Thermochronologic constraints on the tectonic evolution of active metamorphic core complexes, D'Entrecasteaux Islands, Papua New Guinea

Suzanne L Baldwin, G. S. Lister, E. J. Hill, D. A. Foster, I. McDougall

Research output: Contribution to journalArticle

138 Scopus citations

Abstract

A thermochronologic study of the D'Entrecasteaux Islands utilizing K/Ar, 40Ar/39Ar, and fission track techniques had documented the unroofing history of active metamorphic core complexes. Thermochronologic results indicate that emplacement of granodiorites closely coincided with retrogression of the metamorphic basement and movement on the outer shear zones bounding the gneiss domes. The granodiorite bodies associated with the D'Entrecasteaux Islands domes represent syn-kinematically emplaced granitoids intruded into an area of active continental extension. -from Authors

Original languageEnglish (US)
Pages (from-to)611-628
Number of pages18
JournalTectonics
Volume12
Issue number3
StatePublished - 1993
Externally publishedYes

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ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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