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Study On The Characteristics And Metallogenic Types Of Jurassic Granites Of The Centre And Southern Sector Of Daxinganling

Posted on:2012-11-24Degree:MasterType:Thesis
Country:ChinaCandidate:Y Q YuFull Text:PDF
GTID:2250330401477442Subject:Mineralogy, petrology, ore deposits
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AbstractIt is an important Polymetallic ore belt in the north China in the south-middlepart of the Da Xing an Mountains,many mineral deposits of large or mediumscale have been found In recent years. It is the point at issue which controlmineral, Jurassic granite、Cretaceous granites or Permian granites.All graniteshave relevant mineral deposit in those ate. In recent years,we researchedsome area in Zhalute banner、Keshiketeng banner and Tianshan in in thesouth-middle part of the Da Xing an Mountains,we found nearly100mines,some of those mines are about Jurassic granite.Those are controled by deep and large fractures which are stratigraphy,magmatic rocks and the distribution of mineral deposits in area. Veins、Irruptiverocks and dike rocks are the same time and the same root or possibly a littlelater. Magmatic activity are strong in area,there are granitic intrusive rocks、dike rocks and subvolcanic rocks etc.We acquire detailed knowledge aboutJurassic granite’s types and distribution characteristics through1:50000geological survey in area. We determined any of granite rockscomposition,petrochemical、trace elements and rare earth elements contents.We explained genetic types of granite and metallogenesis types better.We further research geological background and ore-controlling factorsthrough polymetallic controlling. Study regional mineral’s distribution rule inrocks and preliminary study ore-bearing、mineralized alteration zone and therange、size、altitude、mineral elements、useful components and content of orebody.We discuss the characters of Jurassic granites’ form、develop andevolvement,then study ore-controlling factors and ore-forming conditions aboutmetal minerals of Pb、Mo、Zn etc. To study them have important significancesin metallogenic.According to the data of the studying area, and the summary of thediscovered ore deposit and ore (alteration)spot, the deposits of this regionhas a diversity of genetic type, the dominant types are skarn, hydrothermal andPorphyry. By studying several typical deposits of these types,we confirmedthat the formation of the typical deposits in this area is related to the theJurassic magmatic fluid activity,which also played an important role in theenrichment of the ore-forming elements such as Cu, Pb, Zn, Au, Ag. Theseworks provide a clue for further exploration in the areas of the mid-southsection of Daxinganling.
Keywords/Search Tags:metallogenic types, geochemistry, Jurassic granite, in thesouth-middle part of the Da Xing an Mountains
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