Unknown
PANGAEA
In:
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, https://doi.org/10.2973/odp.proc.sr.198.108.2005
Publication Date:
2024-01-09
Description:
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.
Keywords:
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; DRILL; Drilling/drill rig; Joides Resolution; Leg126; Leg198; North Pacific Ocean; Ocean Drilling Program; ODP; Philippine Sea
Type:
Dataset
Format:
application/zip, 2 datasets
Permalink
|
Location |
Call Number |
Expected |
Availability |
