@article{HuckWohlwendCoimbraetal.2017, author = {Huck, Stefan and Wohlwend, Stephan and Coimbra, Rute and Christ, Nicolas and Weissert, Helmut}, title = {Disentangling shallow-water bulk carbonate carbon isotope archives with evidence for multi-stage diagenesis}, series = {The depositional record}, volume = {3}, journal = {The depositional record}, publisher = {Wiley}, address = {Hoboken}, issn = {2055-4877}, doi = {10.1002/dep2.35}, pages = {233 -- 257}, year = {2017}, abstract = {Disentangling shallow-water bulk carbonate carbon isotope archives into primary and diagenetic components is a notoriously difficult task and even diagenetically screened records often provide chemostratigraphic patterns that significantly differ from global signals. This is mainly caused by the polygenetic nature of shallow-water carbonate substrates, local carbon cycle processes causing considerable neritic-pelagic isotope gradients and the presence of hiatal surfaces resulting in extremely low carbonate preservation rates. Provided here is an in-depth petrographic and geochemical evaluation of different carbonate phases of a mid-Cretaceous (Barremian-Aptian) shallow-water limestone succession (Jabal Madar section) deposited on the tropical Arabian carbonate platform in Oman. The superposition of stable isotope signatures of identified carbonate phases causes a complex and often noisy bulk carbon isotope pattern. Blocky sparite cements filling intergranular pores and bioclastic voids evidence intermediate to (arguably) deep burial diagenetic conditions during their formation, owing to different timing or differential faulting promoting the circulation of fluids from variable sources. In contrast, sparite cements filling sub-vertical veins reveal a rock-buffered diagenetic fluid composition with an intriguing moderate enrichment in 13C, probably due to fractionation during pressure release in the context of the Miocene exhumation of the carbonate platform under study. The presence of abundant, replacive dedolomite in mud-supported limestone samples forced negative carbon and oxygen isotope changes that are either associated with the thermal breakdown of organic matter in the deep burial realm or the expulsion of buried meteoric water in the intermediate burial realm. Notwithstanding the documented stratigraphically variable and often facies-related impact of different diagenetic fluids on the bulk-rock stable isotope signature, the identification of diagenetic end-members defined δ13C and δ18O threshold values that allowed the most reliable 'primary' bulk carbon isotope signatures to be extracted. Most importantly, this approach exemplifies how to place regional shallow-water stable isotope patterns with evidence for a complex multi-stage diagenetic history into a supraregional or even global context.}, language = {en} } @misc{WilsonHuhtamiesHucketal.2001, author = {Wilson, Peter and Huhtamies, Mikko and Huck, Stephan and Gahlen, Gundula and Herrmann, Michael and Reimer, Torsten F. and Winnige, Norbert and P{\"o}hlmann, Markus and Pauser, Josef and Fuchs, Antje and M{\"o}bius, Sascha and Heil, Wolfgang and Jacobs, Rainer and Kaiser, Michael and Kroll, Stefan and Blank, Ralf and Gr{\"u}ndel, Olaf and Schl{\"u}rmann, Jan and Geffarth, Renko and Bavendamm, Gundula}, title = {Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit}, volume = {5}, number = {2}, organization = {Arbeitskreis Milit{\"a}r und Gesellschaft in der Fr{\"u}hen Neuzeit e.V. (Hrsg.)}, issn = {1617-9722}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-28126}, year = {2001}, abstract = {Aus dem Inhalt dieser Ausgabe: BEITR{\"A}GE: Peter H. Wilson: British and american perspectives on early modern warfare Mikko Huhtamies: Kriegswesen und Gesellschaft in der fr{\"u}hen Neuzeit in der finnisch-schwedischen Geschichtsforschung INTERNET: Stephan Huck: Nutzungsm{\"o}glichkeiten des Internets Gundula Gahlen , Michael Herrmann, Torsten F. Reimer und Norbert Winnige: Milit{\"a}rgeschichte der Fr{\"u}hen Neuzeit im Internet Die Online-Angebote des AMG und sfn Markus P{\"o}hlmann: Die Internetpr{\"a}senz des Arbeitskreises Milit{\"a}rgeschichte e.V. Josef Pauser: Das Online-Angebot des Arbeitskreises .Policey/Polizei im vormodernen Europa. Torsten F. Reimer: Eine Studie in Kriegf{\"u}hrung. Eine Vorstellung des H-War Military History Network PROJEKTE: Antje Fuchs: Ein neuer Konfessionskrieg? Erfahrungen von Krieg und Okkupation im Kurf{\"u}rstentum Hannover und benachbarten