Geologic and seismic velocity structure of the crust/ mantle transition in the Bay of Islands Ophiolite Complex ( Canada).

J. A. Karson, J. A. Collins, J. F. Casey

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

Geological investigations of the Bay of Islands Ophiolite Complex show that while a typical layered ophiolite suite is present, the thickness of major lithologic units is extremely variable from place to place. The composition and internal structure of map-sale (km across) lithologic units as well as the contacts that bound them are laterally variable. Inferred velocity-depth functions of the crust/mantle ("Moho') transition reconstructed for this terrane as oceanic lithosphere suggest an extremely complex internal seismic structure. Although the types of geological features described are striking in ophiolites and are significant to the understanding of crustal accretion processes, many of them occur on such a small scale that they might go undetected in different types of seismic experiments in contemporary oceanic lithosphere.-from Authors

Original languageEnglish (US)
Pages (from-to)6126-6138
Number of pages13
JournalJournal of Geophysical Research
Volume89
Issue numberB7
DOIs
StatePublished - Jan 1 1984
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

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