Age and petrographic characterization of volcanic ash from ODP Leg 198 and Leg 126 sites


Autoria(s): Gadley, Kyle L; Marsaglia, Kathleen M
Cobertura

MEDIAN LATITUDE: 34.020356 * MEDIAN LONGITUDE: 151.876393 * SOUTH-BOUND LATITUDE: 30.916100 * WEST-BOUND LONGITUDE: 139.844300 * NORTH-BOUND LATITUDE: 37.790480 * EAST-BOUND LONGITUDE: 162.750880 * DATE/TIME START: 1989-04-30T06:30:00 * DATE/TIME END: 2001-10-04T03:00:00

Data(s)

26/03/2005

Resumo

In this study of volcanic ash retrieved from Shatsky Rise during Ocean Drilling Program Leg 198, the texture and composition of the volcanic components (glass and crystals) were used to fingerprint ash layers for detailed correlation. Correlations among ash layers in holes drilled at the same site as well as between sites, including sites on different parts (highs) of the rise, were tested. Although high-to-high correlations failed, intrahigh correlations were more successful. Our data suggest a significantly different source for some pyroclastic debris, especially at Site 1208, possibly associated with pumice rafts carried northward from the Izu-Bonin arc by the Kuroshio Current. Other ashes are consistent with rhyolitic to dacitic air fall ash from Asian arc volcanoes. We were not able to texturally distinguish between air fall ash and pumice-raft fallout but suspect that the latter is associated with higher percentages of vesiculated ash components, as we demonstrate occur in more proximal Izu-Bonin pyroclastic deposits.

Formato

application/zip, 2 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.778236

doi:10.1594/PANGAEA.778236

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Gadley, Kyle L; Marsaglia, Kathleen M (2005): Petrography and correlation of Cenozoic ash layers recovered on Shatsky Rise, ODP Leg 198. In: Bralower, TJ; Premoli Silva, I; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 198, 1-26, doi:10.2973/odp.proc.sr.198.108.2005

Palavras-Chave #126-788C; 126-790B; 126-791A; 198-1207A; 198-1208A; 198-1209A; 198-1209B; 198-1210A; 198-1210B; 198-1211A; 198-1211B; 198-1212A; 198-1212B; 198-1213A; Age model; Age model, biostratigraphy; Age model, GPTS (geomagnetic polarity timescale), Cande and Kent (1995); Age model, optional; Age model opt; Amp; Amphibole; Biotite; Bt; Ca; lithic, Lvl; Ca; lithic, Lvmi; Ca-colorless; lithic, blocky nonvesicular glass (Lvv); Ca-colorless; lithic, complex bubble wall glass (Lvvb); Ca-colorless; lithic, highly vesiculated glass (Lvvhv); Ca-colorless; lithic, moderately vesiculated glass (Lvvmv); Ca-colorless; lithic, platy/flat shard (Lvvp); Ca-colorless; lithic, slightly vesiculated glass (Lvvsv); Ca-colorless; lithic, u-shaped bubble wall glass (Lvvu); Ca-colorless; lithic, woody pumice (Lvvw); Ca-colorless; lithic, Y-shaped bubble wall glass (Lvvy); Ca-K; lithic, blocky nonvesicular glass (Lvv); Ca-K; lithic, complex bubble wall glass (Lvvb); Ca-K; lithic, highly vesiculated glass (Lvvhv); Ca-K; lithic, Lvmi; Ca-K; lithic, moderately vesiculated glass (Lvvmv); Ca-K; lithic, platy/flat shard (Lvvp); Ca-K; lithic, slightly vesiculated glass (Lvvsv); Ca-K; lithic, u-shaped bubble wall glass (Lvvu); Ca-K; lithic, woody pumice (Lvvw); Ca-K; lithic, Y-shaped bubble wall glass (Lvvy); Calculated; Ca-stained; Ca-stained, blocky; Ca-stained, platy; Ca-stained, shards; Ca-stained, vesiculated; Ca-stained; Lvvhv/Lvvw; Ca-stained; Lvvsv/Lvvmv; Ca-stained; Lvvu; Ca-stained; Lvvy; colored; Counts; dense; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event; extrapolated ages from biostratigaphic data (Bralower et al. 2002, doi:10.2973/odp.proc.ir.198.2002); extrapolated from shipboard paleomagnetic data (Bralower et al. 2002, doi:10.2973/odp.proc.ir.198.2002); Joides Resolution; K; lithic, Lvl; K; lithic, Lvmi; K/Ca-stained; K/Ca-stained, blocky; K/Ca-stained, platy; K/Ca-stained, shards; K/Ca-stained, vesiculated; K/Ca-stained; Lvvhv/Lvvw; K/Ca-stained; Lvvsv/Lvvmv; K/Ca-stained; Lvvu; K/Ca-stained; Lvvy; Kalifeldspar; K-colorless; lithic, blocky nonvesicular glass (Lvv); K-colorless; lithic, complex bubble wall glass (Lvvb); K-colorless; lithic, highly vesiculated glass (Lvvhv); K-colorless; lithic, moderately vesiculated glass (Lvvmv); K-colorless; lithic, platy/flat shard (Lvvp); K-colorless; lithic, slightly vesiculated glass (Lvvsv); K-colorless; lithic, u-shaped bubble wall glass (Lvvu); K-colorless; lithic, woody pumice (Lvvw); K-colorless; lithic, Y-shaped bubble wall glass (Lvvy); Kfs; K-stained; K-stained, blocky; K-stained, platy; Kstained, shards; K-stained, shards; K-stained, vesiculated; Kstained; Lvvhv/Lvvw; Kstained; Lvvsv/Lvvmv; K-stained; Lvvu; K-stained; Lvvy; Label; Leg126; Leg198; lithic, blocky nonvesicular glass (Lvv); lithic, complex bubble wall glass (Lvvb); lithic, highly vesiculated glass (Lvvhv); lithic, Lvl; lithic, Lvmi; lithic, moderately vesiculated glass (Lvvmv); lithic, platy/flat shard (Lvvp); lithic, slightly vesiculated glass (Lvvsv); lithic, u-shaped bubble wall glass (Lvvu); lithic, woody pumice (Lvvw); lithic, Y-shaped bubble wall glass (Lvvy); mbsf; Minerals; MonoQz; North Pacific Ocean; Ocean Drilling Program; ODP; ODP sample designation; Period; Petrographic microscope; Philippine Sea; Pl; Plagioclase; Pyrox; Pyroxene; Quartz, monocrystalline; Samp com; Sample code/label; Sample comment; stained, blocky; stained, platy; stained, shards; stained, vesiculated; stained; Lvvhv/Lvvw; stained; Lvvsv/Lvvmv; stained; Lvvu; stained; Lvvy; stained; total fragments with K-stain or Ca-stain or both; total; Volcanic glass; Volcanic glass, brown; Volcanic glass, clear; Volcanic glass, mafic; Volc glass; Volc glass brown; Volc glass clear; Volc glass mafic
Tipo

Dataset