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Article: Fe-Cu deposits in the Kangdian region, SW China: A Proterozoic IOCG (iron-oxide-copper-gold) metallogenic province

TitleFe-Cu deposits in the Kangdian region, SW China: A Proterozoic IOCG (iron-oxide-copper-gold) metallogenic province
Authors
KeywordsChina
IOCG deposit
Kangdian district
Yangtze Block
Issue Date2011
PublisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00126/index.htm
Citation
Mineralium Deposita, 2011, v. 46 n. 7, p. 731-747 How to Cite?
AbstractNumerous Fe-Cu deposits are hosted in the late Paleoproterozoic Dongchuan and Dahongshan Groups in the Kangdian region, SW China. The Dongchuan Group is composed of siltstone, slate, and dolostone with minor volcanic rocks, whereas the Dahongshan Group has undergone lower amphibolite facies metamorphism and consists of quartz mica-schist, albitite, quartzite, marble and amphibolite with local migmatite. Deposits in the Dongchuan Group are commonly localized in the cores of anticlines, in fault bends and intersections, and at lithological contacts. Orebodies are closely associated with breccias, which are locally derived from the host rocks. Fe-oxides (magnetite and/or hematite) and Cu-sulfides (chalcopyrite, bornite) form disseminated, vein-like and massive ores, and typically fill open spaces in the host rocks. The deposits have extensive albite alteration and local K-feldspar alteration overprinted by quartz, carbonate, sericite and chlorite. Deposits in the Dahongshan Group have orebodies sub-parellel to stratification and show crude stratal partitioning of metals. Fe-oxide ores occur as massive and/or banded replacements within the breccia pipes, whereas Cu-sulfide ores occur predominantly as disseminations and veinlets within mica schists and massive magnetite ores. Ore textures suggest that Cu-sulfides formed somewhat later than Fe-oxides, but are possibly within the same mineralization event. Both ore minerals predated regional Neoproterozoic metamorphism. Both orebodies and host rocks have undergone extensive alteration of albite, scapolite, amphibole, biotite, sericite and chlorite. Silica and carbonate alterations are also widespread. Ore-hosting strata have a LA-ICP-MS zircon U-Pb age of 1681±13 Ma, and a dolerite dyke cutting the Fe-oxide orebodies has an age of 1659±16 Ma. Thus, the mineralization age of the Dahongshan deposit is constrained at between the two. All ores from the two groups have high Fe and low Ti, with variable Cu contents. Locally they are rich in Mo, Co, V, and REE, but all are poor in Pb and Zn. Sulfides from the Fe-Cu deposits have δ34S values mostly in the range of +2 to +6 per mil, suggesting a mix of several sources due to large-scale leaching of the strata with the involvement of evaporites. Isotopic dating and field relationships suggest that these deposits formed in the late Paleoproterozoic. Ore textures, mineralogy and alteration characteristics are typical of IOCG-type deposits and thus define a major IOCG metallogenic province with significant implications for future exploration. © 2011 Springer-Verlag.
Persistent Identifierhttp://hdl.handle.net/10722/139147
ISSN
2015 Impact Factor: 3.467
2015 SCImago Journal Rankings: 1.677
ISI Accession Number ID
Funding AgencyGrant Number
Opening Foundation of State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, CAS200802
HKU201007176073
Research Grant Council of Hong KongHKU707009P
CASKZCX2-YW-t004
Funding Information:

This study is supported by Opening Foundation of State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, CAS (200802), a Small Project Funding from HKU (201007176073), a grant from the Research Grant Council of Hong Kong (HKU707009P), and the CAS/SAFEA International Partnership Program for Creative Research Teams (KZCX2-YW-t004). We are grateful to Mr. Zhanke Li, Mr. Yousheng Kui, and Mr. Bo Zhao for field assistance and Dr. Liang Qi and Ms. Ying Liu for helping with geochemical analyses. Dr. Louise Corriveau and Prof. Paul Robinson provided useful suggestions on an earlier draft of this paper. The editor, Prof. Bernd Lehmann, and an anonymous reviewer provided insightful and constructive suggestions, which greatly improved the manuscript.

