PANGAEA_972120 Opal contents at IODP U1417 (Gulf of Alaska) during Late Miocne to Early Pleistocene Khim, Boo-Keun; Kim, Sunghan; Asahi, Hirofumi Opal contents at IODP U1417 (Gulf of Alaska) during Late Miocne to Early Pleistocene 2024-09-03 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.972120 Investigator Hirofumi Asahi asahi_hirofumi@icloud.com Earth Science Event label Sample code/label DEPTH, sediment/rock Depth, composite Opal, biogenic silica Lithologic unit/sequence geoscientificInformation 341-U1417D 341-U1417E biogenic opal Drilling/drill rig early Pleistocene Exp341 Gulf of Alaska IODP 341 Late Miocene U1417 DSDP/ODP/IODP sample designation Joides Resolution 2013-06-13 2013-06-17 Complete 56.95983 56.95983 -147.10997500000002 -147.10997500000002 276.685 m (DEPTH, sediment/rock) 707.48 m (DEPTH, sediment/rock) IODP Integrated Ocean Drilling Program / International Ocean Discovery Program unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 1764 data points text/tab-separated-values Khim, Boo-Keun; Kim, Sunghan; Asahi, Hirofumi (2026): Biogenic Opal Deposition in the Surveyor Fan (IODP Site U1417) in the Gulf of Alaska (North Pacific) During the Late Miocene to Early Pleistocene. Geochemistry, Geophysics, Geosystems, 27(2), e2025GC012173, https://doi.org/10.1029/2025GC012173 Jaeger, John M; Gulick, Sean P S; LeVay, Leah J; Asahi, H; Bahlburg, H; Belanger, Christina L; Berbel, Glaucia B Benedetti; Childress, Laurel B; Cowan, Ellen A; Drab, Laureen; Forwick, Matthias; Fukumura, A; Ge, Shemin; Gupta, S M; Kioka, Arata; Konno, S; März, C E; Matsuzaki, Kenji M; McClymont, Erin L; Mix, Alan C; Moy, Christopher M; Müller, J; Nakamura, A; Ojima, Takanori; Ridgway, K D; Rodrigues Ribeiro, F; Romero, Oscar E; Slagle, Angela L; Stoner, Joseph S; St-Onge, Guillaume; Suto, Itsuki; Walczak, Maureen H; Worthington, Lindsay L; IODP Expedition 341 Scientists (2014): Site U1417. In: Proceedings of the IODP, Integrated Ocean Drilling Program, https://doi.org/10.2204/iodp.proc.341.103.2014

International Ocean Discovery Program Site U1417 in the Surveyor (Gulf of Alaska) preserves the hemi-pelagic sediments influenced by the glacial and fluvi-al depositional from the Cordilleran Ice Sheet at the Chugach–St. Elias Mountains and Coast Ranges. A total of 441 samples covering the late Miocene to early Pleistocene were used to measure the biogenic opal content to trace the degree of diatom productivity in the surface water. In general, the biogenic opal content, fluctuating from less than 1% to a maximum of 48.6%, confirms the division of lithostratigraphic units and subunits: diatom-bearing clay-rich intervals vs clast-rich terrigenous intervals. The dataset presents Biogenic opal contents at U1417 from the Late Miocene to the Late Pleistocene, along with lithological units defined in the proceeding of IODP Expeition 341 (Jaeger et al., 2014). Biogenic opal contents at U1417 from the Late Miocene to the Late Pleistocene, along with lithological units defined in the proceeding of IODP Expeition 341 (Jaeger et al., 2014). ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.972120"!

https://doi.org/10.1029/2025GC012173 Biogenic Opal Deposition in the Surveyor Fan (IODP Site U1417) in the Gulf of Alaska (North Pacific) During the Late Miocene to Early Pleistocene https://doi.org/10.2204/iodp.proc.341.103.2014 Site U1417 https://hdl.handle.net/10013/epic.27914.d001 DSDP/ODP/IODP sample designation https://www.iodp.org/ IODP https://www-odp.tamu.edu:443/resolutn.html Joides Resolution DIF 9.4 2024-09-03 2026-09-04