structure of the ferraginous rocks, suggesting a characteristic of continental sedimentary environment in the study area, meanwhile, the rock type and lithology combination characteristics roughly reflect that the whole area is terrigenous clastic deposition under the settings of the reducing environment and low energy hydrodynamic. Secondly, the Th/U ratio indicates that the clay rocks of Jiujialu Formation in the Datang age are basically formed in a weak oxidation environment, and with the rising ratio during the deposition process, the oxidation gradually strengthened at the same time. Lastly, the values of facies element B, Sr and Ba, and the ratios of B/Ga and Sr/Ba indicate that the clay rocks in the Datang age of Jiujialu Formation underwent several transgressions stages and regressions stages in the Early Carboniferous, and eventually turned into a continental environment. It is inferred that Jiujialu Formation in the Datang age of Early Carboniferous in Jinsha area was located in the epicontinental sea zone. As constrained by the shape and position of the palaeokarst and the direction of seawater influx, Jiujialu Formation in Jinsha area appears complex sedimentary characteristics in different areas.
- Jinsha in central Guizhou /
- Early Carboniferous /
- aluminum-bearing rock series /
- Jiujialu Formation /
- sedimentary environment

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References

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