File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Geological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asia

TitleGeological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asia
Authors
KeywordsFluid inclusions
Hydrothermal alteration
Ore fluid
Porphyry copper deposit
Radiometric age
Tuwu, Xinjiang, China
Issue Date2006
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/oregeorev
Citation
Ore Geology Reviews, 2006, v. 29 n. 1, p. 77-94 How to Cite?
AbstractThe Tuwu copper deposit, located in the Dananhu-Tousuquan island arc between the Kazakhstan-Junggar and Tarim plates, is one of the largest porphyry copper deposits in western China. Ore-hosting rocks consist of Early Carboniferous (333 ± 2 Ma) granodiorite- and plagiogranite-porphyries. Both the porphyries are elongate. The orebodies, consisting of veinlet-disseminated mineralization within the porphyries, grade range from 0.30% to 1.50% Cu. Mineralization can be assigned to six stages. Wall-rock alteration associated with the mineralization include silicification, chloritization, epidotization, sericitization and carbonatization. Three alteration zones have been recognized: phyllic zone, chlorite-biotite zone and propylitic zone. Re-Os dating indicates a 322.7 ± 3 Ma age for the deposit. δ 34S values of the ore sulfides range from - 0.9‰ to + 1.3‰, with a mean of 0.11‰, reflecting a deep sulfur source. δ 18O values of quartz in the ores range from 7.70‰ to 9.70‰, and the δ 18O value of chlorite in the ores is 6.62‰. Calculated δ 18O water values of quartz and chlorite range from - 5.37‰ to + 6.62‰ and the δD values range from - 48‰ to - 63‰, suggesting that the ore fluids were mainly magma-derived in the early stage of mineralization. However, values for the late mineralization stage decrease, suggesting the addition of meteoric waters during the mineralization. Fluid inclusions within quartz grains are generally 3 to 30 μm in size, with gas proportions ranging from 5% to 60%, mostly from 10% to 15%. Homogenization temperatures of fluid inclusions are relatively low, bracketed between 101 and 409 °C, mostly between 100 and 200 °C. Salinities exhibit a wide range from 0.35 to 14.61 wt.% NaCl equiv., with a mean of 7.72 wt.% NaCl equiv., suggesting that ore fluids have low to moderate salinity. The ore-bearing plagiogranite porphyries show a strong depletion in heavy rare-earth elements, with average values of Yb and Y of 0.65 and 5.90 ppm, respectively, this being a characteristic geochemical signature for adakite. The geochemical signature of the adakites within the granitoid rocks represents a characteristic guide for further exploration for copper porphyry-type ore deposit in Eastern Tianshan. © 2005 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72887
ISSN
2015 Impact Factor: 3.819
2015 SCImago Journal Rankings: 1.753
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHan, Cen_HK
dc.contributor.authorXiao, Wen_HK
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorMao, Jen_HK
dc.contributor.authorYang, Jen_HK
dc.contributor.authorWang, Zen_HK
dc.contributor.authorYan, Zen_HK
dc.contributor.authorMao, Qen_HK
dc.date.accessioned2010-09-06T06:46:03Z-
dc.date.available2010-09-06T06:46:03Z-
dc.date.issued2006en_HK
dc.identifier.citationOre Geology Reviews, 2006, v. 29 n. 1, p. 77-94en_HK
dc.identifier.issn0169-1368en_HK
dc.identifier.urihttp://hdl.handle.net/10722/72887-
dc.description.abstractThe Tuwu copper deposit, located in the Dananhu-Tousuquan island arc between the Kazakhstan-Junggar and Tarim plates, is one of the largest porphyry copper deposits in western China. Ore-hosting rocks consist of Early Carboniferous (333 ± 2 Ma) granodiorite- and plagiogranite-porphyries. Both the porphyries are elongate. The orebodies, consisting of veinlet-disseminated mineralization within the porphyries, grade range from 0.30% to 1.50% Cu. Mineralization can be assigned to six stages. Wall-rock alteration associated with the mineralization include silicification, chloritization, epidotization, sericitization and carbonatization. Three alteration zones have been recognized: phyllic zone, chlorite-biotite zone and propylitic zone. Re-Os dating indicates a 322.7 ± 3 Ma age for the deposit. δ 34S values of the ore sulfides range from - 0.9‰ to + 1.3‰, with a mean of 0.11‰, reflecting a deep sulfur source. δ 18O values of quartz in the ores range from 7.70‰ to 9.70‰, and the δ 18O value of chlorite in the ores is 6.62‰. Calculated δ 18O water values of quartz and chlorite range from - 5.37‰ to + 6.62‰ and the δD values range from - 48‰ to - 63‰, suggesting that the ore fluids were mainly magma-derived in the early stage of mineralization. However, values for the late mineralization stage decrease, suggesting the addition of meteoric waters during the mineralization. Fluid inclusions within quartz grains are generally 3 to 30 μm in size, with gas proportions ranging from 5% to 60%, mostly from 10% to 15%. Homogenization temperatures of fluid inclusions are relatively low, bracketed between 101 and 409 °C, mostly between 100 and 200 °C. Salinities exhibit a wide range from 0.35 to 14.61 wt.% NaCl equiv., with a mean of 7.72 wt.% NaCl equiv., suggesting that ore fluids have low to moderate salinity. The ore-bearing plagiogranite porphyries show a strong depletion in heavy rare-earth elements, with average values of Yb and Y of 0.65 and 5.90 ppm, respectively, this being a characteristic geochemical signature for adakite. The geochemical signature of the adakites within the granitoid rocks represents a characteristic guide for further exploration for copper porphyry-type ore deposit in Eastern Tianshan. © 2005 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/oregeoreven_HK
dc.relation.ispartofOre Geology Reviewsen_HK
dc.subjectFluid inclusionsen_HK
dc.subjectHydrothermal alterationen_HK
dc.subjectOre fluiden_HK
dc.subjectPorphyry copper depositen_HK
dc.subjectRadiometric ageen_HK
dc.subjectTuwu, Xinjiang, Chinaen_HK
dc.titleGeological characteristics and genesis of the Tuwu porphyry copper deposit, Hami, Xinjiang, Central Asiaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0169-1368&volume=29&issue=1&spage=77&epage=94&date=2006&atitle=Geological+characteristics+and+genesis+of+the+Tuwu+porphyry+copper+deposit,+Hami,+Xinjiang,+Central+Asiaen_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.oregeorev.2005.07.032en_HK
dc.identifier.scopuseid_2-s2.0-33744539563en_HK
dc.identifier.hkuros127561en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33744539563&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume29en_HK
dc.identifier.issue1en_HK
dc.identifier.spage77en_HK
dc.identifier.epage94en_HK
dc.identifier.isiWOS:000239102100004-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridHan, C=35794513200en_HK
dc.identifier.scopusauthoridXiao, W=7202456615en_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridMao, J=7402727757en_HK
dc.identifier.scopusauthoridYang, J=49161341100en_HK
dc.identifier.scopusauthoridWang, Z=7410045002en_HK
dc.identifier.scopusauthoridYan, Z=35290798700en_HK
dc.identifier.scopusauthoridMao, Q=35916504900en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats