Peckmann, Jörn

[["dc.bibliographiccitation.firstpage","565"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Geomicrobiology Journal"],["dc.bibliographiccitation.lastpage","577"],["dc.bibliographiccitation.volume","23"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Peckmann, Jörn"],["dc.contributor.author","Klautzsch, Sandra"],["dc.contributor.author","Thiel, Volker"],["dc.contributor.author","Reitner, Joachim"],["dc.date.accessioned","2018-11-07T09:10:35Z"],["dc.date.available","2018-11-07T09:10:35Z"],["dc.date.issued","2006"],["dc.description.abstract","The Late Cretaceous ( Campanian) Tepee Buttes represent a series of conical, fossiliferous limestone deposits embedded in marine shales that deposited in the Western Interior Seaway. The previously suggested origin of the Tepee Buttes at methaneseeps was confirmed by this study. delta(13)C values as low as - 50 parts per thousand of early diagenetic carbonate phases of two Tepee Buttes near Pueblo ( Colorado) reveal that methane was the major carbon source. Molecular fossils released from a methane-seep limestone contain abundant (13)C-depleted archaeal lipids ( PMI, biphytane; delta(13)C: - 118 and - 102 parts per thousand), derived from anaerobic methanotrophs. A suite of (13)C-depleted bacterial biomarkers ( branched fatty acids; - 73 to - 51 parts per thousand) reflects the former presence of sulfate-reducing bacteria, corroborating that a syntrophic consortium of archaea and bacteria mediating anaerobic oxidation of methane already existed in Cretaceous times. Molecular fossils also suggest that methane was not exclusively oxidized in an anaerobic process. A series of unusual C(34)/C(35)-8,14-secohexahydrobenzohopanes with low delta(13)C values (- 110 and - 107 parts per thousand) points to the presence of aerobic methanotrophic bacteria at the ancient seep site."],["dc.identifier.doi","10.1080/01490450600897369"],["dc.identifier.isi","000241196000005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26524"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.relation.issn","0149-0451"],["dc.title","Anaerobic and aerobic oxidation of methane at Late Cretaceous seeps in the Western Interior Seaway, USA"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","23"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Palaeogeography Palaeoclimatology Palaeoecology"],["dc.bibliographiccitation.lastpage","36"],["dc.bibliographiccitation.volume","280"],["dc.contributor.author","De Boever, Eva"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Thiel, Volker"],["dc.contributor.author","Muchez, Philippe"],["dc.contributor.author","Peckmann, Joern"],["dc.contributor.author","Dimitrov, Lyubomir"],["dc.contributor.author","Swennen, Rudy"],["dc.date.accessioned","2018-11-07T11:25:21Z"],["dc.date.available","2018-11-07T11:25:21Z"],["dc.date.issued","2009"],["dc.description.abstract","Impressive, several meters high tubular concretions in shallow marine calcareous sands and sandstones represent part of the well-exposed, subsurface plumbing network of an Early Eocene methane seep system in the Balkanides foreland (Pobiti Kamani area, Varna, NE Bulgaria). An integrated approach, including petrography, inorganic geochemistry and lipid biomarker analyses was used to reconstruct the evolution of pore fluids and cementation conditions during tube formation and particularly, the role of methane-related carbonate diagenesis. Host sediment lithification from marine pore waters was perturbed soon after deposition by oxidation of predominantly microbial methane causing pervasive cementation by a (13)C-poor, homogeneous calcite cement (delta(13)C values as low as -44.5 parts per thousand V-PDB). The importance of microbially mediated anaerobic oxidation of methane (AOM) is confirmed by extremely (13)C-depleted archaeal biomarkers (delta(13)C values as low as -123 parts per thousand V-PDB). A suite of macrocyclic dialkyl glycerol diethers (MDGD-0 to -2) and sn-3-hydroxyarchaeol comprises a characteristic trait of the Eocene tubular concretions and might represent molecular fossils of so far unknown methane-oxidizing archaea (ANME). Subsurface calcite cementation surrounding the ascending methane plume, resulted from the changing pore water chemistry in response to AOM and