PANGAEA_973164 Accumulation rates of biogenic components of ODP Hole 121-758A Wu, Xinying; Hu, Yue; Nan, Jingbo; Yao, Weiqi Accumulation rates of biogenic components of ODP Hole 121-758A 2024-11-11 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.973164 Investigator Xinying Wu 12332224@mail.sustech.edu.cn Earth Science Sample code/label DEPTH, sediment/rock Age Accumulation rate, mass Barite Accumulation rate, barite Opal, biogenic silica Accumulation rate, biogenic silica Calcium carbonate Accumulation rate, calcium carbonate mass Barium Aluminium Barium excess Productivity of carbon geoscientificInformation 121-758A Biogenic bloom Drilling/drill rig Late Miocene Leg121 Marine barite productivity proxies Upwelling DSDP/ODP/IODP sample designation Age model, Gradstein et al. (2020) GTS2020 Calculated Sequential leaching method according to Eagle et al. (2003) and Paytan et al. (1993) Opal extraction according to Mortlock et al. (1989) and Lyle et al. (2019) Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES) Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Varian, Varian 820 ES According to Dymond et al. (1992) Joides Resolution 1988-06-15 1988-06-24 Complete 5.3842 5.3842 90.3612 90.3612 63.38 m (DEPTH, sediment/rock) 124.04 m (DEPTH, sediment/rock) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

Leobener Str.

Bremen Bremen 28359 Germany online 312 data points text/tab-separated-values

The multi-proxies (BAR, bio-SiO2 MAR, and CaCO3 MAR) of productivity in Ocean Drilling Program (ODP) Leg 121 Site 758 Hole A (5°23.05'N, 90°21.67'E) during the late Miocene. Based on the biostratigraphic zones, we convert sediment depths to absolute ages on the Geologic Time Scale 2020 timescale (Gradstein et al., 2020; doi:10.1016/C2020-1-02369-3). We extract barite from marine sediments using the modified sequential leaching method (Eagle et al., 2003; doi:10.1029/2002PA000793; Paytan et al., 1993, doi:10.1038/366445a0) and examine the size and morphology of barite crystals by a scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX). We use the modified method after Mortlock et al. (1989, doi:10.1016/0198-0149(89)90092-7) and Lyle et al. (2019, doi:10.5194/cp-15-1715-2019) to extract biogenic opal from marine sediments. For the carbonate extraction, we digest sediments with 1.5 ml hydrofluoric acid and 0.5 ml concentrated nitric acid in a 50-ml Teflon tube at 180°C for 12 hours. After digestion, we evaporate all the acids on a 150°C electric heating plate. The sample reacts with 1 ml concentrated nitric acid and 1 ml Milli-Q water at 150°C for 12 hours. The supernatants are diluted to 40 g and are further prepared for Inductively Coupled Plasma Optical Emission Spectrometry analysis. We calculate mass accumulation rate (MAR) as a function of linear sedimentation rate (cm/ka) and dry bulk density (g/cm³). Sedimentation rates are obtained from the known reference points from the chronostratigraphic framework. The ODP reports obtain dry bulk density data (Peirce & Weissel, 1989; doi:10.2973/odp.proc.ir.121.115.1989). The accumulation rates of biogenic components (i.e., BAR, CaCO3 MAR, and bio-SiO2 MAR) are calculated as the product of MAR and the weight percent of biogenic components (wt%) in sediments. In the meantime, we analyze Baexcess to estimate export productivity (Pnew) following the algorithm equation after Dymond et al., 1992; doi:10.1029/92PA00181. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.973164"!

http://www.mindat.org/min-4723.html Barite https://doi.org/10.1016/C2020-1-02369-3 Age model, Gradstein et al. (2020) GTS2020 https://doi.org/10.1029/92PA01080 According to Dymond et al. (1992) https://doi.org/10.2973/odp.proc.ir.121.1989 Leg121 https://hdl.handle.net/10013/epic.27914.d001 DSDP/ODP/IODP sample designation https://www-odp.tamu.edu:443/resolutn.html Joides Resolution PANGAEA_973162 DIF 9.4 2024-11-11 2025-11-08