Plume-subduction interaction forms large auriferous provinces
Identifieur interne : 000602 ( Main/Exploration ); précédent : 000601; suivant : 000603Plume-subduction interaction forms large auriferous provinces
Auteurs : Santiago Tassara [Chili] ; José M. González-Jiménez [Chili, Espagne] ; Martin Reich [Chili] ; Manuel E. Schilling [Chili] ; Diego Morata [Chili] ; Graham Begg ; Edward Saunders ; William L. Griffin ; Suzanne Y. O Eilly ; Michel Grégoire [France] ; Fernando Barra [Chili] ; Alexandre Corgne [Chili]Source :
- Nature Communications [ 2041-1723 ] ; 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.
Url:
DOI: 10.1038/s41467-017-00821-z
PubMed: 29018198
PubMed Central: 5634996
Affiliations:
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Griffin</name><affiliation><nlm:aff id="Aff6"><institution-wrap><institution-id institution-id-type="ISNI">0000 0001 2158 5405</institution-id><institution-id institution-id-type="GRID">grid.1004.5</institution-id><institution>ARC Centre of Excellence for Core to Crust Fluid Systems/GEMOC,</institution><institution>Macquarie University,</institution></institution-wrap>Sydney, NSW 2109 Australia</nlm:aff><wicri:noCountry code="subfield">NSW 2109 Australia</wicri:noCountry></affiliation></author><author><name sortKey="O Eilly, Suzanne Y" sort="O Eilly, Suzanne Y" uniqKey="O Eilly S" first="Suzanne Y." last="O Eilly">Suzanne Y. O Eilly</name><affiliation><nlm:aff id="Aff6"><institution-wrap><institution-id institution-id-type="ISNI">0000 0001 2158 5405</institution-id><institution-id institution-id-type="GRID">grid.1004.5</institution-id><institution>ARC Centre of Excellence for Core to Crust Fluid Systems/GEMOC,</institution><institution>Macquarie University,</institution></institution-wrap>Sydney, NSW 2109 Australia</nlm:aff><wicri:noCountry code="subfield">NSW 2109 Australia</wicri:noCountry></affiliation></author><author><name sortKey="Gregoire, Michel" sort="Gregoire, Michel" uniqKey="Gregoire M" first="Michel" last="Grégoire">Michel Grégoire</name><affiliation wicri:level="1"><nlm:aff id="Aff7"><institution-wrap><institution-id institution-id-type="ISNI">0000 0001 2353 1689</institution-id><institution-id institution-id-type="GRID">grid.11417.32</institution-id><institution>GET, CNRS-CNES-IRD-UPS,</institution><institution>Toulouse University,</institution></institution-wrap>14 Avenue Edouard Belin, 31200 Toulouse, France</nlm:aff><country xml:lang="fr">France</country><wicri:regionArea>14 Avenue Edouard Belin, 31200 Toulouse</wicri:regionArea><wicri:noRegion>31200 Toulouse</wicri:noRegion><placeName><settlement type="city">Toulouse</settlement><region type="region" nuts="2">Occitanie (région administrative)</region><region type="old region" nuts="2">Midi-Pyrénées</region></placeName></affiliation></author><author><name sortKey="Barra, Fernando" sort="Barra, Fernando" uniqKey="Barra F" first="Fernando" last="Barra">Fernando Barra</name><affiliation wicri:level="1"><nlm:aff id="Aff1"><institution-wrap><institution-id institution-id-type="ISNI">0000 0004 0385 4466</institution-id><institution-id institution-id-type="GRID">grid.443909.3</institution-id><institution>Department of Geology and Andean Geothermal Center of Excellence (CEGA), FCFM,</institution><institution>Universidad de Chile,</institution></institution-wrap>Plaza Ercilla 803, Santiago, 8370450 Chile</nlm:aff><country xml:lang="fr">Chili</country><wicri:regionArea>Plaza Ercilla 803, Santiago</wicri:regionArea><wicri:noRegion>Santiago</wicri:noRegion></affiliation></author><author><name sortKey="Corgne, Alexandre" sort="Corgne, Alexandre" uniqKey="Corgne A" first="Alexandre" last="Corgne">Alexandre Corgne</name><affiliation wicri:level="1"><nlm:aff