TY - JOUR
T1 - Miocene sandstone of 'continental' origin on Iriomote Island, southwest Ryukyu Arc, Eastern Asia
AU - Saitoh, Yu
AU - Masuda, Fujio
PY - 2004/11
Y1 - 2004/11
N2 - We evaluated the major mineral composition of 100 sandstone samples from the Iriomote Formation of the Yaeyama Group located at the southwestern end of the Ryukyu Islands, eastern Asia. These sandstones are feldspathic arenites. Paleocurrents inferred from these sandstones are generally from north to south. Compared with other Tertiary sandstones of the Japanese Islands arc, the Iriomote sandstones are enriched in quartz and contain less lithic fragments. The roundness and sorting of the sand grains are high, suggesting long transport distances. We interpret these compositional and textural data as indicating that the provenance of the Iriomote Formation was the Eurasian Continent.
AB - We evaluated the major mineral composition of 100 sandstone samples from the Iriomote Formation of the Yaeyama Group located at the southwestern end of the Ryukyu Islands, eastern Asia. These sandstones are feldspathic arenites. Paleocurrents inferred from these sandstones are generally from north to south. Compared with other Tertiary sandstones of the Japanese Islands arc, the Iriomote sandstones are enriched in quartz and contain less lithic fragments. The roundness and sorting of the sand grains are high, suggesting long transport distances. We interpret these compositional and textural data as indicating that the provenance of the Iriomote Formation was the Eurasian Continent.
KW - Islands arc
KW - Sandstone composition
KW - Sedimentary rocks
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U2 - 10.1016/j.jseaes.2003.10.002
DO - 10.1016/j.jseaes.2003.10.002
M3 - Article
AN - SCOPUS:10244251676
VL - 24
SP - 137
EP - 144
JO - Journal of Asian Earth Sciences
JF - Journal of Asian Earth Sciences
SN - 1367-9120
IS - 2
ER -