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典型文献
Geology, Mineralogy, and Isotopic Characteristics of the Zhonghe Ag-Pb-Zn Deposit, Western Henan Province, Central China
文献摘要:
Located in Luoning County, western Henan Province, Central China, the Zhonghe Ag- Pb-Zn ore field, is a newly discovered deposit in the Xiaoshan District. Ore bodies controlled by NNW Faults occur as veins within the Paleoproterozoic Xiong ' er Group or the Early Cretaceous porphyritic granite. Given that the Zhonghe deposit has been covered by thick Quaternary sediments, the parage- netic mineral assemblage was determined mainly by microscopic observations, including the quartz- siderite-pyrite alteration (Stage I), polymetallic sulfide precipitation (Stage Ⅱ), silver mineralization (StageⅢ), and quartz-carbonate stage (StageⅣ). The host minerals for silver are diverse, such as frei- bergite, pyrargyrite, polybasite, argyrodite, canfieldite, argentite, and native silver, whereas those for Pb and Zn are galena and sphalerite, respectively. In order to constrain the ore-forming components of the Zhonghe deposit, a combined in-situ analysis was conducted on represented sulfides from StageⅡ and StageⅢ. In-situδ34S values of the analyzed sulfides, including the pyrite, chalcopyrite, sphalerite, and galena, display a relatively narrow range (0.90‰-5.0‰), which is close to magmatic sulfur source. The 206Pb/204Pb and 207Pb/204Pb ratios show a narrow range (17.140-17.360 and 15.385-15.490), whereas the 208Pb/204Pb ratios exhibit a broad variation (36.601-37.943), indicating a contamination of the Xiong ' er Group. Synthesis of geochronological and geochemical data from the Xiaoshan District, we contend that the ore-forming materials of the Zhonghe Ag-Pb-Zn deposit are originated from the lower crust, which has presumably been influenced by the large-scale lithospheric delamination of the east- ern North China Craton during the Early Cretaceous. In consideration of the geological setting, miner- alogy, and geochemical compositions, we suggest that the Zhonghe Ag-Pb-Zn deposit is characterized as intermediate sulfidation type epithermal deposit, and may be a potential exploration target for por- phyry Mo-Cu deposits.
文献关键词:
作者姓名:
Jiannan Xu;Changqian Ma;Shuo Yin;Yunzhen Chang;Huimin Jia;Zhongjie Wang;Liangliang Shi
作者机构:
State Key Laboratory of Geological Processes and Mineral Resources,School of Earth Sciences,China University of Geosciences,Wuhan 430074,China;State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;No.1 Institute of Geological and Mineral Resources Survey,Henan Bureau of Geo-Exploration&Mineral Development,Luoyang 471000,China
引用格式:
[1]Jiannan Xu;Changqian Ma;Shuo Yin;Yunzhen Chang;Huimin Jia;Zhongjie Wang;Liangliang Shi-.Geology, Mineralogy, and Isotopic Characteristics of the Zhonghe Ag-Pb-Zn Deposit, Western Henan Province, Central China)[J].地球科学学刊(英文版),2022(01):177-192
A类:
Mineralogy,Zhonghe,Luoning,Xiaoshan,parage,frei,bergite,pyrargyrite,polybasite,canfieldite,argentite,alogy
B类:
Geology,Isotopic,Characteristics,Ag,Deposit,Henan,Province,Central,China,Located,County,western,ore,newly,discovered,District,Ore,bodies,controlled,by,NNW,Faults,occur,veins,within,Paleoproterozoic,Xiong,Group,Early,Cretaceous,porphyritic,granite,Given,that,has,been,thick,Quaternary,sediments,netic,assemblage,was,determined,mainly,microscopic,observations,including,quartz,siderite,alteration,Stage,polymetallic,precipitation,silver,mineralization,carbonate,stage,host,minerals,are,diverse,such,argyrodite,native,whereas,those,galena,sphalerite,respectively,In,order,constrain,forming,components,combined,situ,analysis,conducted,represented,sulfides,from,34S,values,analyzed,chalcopyrite,display,relatively,narrow,range,which,close,magmatic,sulfur,source,206Pb,204Pb,207Pb,ratios,show,208Pb,exhibit,broad,variation,indicating,contamination,Synthesis,geochronological,geochemical,data,contend,materials,originated,lower,crust,presumably,influenced,large,scale,lithospheric,delamination,east,North,Craton,during,consideration,geological,setting,compositions,suggest,characterized,intermediate,sulfidation,type,epithermal,may,potential,exploration,target,phyry,Mo,deposits
AB值:
0.520489
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