Earliest Eocene (53 Ma) convergence in the Southwest Pacific; evidence from pre-obduction dikes in the ophiolite of New Caledonia. - Archive ouverte HAL Access content directly
Journal Articles Terra Nova Year : 2006

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

(1) , (2) , (3) , (2)
1
2
3

Abstract

Uncertainty about 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 prior to 53 Ma. These new results infer that obduction in the Southwest Pacific is unrelated to the reorientation of the Pacific plate motion that occurred at ca. 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.
Fichier principal
Vignette du fichier
53MaSubductTER.pdf (1.71 Mo) Télécharger le fichier
Loading...

Dates and versions

hal-00094796 , version 1 (15-09-2006)

Identifiers

  • HAL Id : hal-00094796 , version 1

Cite

Dominique Cluzel, Sébastien Meffre, Pierre Maurizot, Anthony J. Crawford. Earliest Eocene (53 Ma) convergence in the Southwest Pacific; evidence from pre-obduction dikes in the ophiolite of New Caledonia.. Terra Nova, 2006, 18 (6), pp.395-402. ⟨hal-00094796⟩
115 View
447 Download

Share

Gmail Facebook Twitter LinkedIn More