Sedimentation and subsidence history of the Lomonosov Ridge

• Main Author: Moore, T C
• Format: Book Chapter
• Language: English
• ISSN: 1930-1014; 1930-1014
• DOI: 10.2204/iodp.proc.302.105.2006

During the first scientific ocean drilling expedition to the Arctic Ocean (Arctic Coring Expedition [ACEX]; Integrated Ocean Drilling Program Expedition 302), four sites were drilled and cored atop the central part of the Lomonosov Ridge in the Arctic Ocean at similar to 88 degree N, 140 degree E (see Fig. F18 in the "Sites M0001-M0004" chapter). The ridge was rifted from the Eurasian continental margin at similar to 57 Ma (Fig. F1) (Jokat et al., 1992, 1995). Since the rifting event and the concurrent tilting and erosion of this sliver of the outer continental margin, the Lomonosov Ridge subsided while hemipelagic and pelagic sediments were deposited above the angular rifting unconformity (see Fig. F7A in the "Sites M0001-M0004" chapter).