@article{oai:nipr.repo.nii.ac.jp:00002695, author = {ニイダ, キヨアキ and カミヌマ, カツタダ and シブヤ, カズオ and NIIDA, Kiyoaki and KAMINUMA, Katsutada and SHIBUYA, Kazuo}, journal = {Proceedings of the NIPR Symposium on Antarctic Geosciences}, month = {Sep}, note = {P(論文), 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.}, pages = {146--157}, title = {CUMULATE INCLUSIONS FROM TURTLE ROCK, ROSS ISLAND, ANTARCTICA}, volume = {5}, year = {1991} }