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Earliest Eocene (53 Ma) convergence in the Southwest Pacific: evidence from pre-obduction dikes in the ophiolite of New Caledonia

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Cluzel, D and Meffre, S and Maurizot, P and Crawford, AJ (2006) Earliest Eocene (53 Ma) convergence in the Southwest Pacific: evidence from pre-obduction dikes in the ophiolite of New Caledonia. Terra Nova, 18 (6). pp. 395-402. ISSN 1365-3121

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Abstract

Uncertainty about the timing and location of the initiation of convergence in the western and south-western Pacific greatly hinders accurate plate tectonic reconstructions of subduction systems in that area. The chemistry and age of dikes intruding mantle peridotite in the ophiolite of New Caledonia infer that subduction-related magmatism began before 53 Ma. These new results infer that obduction in the south-west Pacific is unrelated to the reorientation of the Pacific plate motion that occurred c. 43 Ma and confirm new interpretations showing that changes in mantle flow, hotspot and plate motion may have occurred as soon as late Paleocene or early Eocene.

Item Type: Article
Journal or Publication Title: Terra Nova
Page Range: pp. 395-402
ISSN: 1365-3121
Identification Number - DOI: 10.1111/j.1365-3121.2006.00704.x
Additional Information: http://www.blackwell-synergy.com/doi/abs/10.1111/j.1365-3121.2006.00704.x
Date Deposited: 01 Feb 2007
Last Modified: 18 Nov 2014 03:13
URI: http://eprints.utas.edu.au/id/eprint/671
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