Do drifts deposited adjacent to carbonate platforms record the signal of global carbon isotopic values?

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doi: 10.1111/sed.12580
Author(s): Swart, Peter K.; Mackenzie, Greta J.; Eberli, Gregor P.; Lüdmann, Thomas; Betzler, Christian
Author Affiliation(s): Primary:
University of Miami, Rosenstiel School of Marine and Atmospheric Science, Department of Marine Geosciences, Miami, FL, United States
University of Hamburg, Institute for Geology, Germany
Volume Title: Carbonate contourites and drifts
Volume Author(s): Kane, I., editor; Pufahl, P.; Della Porta, Giovanna; Betzler, Christian; Eberli, Gregor P.; Frank, T. D.
Source: Carbonate contourites and drifts, edited by I. Kane, P. Pufahl, Giovanna Della Porta, Christian Betzler, Gregor P. Eberli and T. D. Frank. Sedimentology, 66(4), p.1410-1426. Publisher: Wiley-Blackwell, Oxford, United Kingdom. ISSN: 0037-0746 CODEN: SEDIAT
Note: In English. 45 refs.; illus., incl. sects., 1 table, sketch maps
Summary: This study investigates the δ13C values of middle Miocene-Modern drift deposits and periplatform sediments in the Maldives and compares these data with the global δ13C values derived from bulk oceanic sediments and foraminifera. This comparison reveals that while the δ13C values of the early Miocene periplatform sediments in the Maldives appear to track the global record of δ13C values, including increases associated with the Oligocene-Miocene boundary as well as the variations within the Monterey Event, the correlation with the Monterey Event may be coincidental. It is suggested that variations in δ13C values do not reflect changes in oceanic dissolved inorganic carbon, but instead pulses of sediment arising from platform progradation that contribute carbonates with elevated δ13C values derived from the adjacent shallow-water atolls. This conclusion is supported both by correlations between the seismic sequence architecture and the δ13C values which document progradation of 13C-rich platform sediments, and also by the continuation of the interval of 13C-rich sediments past the end of the Monterey Event at 13 Ma within the drift. Abstract Copyright (2019), International Association of Sedimentologists.
Year of Publication: 2019
Research Program: IODP Integrated Ocean Drilling Program
IODP2 International Ocean Discovery Program
ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 06 Petrology, Sedimentary; Atlantic Ocean; C-13/C-12; Carbon; Carbonate platforms; Carbonate sediments; Cenozoic; Clastic sediments; Coral Sea; Drift; Expedition 359; Geochemical indicators; Geochemistry; IODP Site U1466; IODP Site U1467; IODP Site U1468; IODP Site U1471; Indian Ocean; Indian Ocean Islands; International Ocean Discovery Program; Isotope ratios; Isotopes; Leg 115; Leg 133; Leg 166; Maldive Islands; Middle Miocene; Miocene; Monterey Event; Neogene; North Atlantic; ODP Site 1006; ODP Site 709; ODP Site 811; Ocean Drilling Program; Oligocene; Pacific Ocean; Paleogene; Quaternary; Queensland Plateau; Sediments; South Pacific; Southwest Pacific; Stable isotopes; Straits of Florida; Tertiary; West Pacific
Coordinates: S191332 S162522 E1500232 E1461721
S131002 N050454 E0734953 E0590100
N045101 N045103 E0731702 E0731701
N044559 N044559 E0730808 E0730806
N045559 N045559 E0730141 E0730141
N045559 N045559 E0730417 E0730417
N044559 N044559 E0730808 E0730806
Record ID: 2019050398
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from John Wiley & Sons, Chichester, United Kingdom