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| Main Authors: | , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2002
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| Online Access: | https://doi.org/10.1594/PANGAEA.710909 |
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| _version_ | 1867172221160521728 |
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| author | Higgins, Sean M Anderson, Robert F Marcantonio, Franco Schlosser, Peter Stute, Martin |
| author_facet | Higgins, Sean M Anderson, Robert F Marcantonio, Franco Schlosser, Peter Stute, Martin |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The accumulation of extraterrestrial 3He, a tracer for interplanetary dust particles (IDPs), in sediments from the Ontong Java Plateau (OJP; western equatorial Pacific Ocean) has been shown previously to exhibit a regular cyclicity during the late Pleistocene, with a period of ~100 ka. Those results have been interpreted to reflect periodic variability in the global accretion of IDPs that, in turn, has been linked to changes in the inclination of Earth's orbit with respect to the invariable plane of the solar system. Here we show that the accumulation in OJP sediments of authigenic 230Th, produced by radioactive decay of 234U in seawater, exhibits a 100-ka cyclicity similar in phase and amplitude to that evident in the 3He record. We interpret the similar patterns of 230Th and 3He accumulation to reflect a common origin within the ocean-climate system. Comparing spatial and temporal patterns of sediment accumulation against regional patterns of biological productivity and against the well-established pattern of CaCO3 dissolution in the deep Pacific Ocean leads to the further conclusion that a common 100-ka cycle in accumulation of biogenic, authigenic and extraterrestrial constituents in OJP sediments reflects the influence of climate-related changes in sediment focusing, rather than changes in the rate of production or supply of sedimentary constituents. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_710909 |
| institution | PANGAEA |
| language | en |
| publishDate | 2002 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Radioisotopes and He accumulation in deep sea sediments of the Ontong Java Plateau Higgins, Sean M Anderson, Robert F Marcantonio, Franco Schlosser, Peter Stute, Martin 130-806B; 130-806C; DRILL; Drilling/drill rig; Joides Resolution; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP; PC; Piston corer; RC17; RC17-177; Robert Conrad The accumulation of extraterrestrial 3He, a tracer for interplanetary dust particles (IDPs), in sediments from the Ontong Java Plateau (OJP; western equatorial Pacific Ocean) has been shown previously to exhibit a regular cyclicity during the late Pleistocene, with a period of ~100 ka. Those results have been interpreted to reflect periodic variability in the global accretion of IDPs that, in turn, has been linked to changes in the inclination of Earth's orbit with respect to the invariable plane of the solar system. Here we show that the accumulation in OJP sediments of authigenic 230Th, produced by radioactive decay of 234U in seawater, exhibits a 100-ka cyclicity similar in phase and amplitude to that evident in the 3He record. We interpret the similar patterns of 230Th and 3He accumulation to reflect a common origin within the ocean-climate system. Comparing spatial and temporal patterns of sediment accumulation against regional patterns of biological productivity and against the well-established pattern of CaCO3 dissolution in the deep Pacific Ocean leads to the further conclusion that a common 100-ka cycle in accumulation of biogenic, authigenic and extraterrestrial constituents in OJP sediments reflects the influence of climate-related changes in sediment focusing, rather than changes in the rate of production or supply of sedimentary constituents. |
| title | Radioisotopes and He accumulation in deep sea sediments of the Ontong Java Plateau |
| topic | 130-806B; 130-806C; DRILL; Drilling/drill rig; Joides Resolution; Leg130; North Pacific Ocean; Ocean Drilling Program; ODP; PC; Piston corer; RC17; RC17-177; Robert Conrad |
| url | https://doi.org/10.1594/PANGAEA.710909 |