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Water-susceptible primordial noble gas components in less-altered CR chondrites: A possible link to cometary materials

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dc.contributor.authorObase, Tomoya-
dc.contributor.authorNakashima, Daisuke-
dc.contributor.authorChoi, Jisu-
dc.contributor.authorEnokido, Yuma-
dc.contributor.authorMatsumoto, Megumi-
dc.contributor.authorNakamura, Tomoki-
dc.date.accessioned2021-11-29T05:01:19Z-
dc.date.available2021-11-29T05:01:19Z-
dc.date.issued2021-11-01-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/13016-
dc.description.abstractWe report detailed characterizations of the petrology, mineralogy, and noble gas signatures of Renazzo-type (CR) chondrites EET 92048, MIL 090657, NWA 801, and hydrothermally treated MIL 090657 samples to investigate primordial noble gases hosted by water-susceptible materials in aqueously less-altered CR chondrites. The noble gases were extracted by a stepwise heating method. The hydrothermal treatment on MIL 090657 resulted in the alteration of amorphous silicates in the matrix and the removal of large amounts of He and Ne that were released at low temperature from the untreated sample. The Ar-36/Xe-132 ratios in EET 92048 and MIL 090657 are similar to 5 times higher than that of the Q noble gas component, although both meteorites do not show any evidence for solar wind noble gases. The analyses revealed that aqueously less-altered CR chondrites contain two distinct primordial noble gas components hosted by water-susceptible materials: an isotopically Q-like Ne-rich component and an Ar-rich component. The characteristics of the Q-like Ne-rich component are consistent with those of Q-like Ne in cometary materials. We propose that the CR chondrites formed at a greater heliocentric distance and share similar materials hosting the Q-like Ne-rich component with comets. The presence of the Ar-rich component in the CR chondrites, as well as in ordinary chondrites and other anhydrous carbonaceous chondrites, provides evidence of the global distribution of the Ar-rich carriers in the ordinary and carbonaceous chondrite forming regions. (C) 2021 Elsevier Ltd. All rights reserved.en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.subjectGeochemistry & Geophysicsen_US
dc.subject.classification해당사항없음en_US
dc.titleWater-susceptible primordial noble gas components in less-altered CR chondrites: A possible link to cometary materialsen_US
dc.title.alternativeCR 콘드라이트의 원시 불활성기체 성분: 혜성 구성물질과의 연관성en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationTomoya Obase, et al. 2021. "Water-susceptible primordial noble gas components in less-altered CR chondrites: A possible link to cometary materials". <em>GEOCHIMICA ET COSMOCHIMICA ACTA</em>, 312(1): 75-105.en_US
dc.citation.titleGEOCHIMICA ET COSMOCHIMICA ACTAen_US
dc.citation.volume312en_US
dc.identifier.doi10.1016/j.gca.2021.08.012-
dc.citation.startPage75en_US
dc.citation.endPage105en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2019:10.588en_US
dc.subject.keywordAqueous alterationen_US
dc.subject.keywordCR chondritesen_US
dc.subject.keywordNoble gasesen_US
dc.subject.keywordPrimitive meteoritesen_US
dc.identifier.localId2021-0168-
dc.identifier.scopusid2-s2.0-85113751553-
dc.identifier.wosid000703167600005-
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