could have, on a local scale, been encouraged by the concurrent alteration of detrital feldspar. Fluctuating delta(13)C (Up to -8 parts per thousand V-PDB) and delta(18)O (-0.5 to -9 parts per thousand V-PDB) signatures within a single tubular sandstone concretion are at least partly the consequence of isotopic resetting during late meteoric water circulation. (C) 2009 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.palaeo.2009.05.010"],["dc.identifier.isi","000269990600002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56600"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","0031-0182"],["dc.title","The formation of giant tubular concretions triggered by anaerobic oxidation of methane as revealed by archaeal molecular fossils (Lower Eocene, Varna, Bulgaria)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","259"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Lethaia"],["dc.bibliographiccitation.lastpage","273"],["dc.bibliographiccitation.volume","45"],["dc.contributor.author","Kuechler, Rony R."],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Kiel, Steffen"],["dc.contributor.author","Freiwald, Andre"],["dc.contributor.author","Goedert, James L."],["dc.contributor.author","Thiel, Volker"],["dc.contributor.author","Peckmann, Joern"],["dc.date.accessioned","2018-11-07T09:11:53Z"],["dc.date.available","2018-11-07T09:11:53Z"],["dc.date.issued","2012"],["dc.description.abstract","Exotic limestone masses with silicified fossils, enclosed within deep- water marine siliciclastic sediments of the Early to Middle Miocene Astoria Formation, are exposed along the north shore of the Columbia River in southwestern Washington, USA. Samples from four localities were studied to clarify the origin and diagenesis of these limestone deposits. The bioturbated and reworked limestones contain a faunal assemblage resembling that of modern and Cenozoic deep- water methane- seeps. Five phases make up the paragenetic sequence: (1) micrite and microspar; (2) fibrous, banded and botryoidal aragonite cement, partially replaced by silica or recrystallized to calcite; (3) yellow calcite; (4) quartz replacing carbonate phases and quartz cement; and (5) equant calcite spar and pseudospar. Layers of pyrite frequently separate different carbonate phases and generations, indicating periods of corrosion. Negative d 13 Ccarbonate values as low as) 37.6& V- PDB reveal an uptake of methane- derived carbon. In other cases, d 13 Ccarbonate values as high as 7.1& point to a residual, 13 C- enriched carbon pool affected by methanogenesis. Lipid biomarkers include 13 C- depleted, archaeal 2,6,10,15,19- pentamethylicosane (PMI; d 13 C:) 128&), crocetane and phytane, as well as various iso- and anteiso- carbon chains, most likely derived from sulphate- reducing bacteria. The biomarker inventory proves that the majority of the carbonates formed as a consequence of sulphate- dependent anaerobic oxidation of methane. Silicification of fossils and early diagenetic carbonate cements as well as the precipitation of quartz cement - also observed in other methane- seep limestones enclosed in sediments with abundant diatoms or radiolarians is a consequence of a preceding increase of alkalinity due to anaerobic oxidation of methane, inducing the dissolution of silica skeletons. Once anaerobic oxidation of methane has ceased, the pH drops again and silica phases can precipitate."],["dc.identifier.doi","10.1111/j.1502-3931.2011.00280.x"],["dc.identifier.isi","000301429500011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/26821"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","0024-1164"],["dc.title","Miocene methane-derived carbonates from southwestern Washington, USA and a model for silicification at seeps"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","34"],["dc.bibliographiccitation.journal","Palaeogeography Palaeoclimatology Palaeoecology"],["dc.bibliographiccitation.lastpage","51"],["dc.bibliographiccitation.volume","468"],["dc.contributor.author","Gischler, Eberhard"],["dc.contributor.author","Heindel, Katrin"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Brunner, Benjamin"],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Peckmann, Joern"],["dc.date.accessioned","2018-11-07T10:27:24Z"],["dc.date.available","2018-11-07T10:27:24Z"],["dc.date.issued","2017"],["dc.description.abstract","Microbial