Gas seepage on an intertidal site: Torry Bay, Firth of Forth, Scotland

Alan G. Judd, Rob Sim, Paul Kingston, James McNally

    Research output: Contribution to journalArticle

    31 Citations (Scopus)

    Abstract

    Gas seeps occurring on tidal flats on the northern shore of the inner Firth of Forth are described. The principal gas is methane, which is considered to come from the coal-bearing rocks of the Lower Limestone Series (Carboniferous); either naturally or from abandoned coal workings. Seep activity has been known at the site for several years, and it is suggested that the presence of white filamentous bacteria (Beggiatoa sp.) and a carbonate precipitate are indicative of long-term seepage. Comparative studies at the seep and at a control site revealed that the seeps have only a marginal effect on the intertidal fauna. Migration of gas through the thin (<2 m) surficial sediments appears to be controlled by the topography of a gravel layer, seeps preferentially occurring where the top of the gravel is closest to the surface. The total gas emission from 70 to 100 individual seepage vents is estimated at ˜ 1 tonne CH4 yr-1, the majority of which is emitted direct to the atmosphere. © 2002 Elsevier Science Ltd. All rights reserved.

    Original languageEnglish
    Pages (from-to)2317-2331
    Number of pages15
    JournalContinental Shelf Research
    Volume22
    Issue number16
    DOIs
    Publication statusPublished - Nov 2002

    Keywords

    • Firth of Forth
    • Gas seepage
    • Methane
    • Scotland
    • UK

    Fingerprint Dive into the research topics of 'Gas seepage on an intertidal site: Torry Bay, Firth of Forth, Scotland'. Together they form a unique fingerprint.

  • Cite this