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dc.contributor.authorMueller, A.
dc.contributor.authorHall, G.
dc.contributor.authorNemchin, Alexander
dc.contributor.authorO'Brien, D.
dc.date.accessioned2017-01-30T11:49:37Z
dc.date.available2017-01-30T11:49:37Z
dc.date.created2010-04-25T20:02:38Z
dc.date.issued2008
dc.identifier.citationMueller, Andreas G. and Hall, Gregory C. and Nemchin, Alexander A. and O'Brien, Darren. 2008. Chronology of the Pueblo Viejo epithermal gold-silver deposit, Dominican Republic: formation in an Early Cretaceous intra-oceanic island arc and burial under ophiolite. Mineralium Deposita. 43 (8): pp. 873-889.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/15405
dc.identifier.doi10.1007/s00126-008-0194-2
dc.description.abstract

The Pueblo Viejo deposit (production to 1996:166 t Au, 760 t Ag) is located in the Dominican Republic on the Caribbean island of Hispaniola and ranks as one of the largest high-sulfidation/acid-sulfate epithermal deposits (reserves in 2007: 635 t Au, 3,648 t Ag). One of the advanced argillic ore bodies is cut by an inter-mineral andesite porphyry dike, which is altered to a retrograde chlorite-illite assemblage but overprinted by late-stage quartz-pyrite-sphalerite veins and associated low-grade Au, Ag, Zn, Cd, Hg, In, As, Se, and Te mineralization. The precise TIMS U-Pb age (109.6±0.6 Ma) of the youngest zircon population in this dike confirms that the deposit is part of the Early Cretaceous Los Ranchos intraoceanic island arc. Intrusion-related gold-sulfide mineralization took place during late andesite-dacite volcanism within a thick pile (>200 m) of carbonaceous sand- and siltstones deposited in a restricted marine basin.The high-level deposit was shielded from erosion after burial under a late Albian (109-100 Ma) ophiolite complex (8 km thick), which was in turn covered by the volcano-sedimentary successions (>4 km) of a Late Cretaceous-Early Tertiary calc-akaline magmatic arc. Estimates of stratigraphic thickness and published alunite, illite, and feldspar K-Ar ages and closure temperatures (alunite 270±20C, illite 260±30C, K-feldspar 150C) indicate a burial depth of about 12 km at 80 Ma. During peak burial metamorphism (300C and 300 MPa), the alteration assemblage kaolinite + quartz in the deposit dehydrated to pyrophyllite. Temperature-time relations imply that the Los Ranchos terrane then cooled at a rate of 3-4C/Ma during slow uplift and erosion.

dc.publisherSpringer
dc.subjectU-Pb age
dc.subjectEpithermal
dc.subjectPueblo Viejo
dc.subjectCaribbean
dc.subjectDominican Republic
dc.subjectGold
dc.subjectIsland arc
dc.titleChronology of the Pueblo Viejo epithermal gold-silver deposit, Dominican Republic: formation in an Early Cretaceous intra-oceanic island arc and burial under ophiolite.
dc.typeJournal Article
dcterms.source.volume43
dcterms.source.startPage873
dcterms.source.endPage889
dcterms.source.issn00264598
dcterms.source.titleMineralium Deposita
curtin.note

The original publication is available at: http://www.springerlink.com

curtin.departmentWASM - Western Australian School of Mines
curtin.accessStatusFulltext not available


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