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'Rootless' serpentinite seamount on the southern Izu-Bonin forearc: implications for basal erosion at convergent plate margins

Citation

Miura, R and Nakamura, Y and Koda, K and Tokuyama, H and Coffin, MF, 'Rootless' serpentinite seamount on the southern Izu-Bonin forearc: implications for basal erosion at convergent plate margins, Geology (Boulder), 32, (6) pp. 541-544. ISSN 0091-7613 (2004) [Refereed Article]


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Copyright Statement

Copyright 2004 Geological Society of America

DOI: doi:10.1130/G20319.1

Abstract

We use multichannel seismic reflection (MCS) and gravity data from the southern Izu-Bonin convergent plate margin to test for tectonic erosion. The Hahajima Seamount is a serpentinite seamount on the Izu-Bonin forearc. This serpentinite body likely originated from the mantle wedge beneath the Izu-Bonin arc, but it subsequently detached. MCS data and gravity modeling demonstrate that the Ogasawara Plateau on the incoming Pacific plate has been partly subducted beneath the Hahajima Seamount. Our analysis indicates that the Hahajima Seamount is a "rootless" serpentinite seamount, and the "root" of the serpentinite body was eroded during subduction of the western edge of the Ogasawara Plateau. Structural features of the Hahajima Seamount, the Ogasawara Plateau, and the Philippine Sea plate suggest that tectonic erosion, particularly basal erosion, has been occurring throughout this area.

Item Details

Item Type:Refereed Article
Keywords:subduction serpentinite seamount seismic reflection data gravity modeling Izu-Bonin Trench basal erosion
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine Geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Coffin, MF (Professor Mike Coffin)
ID Code:73756
Year Published:2004
Web of Science® Times Cited:14
Deposited By:Research Division
Deposited On:2011-10-25
Last Modified:2011-11-10
Downloads:2 View Download Statistics

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