He Wang

Guangzhou Institute of Geochemistry

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M. Santosh

China University of Geosciences (Beijing)

Dongyong Li

Ocean University of China

Jun Hu

Ocean University of China

Yanyan Zhao

China University of Geosciences

Rui Dong

Nanjing Institute of Geography and Limnology

Hongbiao Gu

Nanjing Tech University

Qing-He Yan

Guangzhou Institute of Geochemistry

Sanzhong Li

Ocean University of China

Huiqing Ren

Qingdao National Laboratory for Marine Science and Technology

Shuangshuang Lan

Beijing University of Technology

Cooperative Institutions

Ocean University of China

Chinese Academy of Sciences

Qingdao National Laboratory for Marine Science and Technology

Laoshan Laboratory

China University of Geosciences

University of Chinese Academy of Sciences

Guangzhou Institute of Geochemistry

Institute of Disaster Prevention

University of Science and Technology of China

Nanjing Tech University

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The source and depositional environment of early Silurian iron formation in NW China: Constraints from element and isotope (Fe, C, O) geochemistry

Ore Geology Reviews (2022)

Jun Hu Min Wang He Wang Sanzhong Li M. Santosh

Phanerozoic iron formations (IFs) provide a unique opportunity to understand both the contemporaneous chemical composition and redox state of seawater where they precipitated. However, the absence of detailed reports of Phanerozoic IFs inhibits a robust understanding of their depositional conditions and dominant Fe sources. Here, we describe a hematite- and siderite-rich IF from Kukeate hosted within lower Silurian submarine siliciclastic and carbonate sedimentary succession in NW China. The chemical composition of our analysed samples is dominated by high TFe2O3 and variable SiO2 contents, with low Al2O3, TiO2, Sc, Nb, Th, and Zr concentrations, indicating an authigenic origin. Distinct depletion in LREE relative to HREE, super-chondritic Y/Ho ratios, and slightly positive Gd anomalies, are diagnostic for derivation from surface seawater. The lack of strong positive Eu anomaly, along with coupled Fe and O isotopic characteristics for the hematite, point to a significant low-T hydrothermal input. Slightly negative to no Ce anomalies, weakly negative to mildly positive Eu anomalies, homogeneous δ56Fe values (near zero), and large positive δ13CV-PDB excursions, together suggest that there exists a dynamic redoxcline, which separated oxic surface water and ferruginous deeper water conditions, where dissolved Fe2+ in deep, reducing, Fe-rich hydrothermal fluids, was oxidized and precipitated as Fe(OH)3 in shallow oxygenated seawater, leading to the formation of hematite. Accordingly, the occurrence of Kukeate IF suggests intermittent ferruginous deeper water conditions during the early Silurian.

Authigenic

Siliciclastic

10.1016/j.oregeorev.2022.105165

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Citations (3)

Bioavailability of adsorbed and coprecipitated Cu, Ni, Pb, and Cd on iron and iron/aluminum hydroxide to Phragmites australis

Environmental Science and Pollution Research (2016)

He Wang Yongfeng Jia

Phragmites

Aluminium hydroxide

Coprecipitation

10.1007/s11356-016-7840-5

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Human health risk assessment and sources analysis of nitrate in shallow groundwater of the Liujiang basin, China

Human and Ecological Risk Assessment An International Journal (2018)

He Wang Hongbiao Gu Shuangshuang Lan Mingyuan Wang Baoming Chi

High levels of nitrates in groundwater pose a risk to human health. Hence, groundwater-human health risk assessment and sources analysis are essential. The article aims to assess risk level and identify sources of nitrate in shallow groundwater of the Liujiang basin by using a human health risk assessment (HHRA) model, Factor analysis (FA) and GIS spatial analysis. The results indicated that the most serious pollution was distributed in southern region of the basin; about 60% of the samples exceeded the recommended limit of nitrate as per the World Health Organization limit. Moreover, ingants' health risk were greater than those of adults and children, and about 56% of the groundwater samples will put the infants at risk of health. FA was used to identify various underlying natural and anthropogenic processes that created these distinct risk levels. The FA results can be categorized by two major factors: (1) Organic fertilizers and sewage discharge contamination in central region. (2) Blocking effect of granite and redox conditions in southern parts. This study demonstrates that the great variation of nitrate risk levels in the basin should be attributed to both natural and anthropogenic processes.

10.1080/10807039.2017.1416455

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Citations (29)