Geochemistry and petrographic characters at DSDP Leg 58 Holes


Autoria(s): Furuta, Toshio; Arai, Fusao
Cobertura

MEDIAN LATITUDE: 27.773034 * MEDIAN LONGITUDE: 135.864828 * SOUTH-BOUND LATITUDE: 25.522700 * WEST-BOUND LONGITUDE: 133.208200 * NORTH-BOUND LATITUDE: 29.327500 * EAST-BOUND LONGITUDE: 137.683800 * DATE/TIME START: 1977-12-12T00:00:00 * DATE/TIME END: 1978-01-11T00:00:00

Data(s)

27/10/1980

Resumo

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.

Formato

application/zip, 3 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.821286

doi:10.1594/PANGAEA.821286

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Furuta, Toshio; Arai, Fusao (1980): Petrographic and geochemical properties of tephras in Deep Sea Drilling Project Cores from the North Philippine Sea. In: deVries Klein, G; Kobayashi, K; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 58, 617-627, doi:10.2973/dsdp.proc.58.113.1980

Palavras-Chave #58-442A; 58-442B; 58-443; 58-444; 58-444A; 58-445; Al2O3; Aluminium oxide; Aug; Augite; Biotite; Bt; Calcium oxide; CaO; Color desc; Color description; Deep Sea Drilling Project; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Electron microprobe; Epoch; Event; FeO; Glomar Challenger; Hbl; Hornblende; Hyp; Hypersthene; Iron oxide, FeO; K2O; Leg58; Magnesium oxide; Manganese oxide; Maximum; Mean range, maximum; Mean range, minimum; MgO; Minimum; MnO; Mode; Na2O; North Pacific/BASIN; ODP sample designation; Ol; Olivine; Opaque; Opaque minerals; Pl; Plagioclase; Potassium oxide; Pyrox; Pyroxene; Quartz; Qz; Range, maximum; Range, minimum; Ref ind; Refractive index; Sample code/label; Silicon dioxide; SiO2; Size; Sodium oxide; TiO2; Titanium oxide; Total; Total iron; Type; Volcanic Ggass; Volcanic glass
Tipo

Dataset