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Enrichment mechanism of selenium in Lujiaping formation in central South Qinling: Controls from mixed sources, sedimentary environment, primary productivity and paleo-climate during Ediacaran to early Cambrian period

文献类型：期刊论文

作者Zhang, Minmin2; Yang, Sujiao1; Zhang, Shixi1; Luo, Kunli2
刊名PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
出版日期2024-08-01
卷号647页码:112256
关键词Selenium enrichment Redox condition Primary productivity Paleo-climate South Qinling Ediacaran to early Cambrian
DOI10.1016/j.palaeo.2024.112256
产权排序1
文献子类Article
英文摘要The Ediacaran to lower Cambrian Lujiaping Formation in South Qinling exhibited extremely high level of Se enrichment, which has provoked extensive concerns since the critical role of Se in paleo-biological evolution and diversification as well as its bidirectional effects on current ecological environment and human health. Because of complex geological setting within South Qinling during the Ediacaran-early Cambrian interval, distribution pattern and mechanism of Se enrichment in Lujiaping Formation have not been fully understood. In this study, therefore, stratigraphic variations of Se concentration and enrichment level together with enrichment mechanism in Lujiaping Formation in the central part of South Qinling were systematically explored. The result showed that, in the whole Lujiaping Formation, Se concentrations varied from 0.19 to 129 mu g/g, with an average of 13.28 mu g/g. According to the enrichment factor, most of samples can be classified as strong enrichment and anomaly levels (EF = 10-1000) which mainly occurred in organic matter-enriched siliciclatic rocks including mudstone, shale and stone coal seams. Meanwhile, Se enrichment was accompanied with enrichment of Ag, Mo, As, Cd and V in Lujiaping Formation. Various geochemical proxies were collectively employed to identify potential mechanism of Se enrichment. The results indicated that Se was derived from both terrestrial detrital materials and deep hydrothermal fluids. Strong Se anomaly was intimately linked to authigenic enrichment of U and Mo, manifesting advantageous role of euxinic benthic condition to Se accumulation. Besides, weak watermass restriction, intermittent upwelling, high primary productivity and warm and humid climate were also beneficial to ultimate Se enrichment in Lujiaping Formation. This study complemented fundamental data of Se concentration and enrichment degree in strata of the Ediacaran-early Cambrian period in central South Qinling. Meanwhile, preliminary insight of correlation among Se enrichment, sedimentary environment, paleo-climate and biological blooming during the Ediacaran to early Cambrian interval was obtained, which laid the foundation for further researches.
WOS关键词RARE-EARTH-ELEMENTS ; ORGANIC-MATTER ENRICHMENT ; BLACK ROCK SERIES ; YANGTZE PLATFORM ; GEOCHEMICAL CHARACTERISTICS ; DOUSHANTUO FORMATION ; PRECAMBRIAN/CAMBRIAN BOUNDARY ; DEPOSITIONAL-ENVIRONMENTS ; OCEAN OXYGENATION ; SELENOSIS AREA
WOS研究方向Physical Geography ; Geology ; Paleontology
WOS记录号WOS:001240439800001
出版者ELSEVIER
源URL[http://ir.igsnrr.ac.cn/handle/311030/205281]  
专题资源利用与环境修复重点实验室_外文论文
通讯作者Luo, Kunli
作者单位1.China Univ Min & Technol Beijing, Sch Geosci & Surveying Engn, Beijing 100083, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resource Res, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Minmin,Yang, Sujiao,Zhang, Shixi,et al. Enrichment mechanism of selenium in Lujiaping formation in central South Qinling: Controls from mixed sources, sedimentary environment, primary productivity and paleo-climate during Ediacaran to early Cambrian period[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2024,647:112256.
APA Zhang, Minmin,Yang, Sujiao,Zhang, Shixi,&Luo, Kunli.(2024).Enrichment mechanism of selenium in Lujiaping formation in central South Qinling: Controls from mixed sources, sedimentary environment, primary productivity and paleo-climate during Ediacaran to early Cambrian period.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,647,112256.
MLA Zhang, Minmin,et al."Enrichment mechanism of selenium in Lujiaping formation in central South Qinling: Controls from mixed sources, sedimentary environment, primary productivity and paleo-climate during Ediacaran to early Cambrian period".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 647(2024):112256.

入库方式： OAI收割

来源：地理科学与资源研究所

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