id="Aff3"><institution-wrap><institution-id institution-id-type="ISNI">0000 0004 0487 459X</institution-id><institution-id institution-id-type="GRID">grid.7119.e</institution-id><institution>Instituto de Ciencias de la Tierra, Facultad de Ciencias,</institution><institution>Universidad Austral de Chile,</institution></institution-wrap>Valdivia, 5090000 Chile</nlm:aff><country xml:lang="fr">Chili</country><wicri:regionArea>Valdivia</wicri:regionArea></affiliation></author></analytic><series><title level="j">Nature Communications</title><idno type="eISSN">2041-1723</idno><imprint><date when="2017">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p id="Par1">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.</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Mcinnes, Bia" uniqKey="Mcinnes B">BIA McInnes</name></author><author><name sortKey="Mcbridge, Js" uniqKey="Mcbridge J">JS McBridge</name></author><author><name sortKey="Evans, Nj" uniqKey="Evans N">NJ Evans</name></author><author><name sortKey="Lambert, Dd" uniqKey="Lambert D">DD Lambert</name></author><author><name sortKey="Andre, As" uniqKey="Andre A">AS Andre</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Sillitoe, Rh" uniqKey="Sillitoe R">RH Sillitoe</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Begg, Gc" uniqKey="Begg G">GC 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O’Reilly</name></author></analytic></biblStruct></listBibl></div1></back></TEI><affiliations><list><country><li>Chili</li><li>Espagne</li><li>France</li></country><region><li>Midi-Pyrénées</li><li>Occitanie (région administrative)</li></region><settlement><li>Toulouse</li></settlement></list><tree><noCountry><name sortKey="Begg, Graham" sort="Begg, Graham" uniqKey="Begg G" first="Graham" last="Begg">Graham Begg</name><name sortKey="Griffin, William L" sort="Griffin, William L" uniqKey="Griffin W" first="William L." last="Griffin">William L. Griffin</name><name sortKey="O Eilly, Suzanne Y" sort="O Eilly, Suzanne Y" uniqKey="O Eilly S" first="Suzanne Y." last="O Eilly">Suzanne Y. O Eilly</name><name sortKey="Saunders, Edward" sort="Saunders, Edward" uniqKey="Saunders E" first="Edward" last="Saunders">Edward Saunders</name></noCountry><country name="Chili"><noRegion><name sortKey="Tassara, Santiago" sort="Tassara, Santiago" uniqKey="Tassara S" first="Santiago" last="Tassara">Santiago Tassara</name></noRegion><name sortKey="Barra, Fernando" sort="Barra, Fernando" uniqKey="Barra F" first="Fernando" last="Barra">Fernando Barra</name><name sortKey="Corgne, Alexandre" sort="Corgne, Alexandre" uniqKey="Corgne A" first="Alexandre" last="Corgne">Alexandre Corgne</name><name sortKey="Gonzalez Jimenez, Jose M" sort="Gonzalez Jimenez, Jose M" uniqKey="Gonzalez Jimenez J" first="José M." last="González-Jiménez">José M. González-Jiménez</name><name sortKey="Morata, Diego" sort="Morata, Diego" uniqKey="Morata D" first="Diego" last="Morata">Diego Morata</name><name sortKey="Reich, Martin" sort="Reich, Martin" uniqKey="Reich M" first="Martin" last="Reich">Martin Reich</name><name sortKey="Schilling, Manuel E" sort="Schilling, Manuel E" uniqKey="Schilling M" first="Manuel E." last="Schilling">Manuel E. Schilling</name></country><country name="Espagne"><noRegion><name sortKey="Gonzalez Jimenez, Jose M" sort="Gonzalez Jimenez, Jose M" uniqKey="Gonzalez Jimenez J" first="José M." last="González-Jiménez">José M. González-Jiménez</name></noRegion></country><country name="France"><region name="Occitanie (région administrative)"><name sortKey="Gregoire, Michel" sort="Gregoire, Michel" uniqKey="Gregoire M" first="Michel" last="Grégoire">Michel Grégoire</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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