carbonates are important components of postglacial tropical coral reef frameworks. Curious calcium carbonate protrusions in a submarine karst cave in the Belize Barrier Reef platform were initially interpreted as being largely the product of physicochemical precipitation around a meshwork of serpulid tubes. New petrographical, mineralogical, geochronological, and inorganic and organic geochemical data suggest that sulfate-reducing bacteria played a substantial role in carbonate formation, just as in cryptic settings of other modern, tropical coralgal reefs. The bacterial involvement in carbonate authigenesis is indicated by the content and isotopic composition of carbonate-associated sulfate, the presence of non-isoprenoidal sn-1-mono-O-alkyl glycerol monoethers (MAGEs) and terminally-branched fatty acids, and the observation that the majority of molecular fossils assigned to sulfate-reducing bacteria are tightly associated with the carbonate mineral lattice. The carbonate protrusions that were formerly named pseudostalactites, are termed biostalactites here to underline the significance of biological activity during carbonate formation. The Belize biostalactites are composed of four carbonate phases including serpulid tubes, lithified sediment, and microbial carbonate, as well as unconsolidated sediment usually found in macroborings of bivalve molluscs. Lithified sediment and microbial carbonate are fine-grained with clotted, mottled, and peloidal textures. While serpulid tubes are aragonitic, lithified sediment and microbial carbonates are mixtures of high-magnesium calcite and aragonite. Magnesium-calcite content increases with increasing consolidation. Lithified sediment and microbial carbonate are interpreted as fine, biodetrital sediment that was subsequently cemented by authigenic micrite. Scalenohedral high-magnesium calcite and acicular aragonite cements played a subordinate role in cementation. Carbon and oxygen stable isotope ratios of lithified sediment and microbial carbonate exhibit similar ranges as modern reefal microbialites. Our study exemplifies that heterotrophic bacteria can be a crucial agent that contributes to the formation of carbonate build-ups by cementing skeletal frameworks in cryptic environments. (C) 2016 Elsevier B.V. All rights reserved."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG) [Gi222/1]"],["dc.identifier.doi","10.1016/j.palaeo.2016.11.042"],["dc.identifier.isi","000394919000003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43228"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-616X"],["dc.relation.issn","0031-0182"],["dc.title","Cryptic biostalactites in a submerged karst cave of the Belize Barrier Reef revisited: Pendant bioconstructions cemented by microbial micrite"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","444"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Geological Magazine"],["dc.bibliographiccitation.lastpage","459"],["dc.bibliographiccitation.volume","152"],["dc.contributor.author","Natalicchio, M."],["dc.contributor.author","Peckmann, Joern"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Kiel, Steffen"],["dc.date.accessioned","2018-11-07T09:57:33Z"],["dc.date.available","2018-11-07T09:57:33Z"],["dc.date.issued","2015"],["dc.description.abstract","Three isolated limestone deposits and their fauna are described from a middle Eocene Flysch succession in northwestern Istria, Croatia. The limestones are identified as ancient methane-seep deposits based on fabrics and characteristic mineral phases, delta C-13(carbonate) values as low as -42.2% and C-13-depleted lipid biomarkers indicative of methane-oxidizing archaea. The faint bedding of the largest seep deposit, the great dominance of authigenic micrite over early diagenetic fibrous cement, as well as biomarker patterns indicate that seepage was diffusive rather than advective. Apart from methanotrophic archaea, aerobic methanotrophic bacteria were present at the Eocene seeps as revealed by C-13-depleted lanostanes and hopanoids. The observed corrosion surfaces in the limestones probably reflect carbonate dissolution caused by aerobic methanotrophy. The macrofauna consists mainly of