A summary of Cenozoic tectonic history along the IPOD Japan Trench transect

Research Article| September 01, 1982 A summary of Cenozoic tectonic history along the IPOD Japan Trench transect ROLAND VON HUENE; ROLAND VON HUENE 1U.S. Geological Survey, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar MARCUS LANGSETH; MARCUS LANGSETH 2Lamont-Doherty Geological Observatory, Palisades, New York 10964 Search for other works by this author on: GSW Google Scholar NORIYUKI NASU; NORIYUKI NASU 3Ocean Research Institute, University of Tokyo, Tokyo, Japan Search for other works by this author on: GSW Google Scholar HAKUYU OKADA HAKUYU OKADA 4Geoscience Institute, Shizuoka University, Shizuoka, Japan Search for other works by this author on: GSW Google Scholar GSA Bulletin (1982) 93 (9): 829–846. https://doi.org/10.1130/0016-7606(1982)93<829:ASOCTH>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation ROLAND VON HUENE, MARCUS LANGSETH, NORIYUKI NASU, HAKUYU OKADA; A summary of Cenozoic tectonic history along the IPOD Japan Trench transect. GSA Bulletin 1982;; 93 (9): 829–846. doi: https://doi.org/10.1130/0016-7606(1982)93<829:ASOCTH>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Along the International Program of Ocean Drilling (IPOD) Japan Trench transect, a mid-Cenozoic period of tectonism without arc volcanism separated an earlier Cretaceous to Paleogene and a later Neogene period of plate convergence and subduction. The Cretaceous to early Paleogene period of convergence is evidenced by andesitic volcanism associated with a large syncline, probably a forearc basin. The seaward flank of the basin is a tectonically thickened sediment sequence inferred to be an accretionary complex. The arc, the syncline, and the thickened sediment sequence resemble an arc-trench system of the size and structure of the Great Valley forearc basin and Franciscan accretionary complex of California, and they were probably continuations of the Yezo geosyncline and associated sequences exposed to the north on Hokkaido. The arc-trench system is contemporaneous with the adjacent Shimanto arc-trench system southwest of Tokyo Bay. In the early Paleogene, volcanism ceased, and part of the thickened sediment sequence of the Cretaceous-Paleogene margin was emergent as a 160-km-wide landmass which is recognized in seismic records as a later Paleogene sediment source. At the end of the Paleogene, this landmass began to subside and volcanism began again, but it was located first briefly on the east, and then on the west of the Cretaceous arc along the present arc of northern Honshu. The land-mass erosion surface is clearly visible as an angular unconformity in multichannel seismic-reflection records; the sequence of Neogene sediment, explosive volcanism, and benthic foraminiferal assemblages recording subsidence from subareal conditions to the present bathyal depths have been studied in Deep Sea Drilling Project (DSDP) cores. Cretaceous subduction appears to have resulted in a very extensive accretionary complex, whereas the Neogene subduction period appears to have been marked by little net accretion in the forearc area but massive subsidence and some erosion of the front of the convergent margin. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.