The character and distribution of mineralized fractures in the Kodiak Formation, Alaska: implications for fluid flow in an underthrust sequence

D. Fisher, T. Byrne

Research output: Contribution to journalArticle

62 Scopus citations

Abstract

The Kodiak Formation, an accreted slate belt in southwest Alaska, experienced two major episodes of fracturing and mineralization in the Late Cretaceous-early Tertiary. The earlier of these episodes is related to underthrusting of sediments below a major decollement (D1), whereas a later episode is marked by development of fold and thrust structures and a regionally pervasive slaty cleavage within the accretionary wedge (D2). D1 and D2 veins suggest substantial fluid flow within an ancient subduction complex, with development of hydrofractures first in the footwall and then in the hanging wall of a basal decollement that stepped from shallow to deeper structural levels. -from Authors

Original languageEnglish (US)
Pages (from-to)9069-9080
Number of pages12
JournalJournal of Geophysical Research
Volume95
Issue numberB6
DOIs
StatePublished - Jan 1 1990

All Science Journal Classification (ASJC) codes

  • 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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