Magmatism as an essential driving force for formation of active metamorphic core complexes in eastern Papua New Guinea

E. J. Hill, S. L. Baldwin, G. S. Lister

Research output: Contribution to journalArticle

84 Scopus citations

Abstract

The D'Entrecasteaux Islands in eastern Papua New Guinea are composed of a number of active metamorphic core complexes which have been intruded by granodiorite plutons during their formation. The plutons do not appear to have been intruded by diapiric processes as previously suggested. Late, relatively undeformed plutons form flat-lying bodies which crosscut structural boundaries and are strongly discordant to core complex shear zones. Granodiorite magmatism and the development of the metamorphic core complexes have occurred in a linear zone which coincides with a zone of thick crust and rugged topography. It is proposed that plutonism facilitated deformation in ductile extensional shear zones which resulted in tectonic exhumation of deep crustal rocks and formation of the metamorphic core complexes. -from Authors

Original languageEnglish (US)
Pages (from-to)10,441-10,451
JournalJournal of Geophysical Research
Volume100
Issue numberB6
DOIs
StatePublished - Jan 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Fingerprint Dive into the research topics of 'Magmatism as an essential driving force for formation of active metamorphic core complexes in eastern Papua New Guinea'. Together they form a unique fingerprint.

  • Cite this