chemosymbiotic bivalves such as solemyids (Acharax), thyasirids (Thyasira) and lucinids (Amanocina). The middle Eocene marks the rise of the modern seep fauna, but so far the fossil record of seeps of this age is restricted to the North Pacific region. The taxa found at Buje originated during the Cretaceous Period, whereas taxa typical of the modern seep fauna such as bathymodiolin mussels and vesicomyid clams are absent. Although this is only a first palaeontological glimpse into the biogeography during the rise of the modern seep fauna, it agrees with biogeographic investigations based on the modern vent fauna indicating that the dominant taxa of the modern seep fauna first appeared in the Pacific Ocean."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [Ki802/6-1]"],["dc.identifier.doi","10.1017/S0016756814000466"],["dc.identifier.isi","000356054000004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/37182"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Cambridge Univ Press"],["dc.relation.issn","1469-5081"],["dc.relation.issn","0016-7568"],["dc.title","Seep deposits from northern Istria, Croatia: a first glimpse into the Eocene seep fauna of the Tethys region"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","17"],["dc.bibliographiccitation.journal","Palaeogeography Palaeoclimatology Palaeoecology"],["dc.bibliographiccitation.lastpage","34"],["dc.bibliographiccitation.volume","390"],["dc.contributor.author","Kiel, Steffen"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Campbell, Kathleen A."],["dc.contributor.author","Crampton, James S."],["dc.contributor.author","Schioler, Poul"],["dc.contributor.author","Peckmann, Joern"],["dc.date.accessioned","2018-11-07T09:17:30Z"],["dc.date.available","2018-11-07T09:17:30Z"],["dc.date.issued","2013"],["dc.description.abstract","Six Cretaceous methane-seep deposits are reported from the Raukumara Peninsula, eastern North Island, New Zealand. Dinoflagellate dating indicates a Late Albian to mid-Cenomanian age for three deposits from Port Awanui, and a mid-Campanian age for two deposits from Waipiro Bay and for one from Owhena Stream. The dominant petrographic fabric of the carbonates is detrital micrite, and the numerous fenestrae and vugs are filled with various cements including two types of non-detrital micrite, and botryoidal and banded fibrous calcites. These petrographic features, in combination with negative delta C-13 values of early diagenetic micrites (as low as -29.2 parts per thousand vs. V-PDB) and C-13-depleted molecular fossils such as the archaeal biomarkers pentamethylicosane (-97 parts per thousand vs. V-PDB) and biphytane (-99 parts per thousand), and the bacterial biomarker anteiso-C-15 fatty acid ( 47 parts per thousand), reveal that sulfate-dependent anaerobic oxidation of methane (AOM) induced the formation of these deposits. The carbonates preserve a typical mollusk dominated, Late Mesozoic, deep-water seep fauna including the large modiomorphid bivalve Caspiconcha, the lucinid bivalve Ezolucina, and limpets, hokkaidoconchids and a large abyssochrysoid among the gastropods, with close biogeographic relationships to North Pacific seep faunas of Cretaceous age. In contrast to the general marine mollusk fauna of New Zealand, which shows a high degree of endemism in both the Cenozoic and Recent, New Zealand's Cretaceous to present-day seep faunas consist largely of taxa known from coeval seeps around the world. Thus while deep-water seeps in New Zealand were repeatedly or continuously colonized by members of the global seep fauna, the general mollusk fauna of the New Zealand region developed a considerable degree of endemism during this time. (C) 2012 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.palaeo.2012.10.033"],["dc.identifier.isi","000328438600003"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/28186"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-616X"],["dc.relation.issn","0031-0182"],["dc.title","Cretaceous methane-seep deposits from New Zealand and their fauna"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e109260"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","PLoS ONE"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Kiel, Steffen"],["dc.contributor.author","Glodny, Johannes"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Bulot, Luc