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Article: Giant Mesozoic gold provinces related to the destruction of the North China craton

TitleGiant Mesozoic gold provinces related to the destruction of the North China craton
Authors
KeywordsLithospheric destruction
Lode gold
Mantle-derived fluids
North china craton
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
Earth and Planetary Science Letters, 2012, v. 349, p. 26-37 How to Cite?
AbstractLode gold deposits in Precambrian cratons represent the world's major gold source and were mostly generated during formation and stabilization of the cratons. However, there is an extraordinary exception in the North China craton (NCC), where lode gold deposits formed after prolonged stabilization of the craton. Molybdenite Re-Os and hydrothermal sericite and biotite 40Ar/ 39Ar dating of major gold deposits from the Xiaoqinling district, southern NCC, bracket their emplacement in the range of 154.1±1.1 to 118.9±1.2Ma (n=23), postdating formation of the craton by more than 1.7 billion years. Fluid inclusions extracted from gold-bearing pyrite have elevated 3He/ 4He ratios (1.52-0.22Ra) and mantle-like Ne isotopes ( 20Ne/ 22Ne=10.02-9.22 and 21Ne/ 22Ne=0.033-0.027), indicating presence of mantle-derived fluids in the ore system. Measured δ 34S of pyrite and δD and δ 18O of hydrothermal micas and fluid inclusion waters in auriferous quartz further confirm a magmatic/mantle source for sulfur and ore fluids. Gold deposits of similar ages also widely occur in the eastern and northern margins of the NCC, which, together with those in the Xiaoqinling district, have a total reserve of 2500t gold, forming the only known giant late Mesozoic gold province in the world's Precambrian cratons. These deposits formed coevally with extensive felsic to mafic magmatism, development of intracontinental rift basins, and exhumation of metamorphic core complexes across the eastern NCC, events interpreted as indicating thinning and destruction of the lithosphere beneath the craton. Rising of asthenosphere coupled with destruction of the lithosphere has generated voluminous mafic and felsic magmas that provided sufficient fluids, sulfur and, by inference, other ore components to form the giant gold provinces. © 2012 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/163633
ISSN
2014 Impact Factor: 4.734
2014 SCImago Journal Rankings: 2.967
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, JW-
dc.contributor.authorBi, SJ-
dc.contributor.authorSelby, D-
dc.contributor.authorChen, L-
dc.contributor.authorVasconcelos, P-
dc.contributor.authorThiede, D-
dc.contributor.authorZhou, MF-
dc.contributor.authorZhao, XF-
dc.contributor.authorLi, ZK-
dc.contributor.authorQiu, HN-
dc.date.accessioned2012-09-18T03:33:51Z-
dc.date.available2012-09-18T03:33:51Z-
dc.date.issued2012-
dc.identifier.citationEarth and Planetary Science Letters, 2012, v. 349, p. 26-37-
dc.identifier.issn0012-821X-
dc.identifier.urihttp://hdl.handle.net/10722/163633-
dc.description.abstractLode gold deposits in Precambrian cratons represent the world's major gold source and were mostly generated during formation and stabilization of the cratons. However, there is an extraordinary exception in the North China craton (NCC), where lode gold deposits formed after prolonged stabilization of the craton. Molybdenite Re-Os and hydrothermal sericite and biotite 40Ar/ 39Ar dating of major gold deposits from the Xiaoqinling district, southern NCC, bracket their emplacement in the range of 154.1±1.1 to 118.9±1.2Ma (n=23), postdating formation of the craton by more than 1.7 billion years. Fluid inclusions extracted from gold-bearing pyrite have elevated 3He/ 4He ratios (1.52-0.22Ra) and mantle-like Ne isotopes ( 20Ne/ 22Ne=10.02-9.22 and 21Ne/ 22Ne=0.033-0.027), indicating presence of mantle-derived fluids in the ore system. Measured δ 34S of pyrite and δD and δ 18O of hydrothermal micas and fluid inclusion waters in auriferous quartz further confirm a magmatic/mantle source for sulfur and ore fluids. Gold deposits of similar ages also widely occur in the eastern and northern margins of the NCC, which, together with those in the Xiaoqinling district, have a total reserve of 2500t gold, forming the only known giant late Mesozoic gold province in the world's Precambrian cratons. These deposits formed coevally with extensive felsic to mafic magmatism, development of intracontinental rift basins, and exhumation of metamorphic core complexes across the eastern NCC, events interpreted as indicating thinning and destruction of the lithosphere beneath the craton. Rising of asthenosphere coupled with destruction of the lithosphere has generated voluminous mafic and felsic magmas that provided sufficient fluids, sulfur and, by inference, other ore components to form the giant gold provinces. © 2012 Elsevier B.V.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl-
dc.relation.ispartofEarth and Planetary Science Letters-
dc.subjectLithospheric destruction-
dc.subjectLode gold-
dc.subjectMantle-derived fluids-
dc.subjectNorth china craton-
dc.titleGiant Mesozoic gold provinces related to the destruction of the North China cratonen_US
dc.typeArticleen_US
dc.identifier.emailLi, JW: jwli@cug.edu.cn-
dc.identifier.emailZhou, MF: mfzhou@hkucc.hku.hk-
dc.identifier.emailZhao, XF: xinfu@hku.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.epsl.2012.06.058-
dc.identifier.scopuseid_2-s2.0-84864413361-
dc.identifier.hkuros206534-
dc.identifier.volume349-
dc.identifier.spage26-
dc.identifier.epage37-
dc.identifier.isiWOS:000309486500004-
dc.publisher.placeNetherlands-
dc.identifier.citeulike11231437-

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