A rapid change in magma plumbing taps porphyry copper deposit-forming magmas
dc.contributor.author | Carter, LC | |
dc.contributor.author | Tapster, SR | |
dc.contributor.author | Williamson, BJ | |
dc.contributor.author | Buret, Y | |
dc.contributor.author | Selby, D | |
dc.contributor.author | Rollinson, GK | |
dc.contributor.author | Millar, I | |
dc.contributor.author | Parvaz, DB | |
dc.date.accessioned | 2022-10-17T09:41:46Z | |
dc.date.issued | 2022-10-14 | |
dc.date.updated | 2022-10-15T11:52:40Z | |
dc.description.abstract | Porphyry-type deposits are a vital source of green technology metals such as copper and molybdenum. They typically form in subduction-related settings from large, long-lived magmatic systems. The most widely accepted model for their formation requires that mantle-derived magmas undergo an increase in volatiles and ore-forming constituents in mid- to lower crustal reservoirs over millions of years, however, this is mostly based on observations from shallow, sporadically exposed parts of porphyry systems. To examine this paradigm, we have evaluated the timeframe and geochemical signatures of magmatism in a ~ 8 km palaeodepth cross-section through plutonic and volcanic rocks of the classic Yerington magmatic system, Nevada. We show that the magmas in the upper parts of the system (< 8 km) underwent a major and rapid change in chemistry over a period of < 200 kyrs that is coincident with the initiation of ore formation. We attribute this change to a shift from extraction of quartz monzodiorite and quartz monzonite magmas evolving in mid-crustal reservoirs, and that had relatively poor ore-forming potential, to extraction of volatile-rich granitic magmas from greater (~ 30 km) depths. As the granites crystallised, late stage melts were intruded through the carapace as aplite dykes which contain traceable expressions of the porphyry deposit-forming fluids. The rapid nature of the shift in ore-forming potential narrows the temporal-geochemical footprint of magmas associated with porphyry mineralisation and provides new constraints for exploration models. | en_GB |
dc.description.sponsorship | Natural Environment Research Council (NERC) | en_GB |
dc.description.sponsorship | Natural History Museum, London | en_GB |
dc.description.sponsorship | British Geological Survey | en_GB |
dc.description.sponsorship | Society of Economic Geologists Foundation, Hugh McKinstry Fund | en_GB |
dc.identifier.citation | Vol. 12, article 17272 | en_GB |
dc.identifier.doi | https://doi.org/10.1038/s41598-022-20158-y | |
dc.identifier.grantnumber | NE/L002434/1 | en_GB |
dc.identifier.grantnumber | IP-1876-1118 | en_GB |
dc.identifier.grantnumber | NE/P017452/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/131287 | |
dc.language.iso | en | en_GB |
dc.publisher | Nature Research | en_GB |
dc.rights | © The Author(s) 2022. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ | en_GB |
dc.title | A rapid change in magma plumbing taps porphyry copper deposit-forming magmas | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2022-10-17T09:41:46Z | |
exeter.article-number | 17272 | |
dc.description | This is the final version. Available on open access from Nature Research via the DOI in this record | en_GB |
dc.description | Data availability: All data supporting the findings of this study are available within the paper and its Supplementary files. | en_GB |
dc.identifier.eissn | 2045-2322 | |
dc.identifier.journal | Scientific Reports | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2022-09-09 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2022-10-14 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2022-10-17T08:52:19Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2022-10-17T09:41:51Z | |
refterms.panel | B | en_GB |
refterms.dateFirstOnline | 2022-10-14 |
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