40Ar/39Ar dating of oil generation and migration at complex continental margins

Darren F. Mark, John Parnell, Simon P. Kelley, Martin R. Lee, Sarah C. Sherlock

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Oil-bearing fluid inclusions trapped within authigenic K-feldspar in Late Jurassic reservoirs throughout the UK Atlantic margin are evidence for an early oil migration event from Late Jurassic source rocks in the Faeroe-Shetland Basin. Previous compound-specific isotope studies confirm the hydrocarbon provenance. Temperature-composition-time data show that the Late Jurassic source rocks were oil mature 113 +/- 3.5 Ma (2 sigma). This new (40)/Ar/Ar-39 atithigenic K-feldspar age shows that the Late Jurassic source rocks were oil mature 30-40 m.y. prior to current estimates.

Original languageEnglish
Pages (from-to)75-78
Number of pages4
JournalGeology
Volume38
Issue number1
DOIs
Publication statusPublished - Jan 2010

Keywords

  • UK Atlantic margin
  • authigenic K-feldspar
  • Faroe-Shetland basin
  • fluid-flow
  • thermal history
  • West
  • AR
  • inclusions
  • diffusion
  • events

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