Silicate and opal in the Ross Sea
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
1986
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| _version_ | 1867168586093559808 |
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| author | Ledford-Hoffman, P A DeMaster, David J Nittrouer, Charles A |
| author_facet | Ledford-Hoffman, P A DeMaster, David J Nittrouer, Charles A |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Thirty-five box cores were collected from the continental shelf in the Ross Sea during cruises in January and February, 1983. Pb-210 and Pu-239, 240 geochronologies coupled with biogenic-silica measurements were used to calculate accumulation rates of biogenic silica. Sediment in the southern Ross Sea accumulates at rates ranging from <=0.6 to 2.7 mm/y, with the highest values occurring in the southwestern Ross Sea. Biogenic-silica content in surface sediments ranges from 2% (by weight) in Sulzberger Bay and the eastern Ross Sea to 41% in the southwestern Ross Sea. Biogenic-silica accumulation in the southwestern Ross Sea averages 2.7 * 10**-2 g/cm**2/y and is comparable to accumulation rates in high-productivity, upwelling environments from low-latitude continental margins (e.g., Gulf of California, coast of Peru). The total rate of biogenic-silica accumulation in the southern Ross Sea is approximately 0.2 * 10**14 g/y, with most of the accumulation occurring in basins (500-1000 m water depth). If biogenic-silica accumulation in the southern Ross Sea continental shelf is typical of other basins on the Antarctic continental shelf, as much as 1.2 * 10**14 g/y of silica could be accumulating in these deposits. Biogenic-silica accumulation on the Antarctic continental shelf may account for as much as a fourth of the dissolved silica supplied to the world ocean by rivers and hydrothermal vents. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_58017 |
| institution | PANGAEA |
| language | en |
| publishDate | 1986 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Silicate and opal in the Ross Sea Ledford-Hoffman, P A DeMaster, David J Nittrouer, Charles A BC; Box corer; Depth, bathymetric; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; LATITUDE; Ledford; LONGITUDE; Opal, biogenic silica; Opal, extraction; DeMaster, 1981; Sample, optional label/labor no; Silicate; Silicon Cycling in the World Ocean; SINOPS Thirty-five box cores were collected from the continental shelf in the Ross Sea during cruises in January and February, 1983. Pb-210 and Pu-239, 240 geochronologies coupled with biogenic-silica measurements were used to calculate accumulation rates of biogenic silica. Sediment in the southern Ross Sea accumulates at rates ranging from <=0.6 to 2.7 mm/y, with the highest values occurring in the southwestern Ross Sea. Biogenic-silica content in surface sediments ranges from 2% (by weight) in Sulzberger Bay and the eastern Ross Sea to 41% in the southwestern Ross Sea. Biogenic-silica accumulation in the southwestern Ross Sea averages 2.7 * 10**-2 g/cm**2/y and is comparable to accumulation rates in high-productivity, upwelling environments from low-latitude continental margins (e.g., Gulf of California, coast of Peru). The total rate of biogenic-silica accumulation in the southern Ross Sea is approximately 0.2 * 10**14 g/y, with most of the accumulation occurring in basins (500-1000 m water depth). If biogenic-silica accumulation in the southern Ross Sea continental shelf is typical of other basins on the Antarctic continental shelf, as much as 1.2 * 10**14 g/y of silica could be accumulating in these deposits. Biogenic-silica accumulation on the Antarctic continental shelf may account for as much as a fourth of the dissolved silica supplied to the world ocean by rivers and hydrothermal vents. |
| title | Silicate and opal in the Ross Sea |
| topic | BC; Box corer; Depth, bathymetric; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; LATITUDE; Ledford; LONGITUDE; Opal, biogenic silica; Opal, extraction; DeMaster, 1981; Sample, optional label/labor no; Silicate; Silicon Cycling in the World Ocean; SINOPS |
| url | https://doi.org/10.1594/PANGAEA.58017 |