Accumulation rates of biogenic components of ODP Hole 154-926B
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| Formato: | Dataset Open Access |
| Lenguaje: | en |
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PANGAEA
2024
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| _version_ | 1867171338710417408 |
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| author | Wu, Xinying Hu, Yue Nan, Jingbo Yao, Weiqi |
| author_facet | Wu, Xinying Hu, Yue Nan, Jingbo Yao, Weiqi |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The multi-proxies (BAR, bio-SiO2 MAR, and CaCO3 MAR) of productivity in Ocean Drilling Program (ODP) Leg 154 Site 926 Hole B (3°43'N, 42°54'W) 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 (Curry et al., 1995; doi:10.2973/odp.proc.ir.154.109.1995). 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_973165 |
| institution | PANGAEA |
| language | en |
| publishDate | 2024 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Accumulation rates of biogenic components of ODP Hole 154-926B Wu, Xinying Hu, Yue Nan, Jingbo Yao, Weiqi 154-926B; According to Dymond et al. (1992); Accumulation rate, barite; Accumulation rate, biogenic silica; Accumulation rate, calcium carbonate mass; Accumulation rate, mass; Age; Age model, Gradstein et al. (2020) GTS2020; Aluminium; Barite; Barium; Barium excess; Biogenic bloom; Calcium carbonate; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Varian, Varian 820 ES; Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES); Joides Resolution; Late Miocene; Leg154; Marine barite; North Atlantic Ocean; Opal, biogenic silica; Opal extraction according to Mortlock et al. (1989) and Lyle et al. (2019); Productivity of carbon; productivity proxies; Sample code/label; Sequential leaching method according to Eagle et al. (2003) and Paytan et al. (1993); Upwelling The multi-proxies (BAR, bio-SiO2 MAR, and CaCO3 MAR) of productivity in Ocean Drilling Program (ODP) Leg 154 Site 926 Hole B (3°43'N, 42°54'W) 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 (Curry et al., 1995; doi:10.2973/odp.proc.ir.154.109.1995). 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. |
| title | Accumulation rates of biogenic components of ODP Hole 154-926B |
| topic | 154-926B; According to Dymond et al. (1992); Accumulation rate, barite; Accumulation rate, biogenic silica; Accumulation rate, calcium carbonate mass; Accumulation rate, mass; Age; Age model, Gradstein et al. (2020) GTS2020; Aluminium; Barite; Barium; Barium excess; Biogenic bloom; Calcium carbonate; Calculated; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Inductively Coupled Plasma Mass Spectrometer (ICP-MS), Varian, Varian 820 ES; Inductively Coupled Plasma - Optical Emission Spectrometry (ICP-OES); Joides Resolution; Late Miocene; Leg154; Marine barite; North Atlantic Ocean; Opal, biogenic silica; Opal extraction according to Mortlock et al. (1989) and Lyle et al. (2019); Productivity of carbon; productivity proxies; Sample code/label; Sequential leaching method according to Eagle et al. (2003) and Paytan et al. (1993); Upwelling |
| url | https://doi.org/10.1594/PANGAEA.973165 |