Opal concentration of ODP Leg 178 holes ...

• Main Authors: Hillenbrand, Claus-Dieter, Fütterer, Dieter K
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2001
• Subjects: Drilling/drill rig; Leg178; Joides Resolution; Ocean Drilling Program ODP; Antarc*; Antarctic; Antarctic Peninsula; Bellingshausen Sea; Southern Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.735190; https://doi.pangaea.de/10.1594/PANGAEA.735190

Neogene to Quaternary records of biogenic opal contents and opal accumulation rates are presented for Sites 1095, 1096, and 1101, which were drilled during Ocean Drilling Program Leg 178 in the Bellingshausen Sea, a marginal sea in the eastern Pacific sector of the Southern Ocean. The opal records in the drift sediments on the continental rise west of the Antarctic Peninsula provide signals of paleoproductivity, although they are influenced by dissolution in the water column and the sediment column. Opal contents at Sites 1095, 1096, and 1101 show similar long-term trends through the Neogene and Quaternary, whereas the opal accumulation rates exhibit marked discrepancies, which are caused by local differences in opal preservation linked to local variations of bottom current-induced supply of lithogenic detritus. We used a regression describing the relationship between opal preservation and sedimentation rate to extract the signal of primary opal deposition on the seafloor in the Bellingshausen Sea from the ... : Supplement to: Hillenbrand, Claus-Dieter; Fütterer, Dieter K (2001): Neogene to Quaternary deposition of opal on the continental rise west of the Antarctic Peninsula, ODP Leg 178, Sites 1095, 1096 and 1101. In: Barker, PF; Camerlenghi, A; Acton, GD; Ramsay, ATS (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 178, 1-33 (online) ...