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Article: Hydrothermal metallogeny of the Shanggong gold deposit, east Qinling: Radiogenic isotope geochemistry

TitleHydrothermal metallogeny of the Shanggong gold deposit, east Qinling: Radiogenic isotope geochemistry
Authors
KeywordsContinental Collision
East Qinling
Ore Fluid
Radiogenic Isotope
Shanggong Au Deposit
Issue Date2004
Citation
Kuangwu Yanshi, 2004, v. 24 n. 3, p. 22-27 How to Cite?
AbstractThe Shanggong Au deposit, hosted in a continental volcanic sequence of the Xiong'er Group in the Xiong'er Terrane, East Qinling, is a fault-controlled orogenic-type lode gold deposit. In previous studies its ore-forming fluids and metals were interpreted as being originated from the crystalline basement of the Taihua Supergroup (namely, primary source-bed), the Xiong'er Group (secondary source-bed), and/or the Yanshanian (Jurassic-Cretaceous) granitoids. The lower crust and the mantle beneath the Xiong'er terrane were also suggested as the source. However, these interpretations are not spported by the radiogenic isotope data presented in this paper. Instead, the radiogenic isotope data, including Sr and Pb, show that the ore-forming fluids and metals have been sourced from a sedimentary sequence of the Guandaokou and Luanchuan Groups outcroped in the south of the ore-hosting terrane. Metamorphic devolatilization of the sedimentary sequence during its north-dipping intracontinental subduction along the Machaoying fault resulted in the development of ore-forming fluid-system and the formation of the Shanggong gold deposit. The 40Ar/39Ar dating of the early-stage quartz yields an age of 222. 8 Ma±24.9 Ma. Rb/Sr isochron dating for alteration minerals or rocks formed in the early, middle and late stages yield ages of 242 Ma±10 Ma, 165 Ma±7 Ma and 113 M±6 Ma, respectively. This shows that the metallogenesis occurred in the period of 250 Ma ∼ 100 Ma, and was coeval with continental collision between the Yangtze and North China plates.
Persistent Identifierhttp://hdl.handle.net/10722/92308
ISSN
2015 SCImago Journal Rankings: 0.169
References

 

DC FieldValueLanguage
dc.contributor.authorChen, Y-Jen_HK
dc.contributor.authorTang, G-Jen_HK
dc.contributor.authorPirajno, Fen_HK
dc.contributor.authorQi, J-Pen_HK
dc.contributor.authorLin, Z-Jen_HK
dc.date.accessioned2010-09-17T10:42:13Z-
dc.date.available2010-09-17T10:42:13Z-
dc.date.issued2004en_HK
dc.identifier.citationKuangwu Yanshi, 2004, v. 24 n. 3, p. 22-27en_HK
dc.identifier.issn1001-6872en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92308-
dc.description.abstractThe Shanggong Au deposit, hosted in a continental volcanic sequence of the Xiong'er Group in the Xiong'er Terrane, East Qinling, is a fault-controlled orogenic-type lode gold deposit. In previous studies its ore-forming fluids and metals were interpreted as being originated from the crystalline basement of the Taihua Supergroup (namely, primary source-bed), the Xiong'er Group (secondary source-bed), and/or the Yanshanian (Jurassic-Cretaceous) granitoids. The lower crust and the mantle beneath the Xiong'er terrane were also suggested as the source. However, these interpretations are not spported by the radiogenic isotope data presented in this paper. Instead, the radiogenic isotope data, including Sr and Pb, show that the ore-forming fluids and metals have been sourced from a sedimentary sequence of the Guandaokou and Luanchuan Groups outcroped in the south of the ore-hosting terrane. Metamorphic devolatilization of the sedimentary sequence during its north-dipping intracontinental subduction along the Machaoying fault resulted in the development of ore-forming fluid-system and the formation of the Shanggong gold deposit. The 40Ar/39Ar dating of the early-stage quartz yields an age of 222. 8 Ma±24.9 Ma. Rb/Sr isochron dating for alteration minerals or rocks formed in the early, middle and late stages yield ages of 242 Ma±10 Ma, 165 Ma±7 Ma and 113 M±6 Ma, respectively. This shows that the metallogenesis occurred in the period of 250 Ma ∼ 100 Ma, and was coeval with continental collision between the Yangtze and North China plates.en_HK
dc.languageengen_HK
dc.relation.ispartofKuangwu Yanshien_HK
dc.subjectContinental Collisionen_HK
dc.subjectEast Qinlingen_HK
dc.subjectOre Fluiden_HK
dc.subjectRadiogenic Isotopeen_HK
dc.subjectShanggong Au Depositen_HK
dc.titleHydrothermal metallogeny of the Shanggong gold deposit, east Qinling: Radiogenic isotope geochemistryen_HK
dc.typeArticleen_HK
dc.identifier.emailChen, Y:ychenc@hkucc.hku.hken_HK
dc.identifier.authorityChen, Y=rp1318en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-10644283046en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-10644283046&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume24en_HK
dc.identifier.issue3en_HK
dc.identifier.spage22en_HK
dc.identifier.epage27en_HK

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