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Deposit Features And Causes Of South Ore Area In The Wushan Copper Deposit

Posted on:2017-02-19Degree:MasterType:Thesis
Country:ChinaCandidate:J ZhaoFull Text:PDF
GTID:2180330503479331Subject:Geology
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Wushan Copper Mine is a typical skarn-type deposit in the southern region. Based on the field investigation and previous research, this paper study the genesis of the deposit through rock mineralogy, geochemistry, XRD semi-quantitative analysis, some understandings are as fellows:(1) Rock- wall rock alteration is divided into six zones: granodiorite porphyry-skarn granodiorite porphyry-ore(copper-rich garnet skarn)-pomegranate pyroxene skarn-marble/marble of(suicide) limestone-(suicide) limestone/dolomite.Ore body of copper is mainly produced in rich garnet skarn belt.(2) The intrusion’lithology in ore district mainly are Biotite granodiorite porphyry and granodiorite porphyry shoshonite and high potassium calc-alkaline, alkaline individual belonged series; REE and trace element spider diagrams consistent trends were significantly,enriched in LILE Ba, Rb, Th, etc., and the relative loss of Nb, Ta, Zr, Ti in high field strength elements(HFSE), suggesting that they may experience a similar evolution as well as a similar source material.(3) The carbon of marble and marble limestone rock of Wushan Copper from the rock,and oxygen of them mainly from rock oxygen, some of them might come from low δ18O magmatic hydrothermal fluid; skarn rock and copper skarns lower than before both carbon and oxygen isotopic composition, because the result of this feature is to explain the process of skarn formation of magma and rock fluid interaction;(4) Wushan Mine granodiorite porphyry LA-ICP-MS zircon U-Pb ages is respectively in 145 Ma, molybdenite Re-Os dating is 143 Ma.It is indicated that diagenetic mineralization age is the early period of Yanshan in Wushan copper...
Keywords/Search Tags:Wushan Copper Mine, Skarn, Garnet, X-ray(XRD), Deposit genesis
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