气候变化领域集成服务门户(CCPortal): Mobility of rhenium and selenium during chemical weathering and their implication for petrogenic organic carbon oxidation

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DOI	10.1007/s11430-023-1244-5
	Mobility of rhenium and selenium during chemical weathering and their implication for petrogenic organic carbon oxidation
	Zhang, Yuhong; Wang, Jin; Qu, Yuanxin; Zhu, Chao; Jin, Zhangdong
发表日期	2024
ISSN	1674-7313
EISSN	1869-1897
起始页码	67
结束页码	3
卷号	67 期号:3
英文摘要	The oxidative weathering of petrogenic organic carbon (OCpetro) is an important source of carbon dioxide (CO2) into the atmosphere on geological timescales and significantly influences the carbon cycle and global climate change. However, at present, a robust proxy to assess OCpetro oxidation is lacking. Riverine rhenium (Re) has emerged as a potential proxy to trace OCpetro oxidation, but little is known about Re sources and its relationship with OCpetro oxidation. To better understand the robustness of this proxy, we analyzed a shale weathering profile from the early Cambrian Shuijingtuo Formation in Chengkou County, Chongqing City, to address the mobility of Re and selenium (Se) and their relationship with the oxidation of OCpetro by analyses of the elemental variation and sequential extraction. The results showed that the chemical index of alteration (CIA) increases from the fresh bedrock to the weathered sections, indicating enhanced weathering intensity. Based on the sequential extraction and mass transfer coefficients (tau), Re and Se mainly exist in the organic phase of shale and are paired lost with OCpetro during weathering, with no obvious correlation with sulfide minerals. Furthermore, the different proportions of Re and Se loss with OCpetro loss can be attributed to their different geochemical behaviors during weathering. Our study supports Re as a robust proxy to trace OCpetro oxidation, whereas Se is the potential one. In the future, combined studies on various sedimentary rock profiles with catchment basins are needed to determine the sources of riverine Re and Se and their relationships with OCpetro oxidation.
英文关键词	Rhenium and selenium; Shale; Mobility; OCpetro; Chemical weathering
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001171431700001
来源期刊	SCIENCE CHINA-EARTH SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300503
作者单位	Chinese Academy of Sciences; Institute of Earth Environment, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Xi'an Jiaotong University
推荐引用方式 GB/T 7714	Zhang, Yuhong,Wang, Jin,Qu, Yuanxin,et al. Mobility of rhenium and selenium during chemical weathering and their implication for petrogenic organic carbon oxidation[J],2024,67(3).
APA	Zhang, Yuhong,Wang, Jin,Qu, Yuanxin,Zhu, Chao,&Jin, Zhangdong.(2024).Mobility of rhenium and selenium during chemical weathering and their implication for petrogenic organic carbon oxidation.SCIENCE CHINA-EARTH SCIENCES,67(3).
MLA	Zhang, Yuhong,et al."Mobility of rhenium and selenium during chemical weathering and their implication for petrogenic organic carbon oxidation".SCIENCE CHINA-EARTH SCIENCES 67.3(2024).