Provenance of sandstones from the Lower Cretaceous Sasayama Group, Inner Zone of Southwest Japan

Show simple item record Asiedu, D.K. Suzuki, S. Shibata, T. 2019-02-21T12:03:34Z 2019-02-21T12:03:34Z 2000-03
dc.identifier.other Volume 131, Issues 1–2,Pages 9-24
dc.description.abstract Modal analysis and phase chemistry of sandstones of the Lower Cretaceous Sasayama Group, Southwest Japan, indicate that the detritus were derived from heterogeneous sources that include medium- to high-grade metamorphic, mafic-ultramafic, and acidic magmatic rocks. Garnet geochemistry suggests their derivation from epidote-amphibolite to granulite facies metamorphic rocks. Sphene and chlorite geochemistry suggests their derivation from mafic rocks. Chemical compositions of chromian spinel indicate input from Alpine-type peridotite. The chemistry of the chromian spinel further suggests that the Alpine-type peridotite source was most probably formed under an oceanic back-arc basin setting rather than mid-oceanic ridge setting. Chemical compositions of chromian magnetite indicate that the Alpine-type peridotite provenance was subjected to metamorphism of up to the lower amphibolite facies prior to erosion and transport. The metamorphic and granitic rocks of the Hida-Oki Terrane, ophiolitic rocks of the Sangun-Renge Terrane, and rhyolitic rocks from uncertain terrane (Akiyoshi?) are most probably the major source of detritus to the Sasayama basin. The basin is most likely a strike-slip basin that formed along the eastern margin of the Asian continent. (C) 2000 Elsevier Science B.V. All rights reserved. en_US
dc.language.iso en en_US
dc.publisher Sedimentary Geology en_US
dc.subject Heavy minerals en_US
dc.subject Japan en_US
dc.subject Mineral chemistry en_US
dc.subject Modal analysis en_US
dc.subject Provenance en_US
dc.title Provenance of sandstones from the Lower Cretaceous Sasayama Group, Inner Zone of Southwest Japan en_US
dc.type Article en_US

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