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The Contrast Of Geological Feature And Genesis Between Xiejiagou Gold Deposit And Jiaojia Gold Deposit In Jiaodong Area

Posted on:2006-04-18Degree:DoctorType:Dissertation
Country:ChinaCandidate:H B XinFull Text:PDF
GTID:1100360155951271Subject:Mineralogy, petrology, ore deposits
Abstract/Summary:PDF Full Text Request
Xiejiagou gold deposit is a newly found gold deposit in Jiaodong area, which is named as a syn-ductile sheer zone altered rock-type gold deposit. Jiaojia gold deposit is the locality where the fractured altered rock-type gold deposit is named. The former is controlled by a ductile sheer zone, while the latter is controlled by a brittle-ductile fault. The study degree of the former is lower, while the latter is known very well by people. In order to make clear the geologic feature and the genesis of Xiejiagou gold deposit, the text compares the two gold deposit types in detail. The study is carried through from deposit geology, geochemical feature, rare earth element geochemistry, isotope geochemical feature and fluid inclusion geochemical feature. The study on the geologic feature shows that the ore-controlled structure of Xiejiagou gold deposit mainly is a ductile sheer zone. Although there are some little faults is Xiejiagou gold deposit, they are formed after mineralization. They destroyed mineralization. The study on the geochemical feature shows: the main metallogenic factor of Xiejiagou gold deposit is F1: Au,Ag,As,Bi,Cu,Pb,Mo,Sb,Co,Ni,Mn, which is the microelement assemble of the main Au-metallogenic period. Its axial zoning sequence of the primary halo suggests that the scale of its orebodies is small, which are mainly overlapped. The main metallogenic factor of orebody â… in Jiaojia gold deposit is F1: Au,Ag,As,Bi,Pb; that of orebody â…¢is F1: Au,Ag,Sb,Hg,Bi,Co,Cu,Pb,Zn. The study on rare earth element geochemical featrue shows: there are obvious difference in matter origin and evolvement mechanism between the formation of Xiejiagou gold deposit and the formation of biotite granite. The rare earth element distribution curve of ore, granite and Jiaodong group stratum is nearly fitted in Jiaojia gold deposit, which suggests the matter origin is uniform. We can determine that it is the result of the remelting of Jiaodong group stratum. The study on isotope geochemical feature shows: there is no obvious difference in the metallogenic age between Xiejiagou gold deposit and Jiaojia gold deposit, both...
Keywords/Search Tags:Xiejiagou gold deposit, Jiaojia gold deposit, genesis contrast, mineralization model
PDF Full Text Request
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