Major and trace element zoning of euhedral garnet in high-grade (> 900 .DEG.C) mafic granulite from the Song Ma Suture zone, northern Vietnam
スポンサーリンク
概要
- 論文の詳細を見る
In this study, mafic granulite and related leucosomes from the Song Ma Suture zone in northern Vietnam were investigated. Euhedral garnet appears in both granulites and leucosomes, whereas the former is partly to mostly replaced by orthopyroxene + plagioclase symplectite. Most garnets occurring both in granulite and leucosome contain an Mg-rich and Ca-poor core as well as an Mg-poor and Ca-rich mantle. Garnets in leucosomes have an Mg-rich and Ca-poor thin rim. Amphibole + quartz association is observed only in the core and mantle and not in the rim and matrix. Garnet core is characterized by flat middle to heavy rare earth element (REE) patterns and depletion of light REEs. The rim also contains high concentrations of middle REEs, whereas light and heavy REEs are further depleted in comparison with the core. The REE patterns of the mantle are completely different from core and rim, which show considerable depletion in light to middle REEs and extreme enrichment in heavy REEs. The petrographical features and REE patterns of the associated mineral phases suggest that the complex chemical zonation of garnet might be formed by dehydration melting of amphibole and multiple recrystallization of garnet.
- 日本鉱物科学会の論文
著者
-
Adachi Tatsuro
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
-
Osanai Yasuhito
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
-
Nakano Nobuhiko
Division Of Earth Sciences Faculty Of Social And Cultural Studies Kyushu University
-
OSANAI Yasuhito
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
-
ADACHI Tatsuro
Division of Earth Sciences, Faculty of Social and Cultural Studies, Kyushu University
関連論文
- Titanium behavior in quartz during retrograde hydration: Occurrence of rutile exsolution and implications for metamorphic processes in the Sør Rondane Mountains, East Antarctica
- Decompression process of mafic granulite from eclogite to granulite facies under ultrahigh-temperature condition in the Kontum massif, central Vietnam
- Permo-Triassic ultrahigh-temperature metamorphism in the Kontum massif, central Vietnam
- Ultrahigh temperature sapphirine-osumilite and sapphirine-quartz granulites from Bunt Island in the Napier Complex, East Antarctica -Reconnaissance estimation of P-T evolution -
- Mineralogy of scapolite from Skallen in the Lutzow-Holm Bay region, East Antarctica
- Permo-Triassic Barrovian-type metamorphism in the ultrahigh-temperature Kontum Massif, central Vietnam : Constraints on continental collision tectonics in Southeast Asia
- Collision zone metamorphism in Vietnam and adjacent South-eastern Asia : Proposition for Trans Vietnam Orogenic Belt
- Sm-Nd garnet ages of retrograde garnet bearing granulites from Tonagh Island in the Napier Complex, East Antarctica: A preliminary study
- Isotopic equilibration ages for the Miyanohara tonalite from the Higo metamorphic belt in central Kyushu, Southwest Japan : Implications for the tectonic setting during the Triassic
- Ultrahigh temperature metamorphism and deep crustal processes : Introduction
- Fluid inclusions in an osumilite-bearing granulite from Bunt Island in the Archean Napier Complex, East Antarctica: implications for a decompressional P-T path?
- Carbonic fluid inclusions in ultrahigh-temperature metamorphic rocks from Tonagh Island in the Archean Napier Complex, East Antarctica: A preliminary report
- Major and trace element zoning of euhedral garnet in high-grade (>900℃) mafic granulite from the Song Ma Suture zone, northern Vietnam
- Osumilite and spinel + quartz from Sri Lanka : Implications for UHT conditions and retrograde P-T path
- Amphibolite-facies metamorphic rocks of the Mt. Tenzan area, northern Kyushu, Southwest Japan : Correlation with the Higo metamorphic rocks
- Gondwana to Asia - A history of continental growth and deep crustal processes : Introduction
- Textural varieties in the Indochinese metamorphic rocks : A key for understanding Asian tectonics
- Multiple-collision zones in the Sanjiang Region, SW China
- Resetting and closing codition of Rb-Sr whole-rock isochron system: some samples of metamorphic and granitic rocks from the Gondwana super-continent and Japan Arc
- Fluorine-rich calcic amphiboles in ultrahigh-temperature mafic granulite from Tonagh Island in the Napier Complex, East Antarctica: Preliminary report
- LREE-enriched mafic gneiss and meta-ultramafic rock from Tonagh Island in the Napier Complex, East Antarctica
- Petrography and geochemistry for mafic and ultramafic rocks from Tonagh Island in the Napier Complex, East Antarctica: A preliminary report
- Inferred ultrahigh-temperature metamorphism of amphibolitized olivine granulite from the Sor Rondane Mountains, East Antarctica
- U-Pb detrital zircon dating of pelitic schists and quartzite from the Kurosegawa Tectonic Zone, Southwest Japan
- EPMA U-Th-Pb monazite dating of metamorphic rocks from the Mogok Metamorphic Belt, central Myanmar
- Petrology, geochemistry, and origin of metamorphosed mafic rocks of the Trans Vietnam Orogenic Belt, Southeast Asia
- An early Paleozoic tectonothermal event in western Mongolia: Implications for regional extension of the Cambrian orogenic belt
- Metamorphic rocks from the Mongol-Altai ::A first report of Japan-Mongolia Joint Geological Research (2009-2013)
- Major and trace element zoning of euhedral garnet in high-grade (> 900 .DEG.C) mafic granulite from the Song Ma Suture zone, northern Vietnam
- An early Paleozoic tectonothermal event in western Mongolia : Implications for regional extension of the Cambrian orogenic belt
- Petrology, geochemistry, and origin of metamorphosed mafic rocks of the Trans Vietnam Orogenic Belt, Southeast Asia
- U-Pb detrital zircon dating of pelitic schists and quartzite from the Kurosegawa Tectonic Zone, Southwest Japan
- EPMA U-Th-Pb monazite dating of metamorphic rocks from the Mogok Metamorphic Belt, central Myanmar