Benthic and planktic carbon and oxygen isotopes, planktic trace elements, XRF-derived elemental ratios from Site NGHP-01-01A


The evolution of the South Asian monsoon (SAM) is not well-constrained prior to the Pleistocene, primarily due to a lack of recovered marine sediment archives. This study presents geochemical data from Site NGHP-01-01A in the eastern Arabian Sea from the Oligocene to Early Miocene (~32–20 Ma) to reconstruct the oceanographic evolution of this region through this interval. Analyses consist of planktic and benthic foraminiferal oxygen and carbon isotopes, and planktic foraminiferal trace elements (Mg/Ca and Mn/Ca), as well as seawater d18O (d18Osw) and Mg/Ca-derived temperatures. Along with XRF-derived elemental analysis, these reveal the Oligocene–Miocene transition (~23.7–22.7 Ma) to be a key initiation/intensification of the proto-SAM system, with the development of an intense oxygen minimum zone and monsoonal atmospheric circulation.

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Creator Beasley, Charlotte ORCID logo; Kender, Sev ORCID logo; Giosan, Liviu ORCID logo; Anand, Pallavi ORCID logo; Leng, Melanie J ORCID logo; Nilsson-Kerr, Katrina ORCID logo; Ullmann, Clemens V ORCID logo; Hesselbo, Stephen P; Littler, Kate
Publisher PANGAEA
Publication Year 2021
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 2 datasets
Discipline Earth System Research
Spatial Coverage (70.903 LON, 15.306 LAT)