G."],["dc.contributor.author","Campbell, Kathleen A."],["dc.contributor.author","Gaillard, Christian"],["dc.contributor.author","Graziano, Roberto"],["dc.contributor.author","Kaim, Andrzej"],["dc.contributor.author","Lazar, Iuliana"],["dc.contributor.author","Sandy, Michael R."],["dc.contributor.author","Peckmann, Joern"],["dc.date.accessioned","2018-11-07T09:33:43Z"],["dc.date.available","2018-11-07T09:33:43Z"],["dc.date.issued","2014"],["dc.description.abstract","Modern and Cenozoic deep-sea hydrothermal-vent and methane-seep communities are dominated by large tubeworms, bivalves and gastropods. In contrast, many Early Cretaceous seep communities were dominated by the largest Mesozoic rhynchonellid brachiopod, the dimerelloid Peregrinella, the paleoecologic and evolutionary traits of which are still poorly understood. We investigated the nature of Peregrinella based on 11 occurrences world wide and a literature survey. All in situ occurrences of Peregrinella were confirmed as methane-seep deposits, supporting the view that Peregrinella lived exclusively at methane seeps. Strontium isotope stratigraphy indicates that Peregrinella originated in the late Berriasian and disappeared after the early Hauterivian, giving it a geologic range of ca. 9.0 (+1.45/-0.85) million years. This range is similar to that of rhynchonellid brachiopod genera in general, and in this respect Peregrinella differs from seep-inhabiting mollusks, which have, on average, longer geologic ranges than marine mollusks in general. Furthermore, we found that (1) Peregrinella grew to larger sizes at passive continental margins than at active margins; (2) it grew to larger sizes at sites with diffusive seepage than at sites with advective fluid flow; (3) despite its commonly huge numerical abundance, its presence had no discernible impact on the diversity of other taxa at seep sites, including infaunal chemosymbiotic bivalves; and (4) neither its appearance nor its extinction coincides with those of other seep-restricted taxa or with global extinction events during the late Mesozoic. A preference of Peregrinella for diffusive seepage is inferred from the larger average sizes of Peregrinella at sites with more microcrystalline carbonate (micrite) and less seep cements. Because other seep-inhabiting brachiopods occur at sites where such cements are very abundant, we speculate that the various vent- and seep-inhabiting dimerelloid brachiopods since Devonian time may have adapted to these environments in more than one way."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2014"],["dc.identifier.doi","10.1371/journal.pone.0109260"],["dc.identifier.isi","000345204000053"],["dc.identifier.pmid","25296341"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/10991"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32025"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Public Library Science"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 3.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/3.0/"],["dc.title","The Paleoecology, Habitats, and Stratigraphic Range of the Enigmatic Cretaceous Brachiopod Peregrinella"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","213"],["dc.bibliographiccitation.journal","Palaeogeography Palaeoclimatology Palaeoecology"],["dc.bibliographiccitation.lastpage","228"],["dc.bibliographiccitation.volume","418"],["dc.contributor.author","Little, Crispin T. S."],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Boyce, Adrian J."],["dc.contributor.author","Crame, J. Alistair"],["dc.contributor.author","Francis, Jane E."],["dc.contributor.author","Kiel, Steffen"],["dc.contributor.author","Peckmann, Joern"],["dc.contributor.author","Pirrie, Duncan"],["dc.contributor.author","Rollinson, Gavyn K."],["dc.contributor.author","Witts, James D."],["dc.date.accessioned","2018-11-07T10:02:07Z"],["dc.date.available","2018-11-07T10:02:07Z"],["dc.date.issued","2015"],["dc.description.abstract","Fossil hydrocarbon seeps are present in latest Cretaceous (Maastrichtian) volcaniclastic shallow shelf sediments exposed on Snow Hill and Seymour Islands, James Ross Basin, Antarctica. The seeps occur in the Snow Hill Island Formation on Snow Hill Island and are manifest