Late Carboniferous hydrocarbon-seep carbonates from the glaciomarine Dwyka Group, southern Namibia.

Journal article
(Original article)


Publication Details

Author(s): Himmler T, Freiwald A, Stollhofen H, Peckmann J
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology
Publisher: Elsevier
Publication year: 2008
Journal issue: 257
Pages range: 185-195
ISSN: 0031-0182
Language: English


Abstract


Limestone deposits with columnar to lenticular geometry (max. 3.2 m in height and 1.5 m in diameter) occur within the uppermost part of the Ganigobis Shale Member, a marine mudstone unit capping the second deglaciation sequence of the glaciomarine Dwyka Group in southern Namibia. The limestones mainly consist of four authigenic carbonate phases (microspar, banded/botryoidal cement, yellow calcite, spheroidal calcite). Extremely negative δ13C values (as low as - 51‰ VPDB) indicate a hydrocarbon-derived origin of the carbonates with biogenic methane being the most likely carbon source. The limestones contain a low-diversity but high-abundance faunal assemblage of tubular fossils. These fossils closely resemble the tubes of modern and fossil seep-dwelling vestimentiferan tube worms in terms of size, shape, arrangement, and taphonomical patterns. © 2007 Elsevier B.V. All rights reserved.



FAU Authors / FAU Editors

Stollhofen, Harald Prof. Dr.
Lehrstuhl für Geologie (Exogene Dynamik)


External institutions
Universität Bremen


How to cite

APA:
Himmler, T., Freiwald, A., Stollhofen, H., & Peckmann, J. (2008). Late Carboniferous hydrocarbon-seep carbonates from the glaciomarine Dwyka Group, southern Namibia. Palaeogeography, Palaeoclimatology, Palaeoecology, 257, 185-195. https://dx.doi.org/10.1016/j.palaeo.2007.09.018

MLA:
Himmler, Tobias, et al. "Late Carboniferous hydrocarbon-seep carbonates from the glaciomarine Dwyka Group, southern Namibia." Palaeogeography, Palaeoclimatology, Palaeoecology 257 (2008): 185-195.

BibTeX: 

Last updated on 2018-09-08 at 14:08