| 概要 |
Ogusoyama, situated about 15km southwest of Hamada city, Shimane Prefecture, is a famous locality for the occurrence of limburgite. The phenocryst clinopyroxenes show remarkable compositional zoning m...ade up of inner aluminian augite and of outer titan-augite. In rare cases, however, three zones are recognized in some crystals, which made up of chrominian diopside core, of aluminian augite intermadiate zone and of titan-augite outer margin. Optical properties and chemical compositions of constituent minerals in limburgite as well as bulk chemical compositions of the host rocks are presented. The optical and chemical data suggested that most megacrysts in limburgite are formed from some basaltic magma near uppermost mantle or lowest crust, but they are no more in equilibrum with limburgite magma at volcanic condition.続きを見る
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Mendeley出力
