TY - CHAP

T1 - Chemostratigraphy Across the Permian-Triassic Boundary

T2 - The Effect of Sampling Strategies on Carbonate Carbon Isotope Stratigraphic Markers

AU - Schobben, Martin

AU - Heuer, Franziska

AU - Tietje, Melanie

AU - Ghaderi, Abbas

AU - Korn, Dieter

AU - Korte, Christoph

AU - Wignall, Paul B.

N1 - Funding Information: The authors like to thank Harri Wyn Williams (University of Leeds) for his help in preparing the mounted and polished rock slabs, Hans-Rudolf Knöfler (Museum für Naturkunde, Berlin) for making thin sections, Kirsten Born (Museum für Naturkunde, Berlin) for performing the SEM analyses, and Bo Petersen (University of Copenhagen) for conducting the isotope measurements. The study benefited from support from the Deutsche Forschungsgemeinschaft (DFG) (projects KO1829/12-1, KO1829/12-2, KO2011/8-1, KO1829/18-1, and FOR 2332); MS is currently funded by a DFG Research Fellowship (SCHO 1689/1-1). Funding Information: The authors like to thank Harri Wyn Williams (University of Leeds) for his help in preparing the mounted and polished rock slabs, Hans‐Rudolf Knöfler (Museum für Naturkunde, Berlin) for making thin sections, Kirsten Born (Museum für Naturkunde, Berlin) for performing the SEM analyses, and Bo Petersen (University of Copenhagen) for conducting the isotope measurements. The study benefited from support from the Deutsche Forschungsgemeinschaft (DFG) (projects KO1829/12‐1, KO1829/12‐2, KO2011/8‐1, KO1829/18‐1, and FOR 2332); MS is currently funded by a DFG Research Fellowship (SCHO 1689/1‐1). Publisher Copyright: © 2019 the American Geophysical Union. Published 2019 by John Wiley & Sons, Inc.

PY - 2018

Y1 - 2018

N2 - A major extinction pulse occurred just below the conodont-defined Permian-Triassic boundary. Global-scale compilations of increasingly larger paleontological, sedimentological, and geochemical datasets further amplify our understanding of this event by unraveling temporospatial patterns. Robust stratigraphic frameworks are an integral part of these worldwide compilations. Bulk carbonate rock carbon isotope records are a widely used, and easy-to-generate, stratigraphic tool; it can substitute for biostratigraphy. However, inconsistencies in the amplitude and shape of stratigraphic carbon isotope patterns have also hampered the successful linkages of different geographic locations. In this study, we focus on the multicomponent nature of various limestone facies. We show how sampling strategies can be adapted in order to retrieve material from this multicomponent system that will most likely represent secular patterns in marine dissolved inorganic carbon δ13C. By obtaining multiple and randomly chosen bed-internal samples, we reveal that the magnitude of bed-internal δ13C variations can differ between distinct lithologies. However, we also note that the largest within-bed variations (in excess of 0.5‰) do not correspond to obvious textural variations for this specific rock. Bed-internal variations do not always trace marine dissolved inorganic carbon δ13C and might cause identification of ambiguous isotope stratigraphic markers that do not allude to globally correlative signals.

AB - A major extinction pulse occurred just below the conodont-defined Permian-Triassic boundary. Global-scale compilations of increasingly larger paleontological, sedimentological, and geochemical datasets further amplify our understanding of this event by unraveling temporospatial patterns. Robust stratigraphic frameworks are an integral part of these worldwide compilations. Bulk carbonate rock carbon isotope records are a widely used, and easy-to-generate, stratigraphic tool; it can substitute for biostratigraphy. However, inconsistencies in the amplitude and shape of stratigraphic carbon isotope patterns have also hampered the successful linkages of different geographic locations. In this study, we focus on the multicomponent nature of various limestone facies. We show how sampling strategies can be adapted in order to retrieve material from this multicomponent system that will most likely represent secular patterns in marine dissolved inorganic carbon δ13C. By obtaining multiple and randomly chosen bed-internal samples, we reveal that the magnitude of bed-internal δ13C variations can differ between distinct lithologies. However, we also note that the largest within-bed variations (in excess of 0.5‰) do not correspond to obvious textural variations for this specific rock. Bed-internal variations do not always trace marine dissolved inorganic carbon δ13C and might cause identification of ambiguous isotope stratigraphic markers that do not allude to globally correlative signals.

UR - http://www.scopus.com/inward/record.url?scp=85082382495&partnerID=8YFLogxK

U2 - 10.1002/9781119382508.ch9

DO - 10.1002/9781119382508.ch9

M3 - Book chapter

AN - SCOPUS:85082382495

T3 - Geophysical Monograph Series

SP - 159

EP - 181

BT - Geophysical Monograph Series

PB - John Wiley and Sons, Inc.

ER -