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Origin of the southern Okinawa Trough volcanism from detailed seismic tomography - art. no. B08308 ArchiMer
Lin, Jing-yi; Sibuet, Jean-claude; Lee, Chao-shing; Hsu, Shu-kun; Klingelhoefer, Frauke.
Magmatism associated with subducting plate edges or slab tears has been suggested in the southern Okinawa Trough. The cross back-arc volcanic trail, which consists of a cluster of about 70 seamounts, is located above a Ryukyu slab tear lying along the 123.3°E meridian. In November 2003, more than 3300 earthquakes recorded in this area by 15 ocean bottom seismometers and surrounding land stations during a period of 12 days were used to determine the three-dimensional Vp and Vs velocity structures and Vp/Vs ratios. A mantle inflow characterized by low Vp and Vs and high Vp/Vs passing through the slab tear is imaged. The fluid and/or melt component is rising obliquely from the slab tear in the directions of the cross back-arc volcanic trail, the northern...
Tipo: Text Palavras-chave: Slab component volcanism; Vp/Vs tomography; Southern Okinawa Trough back arc basin.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3032.pdf
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