Alternative plate model for the early Miocene evolution of the southwest Japan margin

Research Article| February 01, 1990 Alternative plate model for the early Miocene evolution of the southwest Japan margin J. P. Hibbard; J. P. Hibbard 1Department of Marine, Earth, and Atmospheric Science, Box 8208, North Carolina State University, Raleigh, North Carolina 27695 Search for other works by this author on: GSW Google Scholar D. E. Karig D. E. Karig 2Department of Geological Sciences, Snee Hall, Cornell University, Ithaca, New York 14853 Search for other works by this author on: GSW Google Scholar Author and Article Information J. P. Hibbard 1Department of Marine, Earth, and Atmospheric Science, Box 8208, North Carolina State University, Raleigh, North Carolina 27695 D. E. Karig 2Department of Geological Sciences, Snee Hall, Cornell University, Ithaca, New York 14853 Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1990) 18 (2): 170–174. https://doi.org/10.1130/0091-7613(1990)018<0170:APMFTE>2.3.CO;2 Article history First Online: 02 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 J. P. Hibbard, D. E. Karig; Alternative plate model for the early Miocene evolution of the southwest Japan margin. Geology 1990;; 18 (2): 170–174. doi: https://doi.org/10.1130/0091-7613(1990)018<0170:APMFTE>2.3.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 SocietyGeology Search Advanced Search Abstract The Neogene-Holocene tectonics of southwest Japan have been controlled by the interaction of the Eurasian, Philippine Sea, and Pacific plates, which now meet at the central Japan trench-trench-trench (TTT) triple junction. Previous plate models have depicted the Shikoku back-arc basin as opening at the eastern margin of the Philippine Sea plate, parallel to and against the Japan margin. These models consider the TTT triple junction as predating the Shikoku Basin, but they predict neither the evolution of this junction nor the nature of the southwest Japan plate boundary during basin opening. Our recent work on the Oligocene-Miocene strata at Cape Muroto, Shikoku Island, has allowed us to locate the approximate position of the Shikoku Basin spreading ridge at 15 Ma. Combined with a compilation of the geology of the early Miocene southwest Japan margin, this determination leads us to propose that the Shikoku Basin was separated from the Japanese margin by an extension of the Pacific plate during basin opening. The basin subsequently collided with southwest Japan at ca. 15 Ma; this model implies that the central Japan triple junction was generated during this collision. 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.