References

 

DC FieldValueLanguage
dc.contributor.authorZhao, XFen_HK
dc.contributor.authorZhou, MFen_HK
dc.date.accessioned2011-09-23T05:46:00Z-
dc.date.available2011-09-23T05:46:00Z-
dc.date.issued2011en_HK
dc.identifier.citationMineralium Deposita, 2011, v. 46 n. 7, p. 731-747en_HK
dc.identifier.issn0026-4598en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139147-
dc.description.abstractNumerous Fe-Cu deposits are hosted in the late Paleoproterozoic Dongchuan and Dahongshan Groups in the Kangdian region, SW China. The Dongchuan Group is composed of siltstone, slate, and dolostone with minor volcanic rocks, whereas the Dahongshan Group has undergone lower amphibolite facies metamorphism and consists of quartz mica-schist, albitite, quartzite, marble and amphibolite with local migmatite. Deposits in the Dongchuan Group are commonly localized in the cores of anticlines, in fault bends and intersections, and at lithological contacts. Orebodies are closely associated with breccias, which are locally derived from the host rocks. Fe-oxides (magnetite and/or hematite) and Cu-sulfides (chalcopyrite, bornite) form disseminated, vein-like and massive ores, and typically fill open spaces in the host rocks. The deposits have extensive albite alteration and local K-feldspar alteration overprinted by quartz, carbonate, sericite and chlorite. Deposits in the Dahongshan Group have orebodies sub-parellel to stratification and show crude stratal partitioning of metals. Fe-oxide ores occur as massive and/or banded replacements within the breccia pipes, whereas Cu-sulfide ores occur predominantly as disseminations and veinlets within mica schists and massive magnetite ores. Ore textures suggest that Cu-sulfides formed somewhat later than Fe-oxides, but are possibly within the same mineralization event. Both ore minerals predated regional Neoproterozoic metamorphism. Both orebodies and host rocks have undergone extensive alteration of albite, scapolite, amphibole, biotite, sericite and chlorite. Silica and carbonate alterations are also widespread. Ore-hosting strata have a LA-ICP-MS zircon U-Pb age of 1681±13 Ma, and a dolerite dyke cutting the Fe-oxide orebodies has an age of 1659±16 Ma. Thus, the mineralization age of the Dahongshan deposit is constrained at between the two. All ores from the two groups have high Fe and low Ti, with variable Cu contents. Locally they are rich in Mo, Co, V, and REE, but all are poor in Pb and Zn. Sulfides from the Fe-Cu deposits have δ34S values mostly in the range of +2 to +6 per mil, suggesting a mix of several sources due to large-scale leaching of the strata with the involvement of evaporites. Isotopic dating and field relationships suggest that these deposits formed in the late Paleoproterozoic. Ore textures, mineralogy and alteration characteristics are typical of IOCG-type deposits and thus define a major IOCG metallogenic province with significant implications for future exploration. © 2011 Springer-Verlag.en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://link.springer.de/link/service/journals/00126/index.htmen_HK
dc.relation.ispartofMineralium Depositaen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectChinaen_HK
dc.subjectIOCG depositen_HK
dc.subjectKangdian districten_HK
dc.subjectYangtze Blocken_HK
dc.titleFe-Cu deposits in the Kangdian region, SW China: A Proterozoic IOCG (iron-oxide-copper-gold) metallogenic provinceen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0026-4598&volume=46&issue=7&spage=731&epage=747&date=2011&atitle=Fe-Cu+deposits+in+the+Kangdian+region,+SW+China:+a+Proterozoic+IOCG+(iron-oxide-copper-gold)+metallogenic+province-
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s00126-011-0342-yen_HK
dc.identifier.scopuseid_2-s2.0-80255129421en_HK
dc.identifier.hkuros192927en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80255129421&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume46en_HK
dc.identifier.issue7en_HK
dc.identifier.spage731en_HK
dc.identifier.epage747en_HK
dc.identifier.isiWOS:000296065900004-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridZhao, XF=49061648300en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.citeulike8972709-

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