Provenance and environmental response of terrigenous debris in the southeastern continental shelf of Hainan Island since 7.8 kaBP

ZHANG Yongwei; TIAN Xu; XU Fangjian; CHEN Bo; YE Youquan; FAN Dejiang

doi:10.16562/j.cnki.0256-1492.2022073101

2023 Vol. 43, No. 1

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Article navigation > Marine Geology & Quaternary Geology > 2023 > 43(1): 27-36

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ZHANG Yongwei, TIAN Xu, XU Fangjian, CHEN Bo, YE Youquan, FAN Dejiang. Provenance and environmental response of terrigenous debris in the southeastern continental shelf of Hainan Island since 7.8 kaBP[J]. Marine Geology & Quaternary Geology, 2023, 43(1): 27-36. doi: 10.16562/j.cnki.0256-1492.2022073101

Citation:

ZHANG Yongwei, TIAN Xu, XU Fangjian, CHEN Bo, YE Youquan, FAN Dejiang. Provenance and environmental response of terrigenous debris in the southeastern continental shelf of Hainan Island since 7.8 kaBP[J]. Marine Geology & Quaternary Geology, 2023, 43(1): 27-36. doi: 10.16562/j.cnki.0256-1492.2022073101

Provenance and environmental response of terrigenous debris in the southeastern continental shelf of Hainan Island since 7.8 kaBP

1.
School of Geosciences, China University of Petroleum (Huadong), Qindao 266580, China
2.
Qingdao Marine Comprehensive Proving Ground Co., Ltd, Qingdao 266200, China
3.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
4.
College of Marine Science, Hainan University, Haikou 570228, China
5.
Marine Geological Institute of Hainan Province, Haikou 570206, China
6.
Xiamen Seismic Survey Research Center, Xiamen 361021, China

More Information

Corresponding author: XU Fangjian, xufangjiangg@163.com

Received Date: 31 July 2022

Revised Date: 23 August 2022

Accepted Date: 23 August 2022

Publish Date: 28 February 2023

Abstract

Abstract

Grain-size, bulk Rare Earth Element (REE), and heavy mineral analysis of Core X2 at southeastern Hainan Island were carried out. The provenances of terrigenous clasts and their environmental responses of this study area since 7.8 kaBP were discussed. Two endmembers were identified by grain-size endmember simulation. The EM1 endmember corresponded to the fine-grained material transported by the ocean current system, while the EM2 endmember corresponded to the coarse-grained material input from nearby rivers in Hainan Island; therefore, the two endmembers represented two different transport mechanisms. Results show that since 7.8 kaBP, the provenance of terrigenous detrital of Core X2 was relatively stable, mainly from Hainan Island. After 4 kaBP, the grain size, REE, and heavy mineral characteristic parameters of Core X2 had changed significantly, which has a good correspondence to the intensification of El Nino and Southern Oscillation (ENSO). It is speculated that the increase of rainfall caused by frequent ENSO events is the main reason for the enhancement of weathering degree in the study area. Compared with the characteristics of REE, the heavy mineral assemblages of Core X2 were more significantly affected by weathering and denudation in the source area. Therefore, study on heavy mineral index is suggested in the future study of environmental evolution.
- continental shelf /
- rare earth element /
- heavy mineral /
- provenance /
- Hainan Island

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References

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