Biomarkers from individual carbonate phases of an Oligocene cold-seep deposit, Washington State, USA
- Author(s)
- A. Hagemann, T. Leefmann, J. Peckmann, V.-E. Hoffmann, V. Thiel
- Abstract
An Oligocene cold-seep limestone (Lincoln Creek Formation, Washington State, USA) was studied for its lipid biomarker inventory. Biomarker analysis on minute amounts of sample (tens of mg) and complementary C analyses allowed us to link biogeochemical processes with individual, closely intertwined carbonate phases. The ancient seep deposit exhibits four major carbonate phases, according to the paragenetic sequence of (I) micrite, (II) yellow aragonite, (III) clear aragonite and (IV) equant calcite spar. For the micrite, varying but significant amounts of archaea-derived isoprenoids clearly indicate that the precipitation of this phase was induced by the microbial anaerobic oxidation of methane (AOM). However, water column-derived lipids present in this carbonate phase reflect the incorporation of organic matter from background sediment cemented by authigenic micrite. Yellow aragonite made up only a minor rock component (
- Organisation(s)
- Department of Geology
- External organisation(s)
- Georg-August-Universität Göttingen
- Journal
- Lethaia: an international journal of palaeontology and stratigraphy
- Volume
- 46
- Pages
- 7-18
- No. of pages
- 12
- ISSN
- 0024-1164
- DOI
- https://doi.org/10.1111/j.1502-3931.2012.00316.x
- Publication date
- 01-2013
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 105121 Sedimentology
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/00c23163-abc0-4004-8fa4-505ff6fb373c