Hryniewicz, K, Hagström, J, Hammer, Ø et al. (3 more authors) (2015) Late Jurassic–Early Cretaceous hydrocarbon seep boulders from Novaya Zemlya and their faunas. Palaeogeography, Palaeoclimatology, Palaeoecology, 436. pp. 231-244. ISSN 0031-0182
Abstract
The paper describes Late Jurassic–Early Cretaceous seep carbonate boulders from the Russian Arctic island of Novaya Zemlya, collected in 1875 by A.E. Nordenskiöld during his expedition to Siberia. The carbonates are significantly depleted in heavy carbon isotopes (δ13C values as low as ca. − 40‰) and show textures typical for carbonates formed under the influence of hydrocarbons, such as fibrous carbonate cements and corrosion cavities. The rocks contain index fossils of Late Oxfordian–Early Kimmeridgian, Late Tithonian (Jurassic) and latest Berriasian–Early Valanginian (Cretaceous) age. The fossil fauna is species rich and dominated by molluscs, with subordinate brachiopods, echinoderms, foraminifera, serpulids and ostracods. Most of the species, including two chemosymbiotic bivalve species, likely belong to the ‘background’ fauna. Only a species of a hokkaidoconchid gastropod, and a possible abyssochrysoid gastropod, can be interpreted as restricted to the seep environment. Other seep faunas with similar taxonomic structure are suggestive of rather shallow water settings, but in case of Novaya Zemlya seep faunas such structure might result also from high northern latitude.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015, Elsevier. This is an author produced version of a paper published in Palaeogeography, Palaeoclimatology, Palaeoecology. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | hydrocarbon seeps;; Jurassic; Cretaceous; Boreal; Molluscs; Novaya Zemlya |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Earth Surface Science Institute (ESSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 15 Jul 2015 12:14 |
Last Modified: | 27 Jul 2016 22:55 |
Published Version: | http://dx.doi.org/10.1016/j.palaeo.2015.06.036 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.palaeo.2015.06.036 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:88030 |