CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA
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概要
- 論文の詳細を見る
Ultramafic to mafic cumulate inclusions in Late Cenozoic basanite at Turtle Rock off Ross Island, Antarctica, were used to propose a well-defined compositional variation of the constituent minerals. The Turtle Rock cumulate suite (dunite-wehrlite-clinopyroxenite-gabbro), composed of Fe-rich olivine, clinopyroxene, kaersutitic amphibole, plagioclase and Ti-Fe oxide minerals, has undeformed and unmetasomatized igneous cumulate textures. All the ferromagnesian minerals are Fe-rich (100Mg/(Mg+Fe)=87-60). Clinopyroxenes are dominant in the cumulates and are always Fe-, Ti-, and Al-rich fassaitic augites, of which compositional range is separated from that of the upper mantle clinopyroxenes. Kaersutitic amphibole, varying continuously from Ti-pargasite to kaersutite, has a chemical composition typical of amphibole found in subcontinental cumulate xenoliths.
- 国立極地研究所の論文
著者
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Shibuya Kazuo
National Institute of Polar Research, Sokendai, Midori-cho 10-3, Tachikawa-city, Tokyo 190-8518, Jap
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Shibuya Kazuo
National Inst. Of Polar Res. And Graduate Univ. For Advanced Studies (sokendai) 1-9-10 Kaga Itabashi
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KAMINUMA Katsutada
National Institute of Polar Research
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NIIDA Kiyoaki
Department of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
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Niida Kiyoaki
Department Of Earth And Planetary Sciences Graduate School Of Science Hokkaido University
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Niida Kiyoaki
Department Of Geology And Mineralogy Faculty Of Science Hokkaido University
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