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Oxygen isotope record of magmatic evolution of alkaline volcanic rocks at The Pleiades, northern Victoria Land, Antarctica

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dc.contributor.authorKim, Nak Kyu-
dc.contributor.authorLee, Mi Jung-
dc.contributor.authorLee, Jong Ik-
dc.contributor.authorKim, Jihyuk-
dc.date.accessioned2022-07-07T07:16:57Z-
dc.date.available2022-07-07T07:16:57Z-
dc.date.issued2021-12-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/13614-
dc.description.abstractOxygen isotopes are used to examine the well-documented magmatic evolution of alkaline volcanic rocks at The Pleiades in northern Victoria Land (NVL), Antarctica. Oxygen isotopes were measured in olivine, clinopyroxene, and plagioclase phenocrysts to better understand the origin and evolution of the sodic and potassic differentiation lineages. The volcanic rocks at The Pleiades evolved from a parental basanite by fractional crystallization in crustal magma chambers. Olivine which crystallizes first in the mafic magmas provides the initial oxygen isotope composition of the magmatic lineages. The delta O-18(OL) values for the mafic lavas in the sodic lineage are lower than the potassic lineage. The primary melt derived from the metasomatized lithospheric mantle may have consumed a low-delta O-18 amphibole metasome. Subsequently, the melt would have evolved to the normal-delta O-18 potassic lineage magma by a large contribution from surrounding peridotite. In contrast, the sodic lineage magma might preserve low-delta O-18 characteristics because of insufficient reaction with the surrounding mantle peridotite. Intermediate rocks of the potassic lineage exhibit a wide variation in their oxygen isotope compositions and it deviates from the theoretical normal-delta O-18 trend. Hence, variable delta O-18(OL) values of the intermediate rocks suggest that high-delta O-18 recorded in olivine could be reconciled with an assimilation of crustal rocks in NVL, and hydrothermally altered material may have contributed to low-delta O-18 signature of the olivines.en_US
dc.languageEnglishen_US
dc.language.isoenen_US
dc.subjectGeologyen_US
dc.subject.classificationJang Bogo Stationen_US
dc.titleOxygen isotope record of magmatic evolution of alkaline volcanic rocks at The Pleiades, northern Victoria Land, Antarcticaen_US
dc.title.alternative남극 북빅토리아랜드 플레이아데스 알칼리 화산암의 산소동위원소 특성en_US
dc.typeArticleen_US
dc.identifier.bibliographicCitationKim, Nak Kyu, et al. 2021. "Oxygen isotope record of magmatic evolution of alkaline volcanic rocks at The Pleiades, northern Victoria Land, Antarctica". <em>GEOSCIENCES JOURNAL</em>, 25(6): 787-797.-
dc.citation.titleGEOSCIENCES JOURNALen_US
dc.citation.volume25en_US
dc.citation.number6en_US
dc.identifier.doi10.1007/s12303-021-0002-x-
dc.citation.startPage787en_US
dc.citation.endPage797en_US
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2019:65.5en_US
dc.subject.keywordThe Pleiades volcanic complexen_US
dc.subject.keywordMcMurdo Volcanic Groupen_US
dc.subject.keywordAntarcticaen_US
dc.subject.keywordoxygen isotopeen_US
dc.subject.keywordAFC processen_US
dc.identifier.localId2021-0045-
dc.identifier.scopusid2-s2.0-85102684176-
dc.identifier.wosid000628469000001-
Appears in Collections  
2021-2021, Mantle dynamics and tectonic evolutions of Zealandia-Antarctic domain (21-21) / Park, Sung Hyun (PE21050)
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