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Catastrophic initiation of subduction following forced convergence across fracture zones

Hall, Chad E. and Gurnis, Michael and Sdrolias, Maria and Lavier, Luc L. and Müller, R. Dietmar (2003) Catastrophic initiation of subduction following forced convergence across fracture zones. Earth and Planetary Science Letters, 212 (1-2). pp. 15-30. ISSN 0012-821X. http://resolver.caltech.edu/CaltechAUTHORS:20121120-142052670

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Abstract

Although the formation of subduction zones plays a central role in plate evolution, the processes and geological settings that lead to the initiation of subduction are poorly understood. Using a visco-elastoplastic model, we show that a fracture zone could be converted into a self-sustaining subduction zone after approximately 100 km of convergence. Modeled initiation is accompanied by rapid extension of the over-riding plate and explains the inferred catastrophic boninitic volcanism associated with Eocene initiation of the Izu-Bonin-Mariana (IBM) subduction zone. Using global plate reconstructions, we suggest that IBM nucleation was associated with a change in plate motion between 55 and 45 Ma. We estimate that the forces resisting IBM subduction initiation were substantially smaller than available driving forces.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/S0012-821X(03)00242-5DOIUNSPECIFIED
http://www.sciencedirect.com/science/article/pii/S0012821X03002425PublisherUNSPECIFIED
Additional Information:© 2003 Elsevier Science B.V. Received 20 December 2002; received in revised form 22 April 2003; accepted 29 April 2003. We thank Y. Podladchikov and A. Poliakov for sharing their PARAZOV program. Reviews by D. Blackman, R. Stern, and S. Zhong greatly clarified the manuscript. This work was supported by NSF Grants EAR-0003558 and EAR-0107137, and is Contribution No. 8944 of the Seismological Laboratory.
Funders:
Funding AgencyGrant Number
NSFEAR-0003558
NSFEAR-0107137
Subject Keywords:subduction; initiation; fracture zones; Bonin Arc; Izu Arc; Mariana Trough
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Caltech Seismological Laboratory8944
Record Number:CaltechAUTHORS:20121120-142052670
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20121120-142052670
Official Citation:Chad E. Hall, Michael Gurnis, Maria Sdrolias, Luc L. Lavier, R.Dietmar Müller, Catastrophic initiation of subduction following forced convergence across fracture zones, Earth and Planetary Science Letters, Volume 212, Issues 1–2, 15 July 2003, Pages 15-30, ISSN 0012-821X, 10.1016/S0012-821X(03)00242-5.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35579
Collection:CaltechAUTHORS
Deposited By: Jason Perez
Deposited On:21 Nov 2012 22:03
Last Modified:27 Dec 2012 03:02

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