Dissecting the Re-Os molybdenite geochronometer
Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS 2 ), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium. Understanding the distribution of parent 187 Re and radiogenic daughter 187 Os isotopes in molybdenite is crit...
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| creator | Barra, Fernando Deditius, Artur Reich, Martin Kilburn, Matt R. Guagliardo, Paul Roberts, Malcolm P. |
| description | Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS
2
), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium. Understanding the distribution of parent
187
Re and radiogenic daughter
187
Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS
2
grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of
185,187
Re and
192
Os isotopes in MoS
2
, and that both
187
Re and
187
Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. Our study opens new avenues to explore the effects of isotope nuggeting in geochronometers. |
| doi_str_mv | 10.1038/s41598-017-16380-8 |
| format | Article |
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2
), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium. Understanding the distribution of parent
187
Re and radiogenic daughter
187
Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS
2
grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of
185,187
Re and
192
Os isotopes in MoS
2
, and that both
187
Re and
187
Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. Our study opens new avenues to explore the effects of isotope nuggeting in geochronometers.</description><identifier>ISSN: 2045-2322</identifier><identifier>EISSN: 2045-2322</identifier><identifier>DOI: 10.1038/s41598-017-16380-8</identifier><identifier>PMID: 29167505</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>704/2151/209 ; 704/2151/330 ; Electron microprobe ; Humanities and Social Sciences ; Isotopes ; Mass spectrometry ; Mass spectroscopy ; Mineralization ; Molybdenite ; Molybdenum ; multidisciplinary ; Nanoparticles ; Osmium ; Rhenium ; Science ; Science (multidisciplinary)</subject><ispartof>Scientific reports, 2017-11, Vol.7 (1), p.16054-7, Article 16054</ispartof><rights>The Author(s) 2017</rights><rights>2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c474t-8878648f66149ed51403bd766370e12bb5e096df9a77abb3c83efeb945ef2a073</citedby><cites>FETCH-LOGICAL-c474t-8878648f66149ed51403bd766370e12bb5e096df9a77abb3c83efeb945ef2a073</cites><orcidid>0000-0002-1858-8485</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5700062/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC5700062/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,27901,27902,41096,42165,51551,53766,53768</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/29167505$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Barra, Fernando</creatorcontrib><creatorcontrib>Deditius, Artur</creatorcontrib><creatorcontrib>Reich, Martin</creatorcontrib><creatorcontrib>Kilburn, Matt R.</creatorcontrib><creatorcontrib>Guagliardo, Paul</creatorcontrib><creatorcontrib>Roberts, Malcolm P.</creatorcontrib><title>Dissecting the Re-Os molybdenite geochronometer</title><title>Scientific reports</title><addtitle>Sci Rep</addtitle><addtitle>Sci Rep</addtitle><description>Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS
2
), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium. Understanding the distribution of parent
187
Re and radiogenic daughter
187
Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS
2
grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of
185,187
Re and
192
Os isotopes in MoS
2
, and that both
187
Re and
187
Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. 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Deditius, Artur ; Reich, Martin ; Kilburn, Matt R. ; Guagliardo, Paul ; Roberts, Malcolm P.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c474t-8878648f66149ed51403bd766370e12bb5e096df9a77abb3c83efeb945ef2a073</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>704/2151/209</topic><topic>704/2151/330</topic><topic>Electron microprobe</topic><topic>Humanities and Social Sciences</topic><topic>Isotopes</topic><topic>Mass spectrometry</topic><topic>Mass spectroscopy</topic><topic>Mineralization</topic><topic>Molybdenite</topic><topic>Molybdenum</topic><topic>multidisciplinary</topic><topic>Nanoparticles</topic><topic>Osmium</topic><topic>Rhenium</topic><topic>Science</topic><topic>Science (multidisciplinary)</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Barra, Fernando</creatorcontrib><creatorcontrib>Deditius, Artur</creatorcontrib><creatorcontrib>Reich, Martin</creatorcontrib><creatorcontrib>Kilburn, Matt R.</creatorcontrib><creatorcontrib>Guagliardo, Paul</creatorcontrib><creatorcontrib>Roberts, Malcolm P.</creatorcontrib><collection>Springer Nature OA Free Journals</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Health & Medical Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Biology Database (Alumni Edition)</collection><collection>Medical Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>Hospital Premium Collection</collection><collection>Hospital Premium Collection (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>Biological Science Collection</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Health Research Premium Collection</collection><collection>Health Research Premium Collection (Alumni)</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>ProQuest Biological Science Collection</collection><collection>Health & Medical Collection (Alumni Edition)</collection><collection>Medical Database</collection><collection>Science Database</collection><collection>Biological Science Database</collection><collection>Publicly Available Content Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central Basic</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Scientific reports</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Barra, Fernando</au><au>Deditius, Artur</au><au>Reich, Martin</au><au>Kilburn, Matt R.</au><au>Guagliardo, Paul</au><au>Roberts, Malcolm P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Dissecting the Re-Os molybdenite geochronometer</atitle><jtitle>Scientific reports</jtitle><stitle>Sci Rep</stitle><addtitle>Sci Rep</addtitle><date>2017-11-22</date><risdate>2017</risdate><volume>7</volume><issue>1</issue><spage>16054</spage><epage>7</epage><pages>16054-7</pages><artnum>16054</artnum><issn>2045-2322</issn><eissn>2045-2322</eissn><abstract>Rhenium and osmium isotopes have been used for decades to date the formation of molybdenite (MoS
2
), a common mineral in ore deposits and the world’s main source of molybdenum and rhenium. Understanding the distribution of parent
187
Re and radiogenic daughter
187
Os isotopes in molybdenite is critical in interpreting isotopic measurements because it can compromise the accurate determination and interpretation of mineralization ages. In order to resolve the controls on the distribution of these elements, chemical and isotope mapping of MoS
2
grains from representative porphyry copper-molybdenum deposits were performed using electron microprobe and nano-scale secondary ion mass spectrometry. Our results show a heterogeneous distribution of
185,187
Re and
192
Os isotopes in MoS
2
, and that both
187
Re and
187
Os isotopes are not decoupled as previously thought. We conclude that Re and Os are structurally bound or present as nanoparticles in or next to molybdenite grains, recording a complex formation history and hindering the use of microbeam techniques for Re-Os molybdenite dating. Our study opens new avenues to explore the effects of isotope nuggeting in geochronometers.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>29167505</pmid><doi>10.1038/s41598-017-16380-8</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0002-1858-8485</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 704/2151/209 704/2151/330 Electron microprobe Humanities and Social Sciences Isotopes Mass spectrometry Mass spectroscopy Mineralization Molybdenite Molybdenum multidisciplinary Nanoparticles Osmium Rhenium Science Science (multidisciplinary) |
| title | Dissecting the Re-Os molybdenite geochronometer |
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