geistlichen F{\"u}rstent{\"u}mern zur Zeit des Siebenj{\"a}hrigen Krieges 1756-1763 Sascha M{\"o}bius: Ergebnisse der Magisterarbeit .Psychologische Aspekte friederizianischer Taktik im Siebenj{\"a}hrigen Krieg. Wolfgang Heil: Die Gemeinen Soldaten. Das Sozialleben der milit{\"a}rischen Unterschicht im altpreußischen Heer und seine Stellung in der altst{\"a}ndischen Gesellschaft. Rainer Jacobs: Milit{\"a}rische Dienstpflichten in der Fr{\"u}hen Neuzeit Michael Kaiser und Stefan Kroll: Forschungsprojekt Milit{\"a}r und Religiosit{\"a}t in der Fr{\"u}hen Neuzeit Ralf Blank: Die Schlosskanonen von Hohenlimburg Artilleriegesch{\"u}tze mit einer wechselvollen Geschichte Gundula Gahlen und Olaf Gr{\"u}ndel: Kataster zur Schlacht bei Wittstock von 1636 Jan Schl{\"u}rmann: Die Schleswig-Holstein-Gottorfischen Auxiliairtruppen im Spanischen Erbfolgekrieg . Ergebnisse einer Untersuchung BERICHTE: Renko Geffarth: Die besetzte res publica. Zum Verh{\"a}ltnis von ziviler Obrigkeit und milit{\"a}rischer Herrschaft in besetzten Gebieten vom Sp{\"a}tmittelalter bis zum 18. Jahrhundert. Gundula Bavendamm: Operationsgeschichte und moderne Historiographie. Ein Widerspruch?}, subject = {Milit{\"a}r / Geschichte}, language = {de} } @article{HuckSteinImmenhauseretal.2014, author = {Huck, Stefan and Stein, Melody and Immenhauser, Adrian and Skelton, Peter W. and Christ, Nicolas and Foellmi, Karl B. and Heimhofer, Ulrich}, title = {Response of proto-North Atlantic carbonate-platform ecosystems to OAE1a-related stressors}, series = {Sedimentary geology : international journal of applied and regional sedimentology}, volume = {313}, journal = {Sedimentary geology : international journal of applied and regional sedimentology}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0037-0738}, doi = {10.1016/j.sedgeo.2014.08.003}, pages = {15 -- 31}, year = {2014}, abstract = {Integrated biostratigraphic-chemostratigraphic studies provide evidence that the proto-North Atlantic realm witnessed major changes in carbonate platform production in the run-up of the Early Aptian oceanic anoxic event (OAE) 1a. Whereas pervasive growth of Lithocodium microencrusters represents an early harbinger of OAE1a-related environmental perturbation, the subsequent replacement of oligotrophic rudist-coral-nerineid by mesotrophic orbitolinid-oyster communities was clearly associated with the event itself. In order to test the supra-regional relevance of this major community replacement, two shallow-water sections in the southern Lusitanian Basin (Portugal) are investigated by means of geochemistry (carbon and oxygen isotopes), cement petrography and detailed sedimentological analysis. The focus is on a regional, prominent discontinuity surface (S4) at the transition between oligotrophic and mesotrophic carbonate platform production, which might indicate that the major biotic change could have been associated with a phase of non-sedimentation and possibly erosion. The studied sections (Sao Julia, Crismina) provide evidence that the major Early Aptian biotic turnover was preceded by numerous subordinate but significant changes in platform ecology, which mirrored a series of progressive short-term environmental changes in the course of OAE1. Several transient mass occurrences of orbitolinids indicate repeated phases of ecological stress arguably due to enhanced nutrient input and deepening. Small-scale sea-level changes at parasequence level below the major discontinuity surface are revealed by alternations of rudist assemblages dominated by clinger or recumbent forms as well as intercalated hardground and subaerial exposure stages. Expanded phases of subaerial exposure, however, can be largely ruled out following the geochemical and cement-petrographic data presented here. Enhanced continent-derived siliciclastic input characterising the lower orbitolinid-oyster dominated limestones is in support of a shift to more humid conditions during the middle Early Aptian. This is in line with palaeoclimatic data, which propose a southward movement of the mid-latitude arid climate belt during this time. The documented rapid replacement of oligotrophic assemblages by various environmental-stress adapted carbonate platform communities might be seen as explanation for ongoing Early Aptian proto-North Atlantic carbonate production during a time of widespread platform demise and drowning in the northern Tethyan realm. (C) 2014 Elsevier B.V. All rights reserved.}, language = {en} }