Universidad de Granada Digibug
 

Repositorio Institucional de la Universidad de Granada >
1.-Investigación >
Departamentos, Grupos de Investigación e Institutos >
Departamento de Mineralogía y Petrología >
DMP - Artículos >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/47922

Title: Plume-subduction interaction forms large auriferous provinces
Authors: Tassara, Santiago
González-Jiménez, José María
Reich, Martin
Schilling, Manuel E.
Morata, Diego
Begg, Graham
Saunders, Edward
Griffin, William L.
O'Reilly, Suzanne Y.
Grégoire, Michel
Barra, Fernando
Corgne, Alexandre
Issue Date: 10-Jan-2017
Abstract: Gold enrichment at the crustal or mantle source has been proposed as a key ingredient in the production of giant gold deposits and districts. However, the lithospheric-scale processes controlling gold endowment in a given metallogenic province remain unclear. Here we provide the first direct evidence of native gold in the mantle beneath the Deseado Massif in Patagonia that links an enriched mantle source to the occurrence of a large auriferous province in the overlying crust. A precursor stage of mantle refertilisation by plume-derived melts generated a gold-rich mantle source during the Early Jurassic. The interplay of this enriched mantle domain and subduction-related fluids released during the Middle-Late Jurassic resulted in optimal conditions to produce the ore-forming magmas that generated the gold deposits. Our study highlights that refertilisation of the subcontinental lithospheric mantle is a key factor in forming large metallogenic provinces in the Earth’s crust, thus providing an alternative view to current crust-related enrichment models.
Sponsorship: Funding for this study has been provided by Millennium Science Initiative through Millennium Nucleus for Metal Tracing along Subduction Grant NC130065. Additional support was provided by FONDAP project 15090013 ‘Centro de Excelencia en Geotermia de Los Andes, CEGA’, FONDECYT projects #11140005 and #1140780, and DID-UACh project #S-2015-52. Additional funding for LA-ICP-MS analyses of sulfides at Macquarie University was provided by RYC-2015-17596. Minerals Targeting International Pty Ltd is acknowledged for providing directions regarding suitable sample sites for gold-bearing xenoliths. S.T. thanks CONICYT 21170857 for providing support through a PhD scholarship.
Publisher: Nature Publishing Group
Keywords: Geodynamics
Geology
Mineralogy
Petrology
Metallogenic
Auriferous
URI: http://hdl.handle.net/10481/47922
ISSN: 2041-1723
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Tassara, S.; et al. Plume-subduction interaction forms large auriferous provinces. Nature Communications, 8: 843 (2017). [http://hdl.handle.net/10481/47922]
Appears in Collections:DMP - Artículos

Files in This Item:

File Description SizeFormat
Tassara_PlumeSubduction.pdf5.65 MBAdobe PDFView/Open
Recommend this item

This item is licensed under a Creative Commons License
Creative Commons

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! OpenAire compliant DSpace Software Copyright © 2002-2007 MIT and Hewlett-Packard - Feedback

© Universidad de Granada