Organic carbon, calcium carbonate contents, mass accumulation rate, burial efficiency, and paleoproductivity record from a sediment core SK-313 GC01 southeastern Arabian Sea


Variations in the paleoproductivity during the last 14.4 kyr have been studied using organic carbon (OC), calcium carbonate (CaCO3) contents and their mass accumulation rate and burial efficiency, in a 14C-dated sediment core (SK 313 GC-01; 4.82-m) from the southeastern Arabian Sea. The core was sub-sampled at 1-cm intervals for the top 1 m and 2-cm intervals for the rest of the core. All subsamples were oven-dried at 40°C and finely powdered in an agate mortar with a pestle. CaCO3 content was determined by Ethylene Diamine Tetra-Acetic acid (EDTA) titration using Patton & Reader as an indicator (Shapiro and Brannock, 1962, doi:10.3133/b1144A). The OC content was determined by chromic acid digestion and subsequent titration with ferrous ammonium sulfate as described in Gaudette et al. (1974, doi:10.1306/74D729D7-2B21-11D7-8648000102C1865D). We note that paleoproductivity was the highest during the Bølling–Allerød warm event; a step-wise decreased productivity during the Younger Dryas cold period, the lowest productivity during the early Holocene, and increased and stabilized productivity during the mid-late Holocene interval.

Accumulation rate (MAR) of OC and CaCO3 (g/m²/a) was calculated using the following formula: OC (CaCO3) = (OC (CaCO3)×DBD×LSR)/100.Paleoproductivity (g/cm²/a) was estimated using the following formula by Stein (1986, hdl:10013/epic.14450): Paleoproductivity (PP) = 5.31 [OC (DBD)]0.71× LSR0.07 × WD0.45.Burial efficiency (BE, %) of OC was estimated using the following formula by Bhushan et al. (2001, doi:10.1016/S0025-3227(01)00179-7): BE (%) = [(Burial Flux)/Productivity]×100.

Metadata Access
Creator Veeran, Yoganandan ORCID logo
Publisher PANGAEA
Publication Year 2023
Funding Reference Department of Science and Technology Crossref Funder ID 496/2014
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 1928 data points
Discipline Earth System Research
Spatial Coverage (75.375 LON, 10.502 LAT); North Indian Ocean/ Southeastern Arabian Sea