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Sökning: WFRF:(Peckmann Jörn) > Mineral authigenesi...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00005470naa a2200517 4500
001oai:DiVA.org:nrm-4376
003SwePub
008211201s2021 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-43762 URI
0247 a https://doi.org/10.1002/dep2.1232 DOI
040 a (SwePub)nrm
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Zwicker, Jenniferu Department für Geodynamik und Sedimentologie Universität Wien Wien Austria4 aut
2451 0a Mineral authigenesis within chemosynthetic microbial mats: Coated grain formation and phosphogenesis at a Cretaceous hydrocarbon seep, New Zealand
264 c 2020-08-28
264 1b John Wiley & Sons,c 2021
338 a print2 rdacarrier
520 a  Marine hydrocarbon seeps are sites of chemosynthetic microbial activity and authigenic carbonate formation. Seep limestones are typified by a range of geochemical signatures of microbial hydrocarbon oxidation, but only few seep deposits reveal mesofabrics that can be regarded as evidence of microbial activity. A Cretaceous methane-seep limestone from Waipiro Bay, New Zealand, exhibits a fabric composed of cryptocrystalline carbonate fluorapatite between carbonate coated grains and spheroidal calcite. To understand the unusual Waipiro deposit, a paragenetic sequence has been derived for coated grains, spheroidal calcite and carbonate fluorapatite using thin section petrography, scanning electron microscopy, Fourier-transform infrared spectroscopy and stable isotope geochemistry. The formation of 13C-depleted coated grains (δ13C values as low as -15.8‰ Vienna-Pee Dee Belemnite) and spheroidal calcite (δ13C values as low as -21.3‰) was favoured by hydrocarbon oxidation. Fibrous banded and botryoidal cement, a typical early diagenetic phase of hydrocarbon-seep deposits, features δ13C values as low as -22.9‰. Coated grains and spheroidal calcite grew by displacive growth in a gel-like medium, probably a microbial mat. Phosphorus is a mobile element and marine pore waters are typically undersaturated with respect to carbonate fluorapatite. Specific conditions are consequently required to retain sufficient concentrations to precipitate carbonate fluorapatite. Possible sources of phosphorus for the formation of the 13C-depleted Waipiro carbonate fluorapatite (mean δ13C value of -15.4‰) include (a) the oxidation of sedimentary organic matter by organoclastic sulphate reduction, (b) the degradation of the microbial mat itself and (c) the active release of polyphosphate by sulphide-oxidizing bacteria. This study suggests that the formation of the Cretaceous Waipiro seep limestone involved an interplay of biogeochemical processes including sulphate-driven anaerobic oxidation of methane, organoclastic sulphate reduction and possibly nitrate-dependent sulphide oxidation. It further demonstrates that  coated grains resembling oncoids are not restricted to shallow water, photosynthesis dependent ecosystems. 
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Geologi0 (SwePub)105042 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Geology0 (SwePub)105042 hsv//eng
650 7a NATURVETENSKAPx Geovetenskap och miljövetenskapx Annan geovetenskap och miljövetenskap0 (SwePub)105992 hsv//swe
650 7a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Other Earth and Related Environmental Sciences0 (SwePub)105992 hsv//eng
653 a Paleontology
653 a Stratigraphy
653 a Geology
653 a Environmental Science (miscellaneous)
653 a Oceanography
653 a The changing Earth
653 a Den föränderliga jorden
653 a Diversity of life
653 a Livets mångfald
7001 a Smrzka, Danielu Department für Geodynamik und Sedimentologie Universität Wien Wien Austria4 aut
7001 a Steindl, Florianu Institut für Angewandte Geowissenschaften Technische Universität Graz Graz Austria4 aut
7001 a Böttcher, Michael E.u Geochemie & Isotopen‐BiogeochemieLeibniz‐Institut für Ostseeforschung (IOW) Warnemünde Germany;Marine Geochemie Universität Greifswald Greifswald Germany;Interdisziplinäre Fakultät Department für Maritime Systeme Universität Rostock Rostock Germany4 aut
7001 a Libowitzky, Eugenu Institut für Mineralogie und Kristallographie Universität Wien Wien Austria4 aut
7001 a Kiel, S.u Naturhistoriska riksmuseet,Enheten för paleobiologi,Department of Palaeobiology Swedish Museum of Natural History Stockholm Sweden;Bolin Centre for Climate Research Stockholm University Stockholm Sweden4 aut0 (Swepub:nrm)stefkiel
7001 a Peckmann, Jörnu Institut für Geologie Centrum für Erdsystemforschung und Nachhaltigkeit Universität Hamburg Hamburg Germany4 aut
7102 a Department für Geodynamik und Sedimentologie Universität Wien Wien Austriab Institut für Angewandte Geowissenschaften Technische Universität Graz Graz Austria4 org
7730 t The Depositional Recordd : John Wiley & Sonsg 7:2, s. 294-310q 7:2<294-310x 2055-4877
8564 u https://doi.org/10.1002/dep2.123
8564 u https://onlinelibrary.wiley.com/doi/pdfdirect/10.1002/dep2.123
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-4376
8564 8u https://doi.org/10.1002/dep2.123

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