Effect of Jadeite-content on the Garnet-clinopyroxene Geothermometer for an Ultrahigh-pressure Eclogite Complex
スポンサーリンク
概要
- 論文の詳細を見る
The temperature estimation using garnet (Grt)-clinopyroxene (Cpx) Fe-Mg exchange geothermometers was carried out for an ultrahigh-pressure (UHP) eclogite complex in the Su-Lu terrain, eastern China. The obtained temperatures (from 600 to 900°C at 30kbar) and KD (=(Fe/Mg)Grt/(Fe/Mg)Cpx=8-13) show a wide variation and they are clearly dependent upon the jadeite-content (Xjd) of Cpx. It mainly owes to a positive correlation between fe#(=Fe2+/(Fe2++Mg)) and Xjd in Cpx. Such a phenomenon was known for Cpx with Xjd higher than 0.7 in the quartz-eclogite facies rocks, but it is more clearly recognized from omphacite to jadeite in the coesite-bearing UHP eclogite. We may need a new correction factor on Xjd to estimate the equilibrated T of UHP rocks.
著者
-
HIRAJIMA Takao
Department of Geology and Mineralogy, Graduate School of Science, Kyoto University
-
Hirajima Takao
Department Of Geology And Mineralogy Division Of Earth And Planetary Sciences Graduate School Of Sci
関連論文
- The coexistence of jadeite and omphacite in an eclogite-facies metaquartz diorite from the southern Sesia Zone, Western Alps, Italy
- Sr-sulphate and associated minerals found from kyanite-bearing eclogite in the Moldanubian Zone of the Bohemian Massif, Czech Republic
- Pseudosection analysis for talc-Na pyroxene-bearing piemontite-quartz schist in the Sanbagawa Belt, Japan
- Analysis of Mn-bearing lawsonite occurring in meta-siliceous rocks in Hakoishi serpentinite melange of Kurosegawa Belt, Central Kyushu, Japan
- Pseudosection analysis for the Sanbagawa pelitic schist and its implication to the thermal structure of high-pressure intermediate type of metamorphism
- Chemical characteristics and trapping P-T conditions of fluid inclusions in quartz veins from the Sanbagawa metamorphic belt, SW Japan
- Preservation and retrogression of ultra high pressure (UHP) rocks: case studies of UHP metagranitoids in Western Alps and Su-Lu region
- Equilibration temperature of the Kobe meteorite
- Age determination of thorianite in phlogopite-bearing spinel-garnet peridotite in the Gfohl Unit, Moldanubian Zone of the Bohemian Massif
- An ultra-high-pressure metamorphic condition and isothermal decompression path obtained from a garnet-pyroxenite in the Horni Bory granulite of the Bohemian Massif
- Fluid inclusions with high Li/B ratio in a quartz vein from the Besshi area of the Sambagawa metamorphic belt : implications for deep geofluid evolution
- Effect of Jadeite-content on the Garnet-clinopyroxene Geothermometer for an Ultrahigh-pressure Eclogite Complex
- Preiswerkite and hogbomite within garnets of Aktyuz eclogite, Northern Tien Shan, Kyrgyzstan
- Finding of prehnite-pumpellyite facies metabasites from the Kurosegawa belt in Yatsushiro area, Kyushu, Japan
- Annular fluid inclusions from a quartz vein intercalated with metapelites from the Besshi area of the Sanbagawa belt, SW Japan
- Analysis of Mn-bearing lawsonite occurring in meta-siliceous rocks in Hakoishi serpentinite melange of Kurosegawa Belt, Central Kyushu, Japan
- Eclogitized Metagranitoid from the Su-Lu Ultra-High Pressure (UHP) Province, Eastern China.