as large-sized, cement-rich carbonate bodies, containing abundant thyasirid bivalves and rarer ammonites and solemyid bivalves. These bodies have typical seep cement phases, with delta C-13 values between - 20.4 and - 10.7 parts per thousand and contain molecular fossils indicative of terrigenous organic material and the micro-organisms involved in the anaerobic oxidation of methane, including methanotrophic archaea and sulphate-reducing bacteria. On Seymour Island the seeps occur as micrite-cemented burrow systems in the Lopez de Bertodano Formation and are associated with thyasirid, solemyid and lucinid bivalves, and background molluscan taxa. The cemented burrows also have typical seep cement phases, with delta C-13 values between - 58.0 and - 24.6 parts per thousand. There is evidence from other data that hydrocarbon seepage was a common feature in the James Ross Basin throughout the Maastrichtian and into the Eocene. The Snow Hill and Seymour Island examples comprise the third known area of Maastrichtian hydrocarbon seepage. But compared to most other ancient and modem seep communities; the James Ross Basin seep fauna is of very low diversity, being dominated by infaunal bivalves, all of which probably had thiotrophic chemosymbionts, but which were unlikely to have been seep obligates. Absent from the James Ross Basin seep fauna are 'typical' obligate seep taxa from the Cretaceous and the Cenozoic. Reasons for this may have been temporal, palaeolatitudinal, palaeobathymetric, or palaeoecological. (C) 2014 Elsevier B.V. All rights reserved."],["dc.identifier.doi","10.1016/j.palaeo.2014.11.020"],["dc.identifier.isi","000349804100016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38166"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Elsevier Science Bv"],["dc.relation.issn","1872-616X"],["dc.relation.issn","0031-0182"],["dc.title","Late Cretaceous (Maastrichtian) shallow water hydrocarbon seeps from Snow Hill and Seymour Islands, James Ross Basin, Antarctica"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","187"],["dc.bibliographiccitation.journal","Gondwana Research"],["dc.bibliographiccitation.lastpage","202"],["dc.bibliographiccitation.volume","61"],["dc.contributor.author","Heindel, Katrin"],["dc.contributor.author","Foster, William J."],["dc.contributor.author","Richoz, Sylvain"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Roden, Vanessa Julie"],["dc.contributor.author","Baud, Aymon"],["dc.contributor.author","Brandner, Rainer"],["dc.contributor.author","Krystyn, Leopold"],["dc.contributor.author","Mohtat, Tayebeh"],["dc.contributor.author","Koşun, Erdal"],["dc.contributor.author","Twitchett, Richard J."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Peckmann, Jörn"],["dc.date.accessioned","2019-07-22T14:10:46Z"],["dc.date.available","2019-07-22T14:10:46Z"],["dc.date.issued","2018"],["dc.description.abstract","After the latest Permian mass extinction event, microbial mats filled the ecological niche previously occupied by metazoan reefs, resulting in widespread microbialites. This study focuses on the lipid biomarker (molecular fossil) and invertebrate fossil records from Neotethyan platform margin sections to understand microbial-metazoan bioherm formation. Here, we find that early Griesbachian thrombolitic and stromatolitic microbialites from Çürük Dag (Turkey) and Kuh e Surmeh (Iran) contain abundant lipid biomarkers (molecular fossils), representing input from cyanobacteria, anoxygenic phototrophic bacteria, sulfate-reducing bacteria, and halophilic archaea. The biomarker inventory suggests that the microbialites were constructed by cyanobacteria-dominated microbial mats. Biomarkers of halophilic archaea are interpreted to reflect input from the water column, suggesting that the Neotethys experienced at least episodically hypersaline conditions. We also demonstrate that bacteria, possible keratose sponges (up to 50% of the carbonate is represented by the possible sponges), and microconchids lived synergistically to form microbial-metazoan bioherms in the immediate aftermath of the extinction along the western margin of the Neotethys. Abundant fossils of oxygen-dependent invertebrates (i.e. microconchids, bivalves, gastropods, brachiopods, and ostracods) and foraminifers