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Article: The C-H-O isotope systematics of the Yangshan gold deposit, Gansu and its implication for the ore-fluid origin

TitleThe C-H-O isotope systematics of the Yangshan gold deposit, Gansu and its implication for the ore-fluid origin
Authors
KeywordsC-H-O Isotope Systematics
Ore-Fluid
Qinling Orogen
Yangshan Gold Deposit
Issue Date2008
PublisherKexue Chubanshe
Citation
Acta Petrologica Sinica, 2008, v. 24 n. 4, p. 817-826 How to Cite?
AbstractThe Yangshan gold deposit, Wenxian county, Gansu province, containing 308 t Au with average grade of 4.74g/t, is now ranked as the China' s largest gold deposit. Locating in western Qinling Orogen, central China, it is a syn-collisionally formed Carlin-like gold deposit. Its orebodies are controlled by an east-trending shear-zone and hosted in the Devonian carbonaceous carbonate-phyllite-slate sequence or the granite-porphyry dikes intruding into the Devonian strata. The δ13 CCO2(PDB) and δ13 CCH4(PDB) ratios of fluid inclusions within quartz separates range -2.5‰ ∼ -5.6‰ and -23.1‰ ∼ -32.6‰, respectively, suggesting that the ore-fluids have been mainly sourced, through metamorphism and/or reworking, from the Devonian strata or/and similar lithologies which comprise carbonaceous phyllite, slate, chert and carbonate. This conclusion is strongly supported by the δ18 O values of the early- and main-stage ore fluids, which range from 9.5‰ to 15.3‰, with corresponding δD values between -86‰ ∼ -73‰. Two δ18 O values of late ore-forming stage ore-fluids are 2.7‰ and 6.8‰, implying a significant input of meteoric water. In general, the ore-forming fluid-system varies from early, deep, metamorphic fluid to late, shallow, meteoric water. It is worthy of stating that the above results and understandings are consistent with conclusions drawn from our studies of fluid inclusions and ore geology.
Persistent Identifierhttp://hdl.handle.net/10722/92026
ISSN
2015 Impact Factor: 1.234
2015 SCImago Journal Rankings: 0.892
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Jen_HK
dc.contributor.authorChen, YJen_HK
dc.contributor.authorLi, QZen_HK
dc.contributor.authorMao, SDen_HK
dc.contributor.authorQin, Yen_HK
dc.contributor.authorGuo, JHen_HK
dc.contributor.authorNan, ZLen_HK
dc.contributor.authorYang, RSen_HK
dc.date.accessioned2010-09-17T10:33:53Z-
dc.date.available2010-09-17T10:33:53Z-
dc.date.issued2008en_HK
dc.identifier.citationActa Petrologica Sinica, 2008, v. 24 n. 4, p. 817-826en_HK
dc.identifier.issn1000-0569en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92026-
dc.description.abstractThe Yangshan gold deposit, Wenxian county, Gansu province, containing 308 t Au with average grade of 4.74g/t, is now ranked as the China' s largest gold deposit. Locating in western Qinling Orogen, central China, it is a syn-collisionally formed Carlin-like gold deposit. Its orebodies are controlled by an east-trending shear-zone and hosted in the Devonian carbonaceous carbonate-phyllite-slate sequence or the granite-porphyry dikes intruding into the Devonian strata. The δ13 CCO2(PDB) and δ13 CCH4(PDB) ratios of fluid inclusions within quartz separates range -2.5‰ ∼ -5.6‰ and -23.1‰ ∼ -32.6‰, respectively, suggesting that the ore-fluids have been mainly sourced, through metamorphism and/or reworking, from the Devonian strata or/and similar lithologies which comprise carbonaceous phyllite, slate, chert and carbonate. This conclusion is strongly supported by the δ18 O values of the early- and main-stage ore fluids, which range from 9.5‰ to 15.3‰, with corresponding δD values between -86‰ ∼ -73‰. Two δ18 O values of late ore-forming stage ore-fluids are 2.7‰ and 6.8‰, implying a significant input of meteoric water. In general, the ore-forming fluid-system varies from early, deep, metamorphic fluid to late, shallow, meteoric water. It is worthy of stating that the above results and understandings are consistent with conclusions drawn from our studies of fluid inclusions and ore geology.en_HK
dc.languageengen_HK
dc.publisherKexue Chubansheen_HK
dc.relation.ispartofActa Petrologica Sinicaen_HK
dc.subjectC-H-O Isotope Systematicsen_HK
dc.subjectOre-Fluiden_HK
dc.subjectQinling Orogenen_HK
dc.subjectYangshan Gold Depositen_HK
dc.titleThe C-H-O isotope systematics of the Yangshan gold deposit, Gansu and its implication for the ore-fluid originen_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-s2.0-49149083219en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-49149083219&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume24en_HK
dc.identifier.issue4en_HK
dc.identifier.spage817en_HK
dc.identifier.epage826en_HK

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