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The A-type Pirrit Hills Granite, West Antarctica: an example of magmatism associated with the Mesozoic break-up of the Gondwana supercontinent

Cited 7 time in wos
Cited 7 time in scopus

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dc.contributor.authorLee, Hyo Min-
dc.contributor.authorChoi, Seok Won-
dc.contributor.authorKim, Jeongmin-
dc.contributor.authorLee, Mi Jung-
dc.contributor.authorLee, Jong Ik-
dc.coverage.spatialWest Antarctica-
dc.date.accessioned2018-03-20T13:44:31Z-
dc.date.available2018-03-20T13:44:31Z-
dc.date.issued2012-
dc.identifier.urihttps://repository.kopri.re.kr/handle/201206/6197-
dc.description.abstractThe Pirrit Hills granite occurs as an isolated pluton in the Ellsworth-Whitmore Mountains block, which is the center of five blocks in the present configuration. The granite consists of quartz, perthitic alkali feldspar, and plagioclase with minor amounts of interstitial biotite and muscovite. The granite is a highly homogeneous, strongly fractionated, and mildly peraluminous granite and belongs to A-type granites with A2-type characteristics, suggesting its generation in an anorogenic environment. The strong enrichment of HREE and significant negative Eu anomalies suggest that the granitic magma was produced by a small degree of partial melting of a garnet granulitic source in the unusually hot lower crust. A weighted mean 206Pb/238U age of zircons is 164.5±2.3 Ma (MSWD=1.3), which is 8 to 9 Mys younger than a former Rb-Sr whole rock age (173±3 Ma), and corresponds to the first rifting stage of the break-up of Gondwana (at 165 Ma). We suggest this age to be the emplacement age of the Pirrit Hills granite. The A-type Pirrit Hills granite was emplaced in the Middle Jurassic accompanying crustal thinning due to the break-up of Gondwana. with minor amounts of interstitial biotite and muscovite. The granite is a highly homogeneous, strongly fractionated, and mildly peraluminous granite and belongs to A-type granites with A2-type characteristics, suggesting its generation in an anorogenic environment. The strong enrichment of HREE and significant negative Eu anomalies suggest that the granitic magma was produced by a small degree of partial melting of a garnet granulitic source in the unusually hot lower crust. A weighted mean 206Pb/238U age of zircons is 164.5±2.3 Ma (MSWD=1.3), which is 8 to 9 Mys younger than a former Rb-Sr whole rock age (173±3 Ma), and corresponds to the first rifting stage of the break-up of Gondwana (at 165 Ma). We suggest this age to be the emplacement age of the Pirrit Hills granite. The A-type Pirrit-
dc.languageEnglish-
dc.publisher대한지질학회/대한지질학회-
dc.subjectGeology-
dc.titleThe A-type Pirrit Hills Granite, West Antarctica: an example of magmatism associated with the Mesozoic break-up of the Gondwana supercontinent-
dc.title.alternative서남극 피릿힐 A-type 화강암: 곤드와나 초대륙 분리와 관련된 화성활동-
dc.typeArticle-
dc.identifier.bibliographicCitationLee, Hyo Min, et al. 2012. "The A-type Pirrit Hills Granite, West Antarctica: an example of magmatism associated with the Mesozoic break-up of the Gondwana supercontinent". <em>GEOSCIENCES JOURNAL</em>, 16(4): 421-433.-
dc.citation.titleGEOSCIENCES JOURNAL-
dc.citation.volume16-
dc.citation.number4-
dc.identifier.doi10.1007/s12303-012-0041-4-
dc.citation.startPage421-
dc.citation.endPage433-
dc.description.articleClassificationSCIE-
dc.description.jcrRateJCR 2010:83.8323353293413-
dc.subject.keywordA-type granite-
dc.subject.keywordGondwana supercontinent-
dc.subject.keywordPirrit Hills-
dc.subject.keywordWest Antarctica-
dc.subject.keywordcontinental break-up-
dc.identifier.localId2012-0537-
dc.identifier.scopusid2-s2.0-84871301334-
dc.identifier.wosid000312630800005-
Appears in Collections  
2012-2013, Korea Curation of Antarctic Meteorites and Evolution of Planetary Materials (12-13) / Lee, Jong Ik (PE13060, PE12060)
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