Miocene sandstone of 'continental' origin on Iriomote Island, southwest Ryukyu Arc, Eastern Asia

Yu Saitoh, Fujio Masuda

研究成果: Article

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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.

元の言語English
ページ(範囲)137-144
ページ数8
ジャーナルJournal of Asian Earth Sciences
24
発行部数2
DOI
出版物ステータスPublished - 2004 11
外部発表Yes

ASJC Scopus subject areas

  • Geology
  • Earth-Surface Processes

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