@article{oai:nipr.repo.nii.ac.jp:00002563,
 author = {ニイダ, キヨアキ and NIIDA, Kiyoaki},
 journal = {Proceedings of the NIPR Symposium on Antarctic Geosciences},
 month = {Sep},
 note = {P(論文), Late Cenozoic basanites of the McMurdo Volcanic Group, Antarctica, contain numerous ultramafic xenoliths derived from the upper mantle. The xenoliths show multiple-episodes of metasomatism resulting in formation of the veined metasomites and the equilibrated metasomites. The metasomatized xenoliths are characterized texturally and chemically by co-existence of Ti-augite, phlogopitic mica, pargasitic and kaersutitic amphiboles, Al-spinel and apatite with the upper mantle olivine, pyroxenes, and Cr-spinel. Ti-, Al-, Fe- and Ca- enrichments and Si-, Cr- and Mg-depletions observed in the metasomatic clinopyroxenes indicate that the metasomatism was probably generated by an alkaline silicate melt reacting with solid phases of the upper mantle. Ti- and Fe-enrichments and Al-depletion in the metasomatic clinopyroxenes can be also detected as a separate episode of metasomatism different from the above veined-type reactions. Texturally and chemically equilibrated phlogopites and pargasites in the mantle-derived xenoliths provide a different type metasomatism, showing conspicuous depletions in TiO_2,Al_2O_3,Cr_2O_3,and K_2O, and enrichments in SiO_2 and Na_2O.},
 pages = {68--79},
 title = {METASOMATIC VEINS AND MINERALS IN MANTLE-DERIVED XENOLITHS, ANTARCTICA},
 volume = {2},
 year = {1988}
}