Spinelli, Glenn A.; Hutton, Ashley (2013): Amorphous silica content of sediment from Sites C0011 and C0012 in the Shikoku Basin on the NanTroSEIZE transect. IODP Management International, Washington, DC, United States, In: Underwood, Michael B., Saito, Saneatsu, Kubo, Yu'suke, Sanada, Yoshinori, Chiyonobu, Shun, Destrigneville, Christine, Dugan, Brandon, Govil, Pawan, Hamada, Yohei, Heuer, Verena, Huepers, Andre, Ikari, Matt, Kitamura, Yujin, Kutterolf, Steffen, Labanieh, Shasa, Moreau, John, Naruse, Hajime, Oda, Hirokuni, Park, Jin-Oh, Pickering, Kevin T., Scudder, Rachel, Slagle, Angela, Spinelli, Glenn A., Torres, Marta, Tudge, Joanne, Wu Huaichun, Yamamoto, Tomohiro, Yamamoto, Yuzuru, Zhao, Xixi, Proceedings of the Integrated Ocean Drilling Program; NanTroSEIZE Stage 2; subduction inputs; Expedition 322 of the riser drilling platform, Yokkaichi, Japan, to Shingu, Japan; Sites C0011 and C0012, 1 September-10 October 2009, 322, georefid:2013-018341

Abstract:

We determined the amorphous silica content of sediment from two sites in Shikoku Basin along the Nankai Trough Seismogenic Zone Experiment transect, offshore southern Japan. We examined hemipelagic mud from Sites C0011 and C0012 cored during Expeditions 322 and 333 of the Integrated Ocean Drilling Program. We determined amorphous silica content using an alkaline leaching technique. Amorphous silica content is < or =1.1 wt% in all samples. Amorphous silica content is higher in the shallow sediment (lithologic Subunit IA) than in the deeper sediment. At Site C0011, amorphous silica content decreases from 0.75.1.10 wt% in Subunit IA (above 252 meters below seafloor [mbsf]) to 0.13.0.59 wt% in deeper lithologic units (below 252 mbsf). At Site C0012, four samples from Subunit IA contain 0.58.0.66 wt% amorphous silica; samples from deeper lithologic units contain 0.13.0.40 wt% amorphous silica.

Coverage:

West: 136.5254 East: 136.5501 North: 32.4945 South: 32.4453

Relations:

Expedition: 319

Site: 319-C0011

Expedition: 322

Site: 322-C0011

Site: 322-C0012

Expedition: 333

Site: 333-C0011

Site: 333-C0012

Expedition: 338