The Pliocene-age Stirone River hydrocarbon chemoherm complex (Northern Apennines, Italy)

S. Cau, F. Franchi, M. Roveri, M. Taviani

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The Stirone River section in the Italian Northern Apennines hosts a rare example of Pliocene age hydrocarbon-imprinted carbonates in the Mediterranean Basin associated with deep-water hemipelagic lithologies. These include meter-sized, dolomite-cemented chimneys, micritic brecciated limestones, lucina-mudstones and chemosymbiotic bivalve shells. Some such chimneys show δ13C values as low as -37.5‰ VPDB, suggesting subsurface precipitation of authigenic dolomite induced by anaerobic oxidation of methane triggered by consortia of sulphate reducing bacteria. These carbonates are interpreted as part of the plumbing system related to hydrocarbon expulsion onto the seafloor, resulting from hydrocarbon-enriched defluidization processes dated at an interval at 3.6-3.3 Ma and associated with the thrust-related "Salsomaggiore structure".

Original languageEnglish
Pages (from-to)582-595
Number of pages14
JournalMarine and Petroleum Geology
Volume66
DOIs
Publication statusPublished - Sep 1 2015

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Geophysics
  • Geology
  • Economic Geology
  • Stratigraphy

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