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Distribution characteristics and controlling factors of typical heavy metals in Huanghe River estuary,China

Journal of Oceanology and Limnology 2023年第1期41卷 150-165页

作者： Yuxi LU Dawei PAN Tingting YANG Chenchen WANG Institute of Oceanology Chinese Academy of SciencesQingdao 266071China CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation Shandong Key Laboratory of Coastal Environmental ProcessesResearch Center for Coastal Environment Engineering Technology of Shandong ProvinceYantai Institute of Coastal Zone ResearchChinese Academy of SciencesYantai 264003China University of Chinese Academy of Sciences Beijing 100049China College of Chemistry and Chemical Engineering Yantai UniversityYantai 264005China

The geochemical characteristics and potential controlling factors of colloidal Zn,Cd,and Pb in Huanghe(Yellow)River estuary(HRE),China were *** three metals were highly variable over a range of spatiotemporal scales,comprehensively forced by various physical and biological *** dissolved Zn,Cd,and Pb varied from 200.1 to 321.7,2.6 to 4.1,and 0.5 to 1.0 nmol/L,*** one near-estuarine station of Zn had contamination factor values>1,which indicate the lower contaminant *** dissolved species of Zn,Cd and Pb were fractionated,namelygeochemical features,migration and fate in estuaries.

关键词： colloidal heavy metal size fraction Huanghe(Yellow)River estuary geochemical feature

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Cementation and diagenetic fluid of algal dolomites in the Sinian Dengying Formation in southeastern Sichuan Basin

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Science China Earth Sciences 2013年第2期56卷 192-202页

作者： SHI ZeJin WANG Yong TIAN YaMing WANG ChangCheng State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology College of Energy Resources Chengdu University of Technology Department of Geochemistry Chengdu University of Technology College of Earth Sciences Chengdu University of Technology

The Sinian Dengying Formation in China hosts one of the oldest gas-bearing reservoirs in the *** a long geological history,it has developed into the reservoir rocks,whose quality depends on chemical dissolution and *** presence of cavities and pores in the algal dolomites of the Dengying Formation,they were mostly filled with various forms of dolomite ***,the investigation of these dolomites and their evolution is significant for analyzing the mechanism of pore space *** are five types of cements in the Dengying Formation,which were well sampled for lab measurements such as thin section,cathodeluminescence,minor elements,isotope analysis of carbon,oxygen and strontium,in attempt to explore the fillers' geochemical characteristics and the diagenetic *** are characterized as follows:firstly,fibrous rim dolomite cement is a typical product formed at sea bottom,and geochemically very similar to the matrix(micrite and microcrystalline dolomite),which could be a reflection of the geochemical characteristics of water at that time;secondly,the diagenetic fluids of the foliated dolomite cements tend to be inheriting,derived from the shallow burial "imprisoned" seawater;thirdly,fine-to medium-grained dolomite cements with fairly high strontium isotopes and low carbon and oxygen isotopes were precipitated chiefly in freshwater during the period of uplifting caused by Tongwan tectonic movement;fourthly,coarse-grained dolomite cements bear a relatively high percentage of Mn element,but low in Fe and Sr,with carbon and oxygen isotopes remarkably shifted to negative values,which all show that they are related to hydrocarbon maturation and migration,and corresponding Thermochemical Sulfate Reduction;lastly,saddle-shaped dolomite cements are hydrothermally associated,and they were formed in high-temperature brine,which had passed through the areas rich in radioactive strontium isotopes.

关键词： Sinian System Dengying Formation geochemical feature diagenetic fluids dolomite cementation

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geochemical CHARACTERISTICS OF PLATINUM GROUP ELEMENTS IN JINCHUAN SUPER-LARGE SULFIDE COPPER-NICKEL DEPOSIT, JINCHANG CITY, GANSU PROVINCE, CHINA

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Geotectonica et Metallogenia 2005年第2期29卷 152-163页

作者： WANG Ruiting MAO Jingwen HE Ying WANG Dongsheng TANG Zhongli Faculty of Geosciences and Resources China University of Geosciences Beoing 100083China Bureau of Geological Exploration for Nonferrous Metals in Northwest China Xi＇an SX710054 China Institute of Mineral Resources Chinese Academy of Geological SciencesBeifing 100037 China Department of Geology Northwest University Xi＇an SX 710069 China Faculty of Geosciences and Resources Chang＇an University Xi＇an SX 710054 China

The platinum-group element geochemistry of rocks and ores from Jinchuan super-large copper-nickel sulfide deposit is systemically studied in this paper. The Cu/Pd mean ratio of Jinchuan intrusion is lower than that of original mantle magma, which indicates that these ultrabasic rocks were crystallized from magma that lost Pd in the form of melting segregation of sulfides. The PGE of the rocks show trend of partial melting, similar to that of mantle peridotite, which shows that magma formation occurs during rock-forming and ore-forming processes. The chondrite normalized PGE patterns of the rocks and ores are well related to each other, which signifies the signatures of multi-episode magmatic intrusion, melting and differentiation in the formation processes of rocks and ores. In addition, analyses about the relation between PGE and S, and study on Re-Os isotopes indicate that few contamination of the crustal substances occurred during the magmatic intrusion and the formation of deposit. However, contamination by crustal substances helps to supply part of the S for the enrichment of PGE. Meanwhile, the hydrothermal process is also advantageous for the enrichment of PGE, especially lbr Pt and Pd, due to deep melting segregation. The characteristic parameters （such as Pt/（Pt＋Pd）, （Pt＋Pd）/（Ru＋Ir＋Os）, Pd/Ir, Cu/（Ni＋Cu）, and so on.） for platinum-group elements for Jinchuan sulfide copper-nickel deposit show the same features as those for sulfide copper-nickel deposit related to basic magma, which also illustrates its original magma property representative of Mg-high tholeiite. Therefore, it is the marie （not ultramafic） magma that resulted in the formation of the superlarge sulfide copper-nickel deposit enriched in Cu and PGE. To sum up, the geochemical characteristics of platinum-group elements in rocks and ores from Jinchuan copper-nickel sulfide deposit are constrained by the continental rift tectonic environment, the parent magma features, the enriched mantel magma so

关键词： platinum group elements copper-nickel sulfide deposit geochemical feature Jinchuan

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