Geochemistry and petrographic characters at DSDP Leg 58 Holes
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| Autori principali: | , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1980
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| _version_ | 1867170466841493504 |
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| author | Furuta, Toshio Arai, Fusao |
| author_facet | Furuta, Toshio Arai, Fusao |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Refractive index and chemical composition were determined for glass shards contained in more than 100 tephra layers in DSDP Leg 58 sediment cores collected in the Shikoku Basin, North Philippine Sea. The refractive index is consistent with chemical composition. Refractive index and total iron show a linear relationship. Tephra in Pleistocene and Pliocene sediments is mostly rhyolitic and dacitic (non-alkali), whereas tephra in the Miocene shows wide composition variations in the eastern part of the basin. Basaltic tephra is recognized in Miocene sediments at Sites 443 and 444, but not at Site 442, west of the other two sites. This indicates that the basaltic tephra came from eruption relatively close to those drill sites (perhaps the Kinan Seamounts and the Shichito-Iwo Jima volcanic arc), although the exact source has not been identified. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_821286 |
| institution | PANGAEA |
| language | en |
| publishDate | 1980 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Geochemistry and petrographic characters at DSDP Leg 58 Holes Furuta, Toshio Arai, Fusao 58-442A; 58-442B; 58-443; 58-444; 58-444A; 58-445; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg58; North Pacific/BASIN Refractive index and chemical composition were determined for glass shards contained in more than 100 tephra layers in DSDP Leg 58 sediment cores collected in the Shikoku Basin, North Philippine Sea. The refractive index is consistent with chemical composition. Refractive index and total iron show a linear relationship. Tephra in Pleistocene and Pliocene sediments is mostly rhyolitic and dacitic (non-alkali), whereas tephra in the Miocene shows wide composition variations in the eastern part of the basin. Basaltic tephra is recognized in Miocene sediments at Sites 443 and 444, but not at Site 442, west of the other two sites. This indicates that the basaltic tephra came from eruption relatively close to those drill sites (perhaps the Kinan Seamounts and the Shichito-Iwo Jima volcanic arc), although the exact source has not been identified. |
| title | Geochemistry and petrographic characters at DSDP Leg 58 Holes |
| topic | 58-442A; 58-442B; 58-443; 58-444; 58-444A; 58-445; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Leg58; North Pacific/BASIN |
| url | https://doi.org/10.1594/PANGAEA.821286 |