were also found within these bioherms. The presence of invertebrates in conjunction with abundant molecular fossils of cyanobacteria indicates an oxygenated water column. Even though the presence of the biomarker isorenieratane in microbialites may considered as evidence for euxinic conditions in the water column, its absence in the background sediments rather points to a source organism belonging to the mat community. The new finding of bioherms built in part by metazoans suggests that reef ecosystems underwent a major turnover across the extinction event, and shortens the ‘metazoan reef gap’ to just the uppermost Changhsingian. During the Early Triassic, therefore, reefal ecosystems were able to recover in oxygenated settings since the earliest Griesbachian, albeit in an impoverished state."],["dc.identifier.doi","10.1016/j.gr.2018.05.007"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61821"],["dc.language.iso","en"],["dc.relation.issn","1342-937X"],["dc.title","The formation of microbial-metazoan bioherms and biostromes following the latest Permian mass extinction"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1289"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Organic Geochemistry"],["dc.bibliographiccitation.lastpage","1302"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Birgel, Daniel"],["dc.contributor.author","Thiel, Volker"],["dc.contributor.author","Hinrichs, Kai-Uwe"],["dc.contributor.author","Elvert, Marcus"],["dc.contributor.author","Campbell, Kathleen A."],["dc.contributor.author","Reitner, Joachim"],["dc.contributor.author","Farmer, Jack D."],["dc.contributor.author","Peckmann, Jörn"],["dc.date.accessioned","2018-11-07T10:40:10Z"],["dc.date.available","2018-11-07T10:40:10Z"],["dc.date.issued","2006"],["dc.description.abstract","In order to reconstruct biogeochemical pathways at Mesozoic methane-seeps, a set of Late Jurassic (Tithonian) to Early Cretaceous (Aptian/Albian), C-13-depleted seep-limestones from forearc strata in western California were subjected to detailed molecular-isotopic biomarker analyses. Two of the microbial carbonate deposits are turbidite-hosted/fault-related, whereas one is hosted in serpentinite in a diapir-related setting. The limestones contain 1 3 C-depleted archaeal lipid biomarkers such as crocetane (delta C-13 similar to -80 parts per thousand) and PMI (similar to -100 parts per thousand), indicative of an involvement of anaerobic oxidation of methane (AOM) in carbonate precipitation. Isotopically depleted crocetane in the Tithonian sample represents the oldest reported occurrence of this compound at methane-seeps. In the set of samples, a series of strongly C-13-depleted, regular C-21 to C-24 isoprenoids possibly results from diagenetic alteration of archaeal sesterterpanylglycerol diethers as suggested by the presence of the putative intermediate 3,7,11,15,19-pentamethylicosanoic acid. C-13-depleted 17 alpha(H),21 beta(H) and 17 beta(H),21 alpha(H)-hopanes (C-30-C-34) with 22S- and 22R- isomer couplets (> C-31) are present in all samples in distributions indicative of a moderate thermal maturity. Low delta C-13 values (-78 parts per thousand to -60 parts per thousand) suggest that these are derived from anaerobic bacteria involved in AOM. Notably, 22S-isomers are consistently enriched in C-13 relative to their 22R-counterparts. Our samples represent 70 myr of seepage activity and AOM along the Mesozoic margin of western California, filling the gap between the currently oldest methane-seep biomarker record from the Oxfordian (Late Jurassic) and the more widely recognised Cenozoic examples. (c) 2006 Elsevier Ltd. All rights reserved."],["dc.identifier.doi","10.1016/j.orggeochem.2006.02.004"],["dc.identifier.isi","000241959900005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/46235"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Pergamon-elsevier Science Ltd"],["dc.publisher.place","Oxford"],["dc.relation.conference","Topical Meeting on Application of Stable Isotopes in Biogeosciences"],["dc.relation.eventlocation","Vienna, AUSTRIA"],["dc.relation.issn","0146-6380"],["dc.title","Lipid biomarker patterns of methane-seep microbialites from the Mesozoic convergent margin of California"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]