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Sedimentation and subsidence history of the Lomonosov Ridge

Record type: Conference or Workshop Item (Paper)

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 ~88°N, 140°E (see Fig. F18 in the "Sites M0001–M0004" chapter). The ridge was rifted from the Eurasian continental margin at ~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).
The sections recovered from the four sites drilled during Expedition 302 can be correlated using their seismic signature, physical properties (porosity, magnetic susceptibility, resistivity, and P-wave velocity), chemostratigraphy (ammonia content of pore waters), lithostratigraphy, and biostratigraphy. The lithostratigraphy of the composite section combined with biostratigraphy provides an insight into the complex history of deposition, erosion, and preservation of the biogenic fraction. Eventually, the ridge subsided to its present water depth as it drifted from the Eurasian margin. In this chapter, we compare a simple model of subsidence history with the sedimentary record recovered from atop the ridge.

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Citation

Moore, T.C., Backman, J., Moran, K., McInroy, D., Brinkhuis, H.K., Clemens, S., Cronin, T., Dickens, G.R., Eynaud, F., Gattacceca, J., Jakobsson, M., Jordan, R.W., Kaminski, M., King, J., Koç, N., Martinez, N.C., Matthiessen, J., Onodera, J., O'Regan, M., Pälike, H., Rea, B.R., Rio, D., Sakamoto, T., Smith, D.C., Stein, R., St. John, K.E.K., Suto, I., Suzuki, N., Takahashi, K., Watanabe, M. and Yamamoto, M., (2006) Sedimentation and subsidence history of the Lomonosov Ridge Backman, J., Moran, K., McInroy, D.B. and Mayer, L.A. (eds.) In Proceedings of the Integrated Ocean Drilling Program, Vol. 302. Integrated Ocean Drilling Program Management International, Inc., 70pp. (doi:10.2204/iodp.proc.302.105.2006).

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Published date: 7 March 2006

Identifiers

Local EPrints ID: 41918
URI: http://eprints.soton.ac.uk/id/eprint/41918
PURE UUID: b0786efd-60f8-49e6-ba9c-a747c1655189

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Date deposited: 16 Oct 2006
Last modified: 17 Jul 2017 15:25

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Contributors

Author: T.C. Moore
Author: J. Backman
Author: K. Moran
Author: D. McInroy
Author: H.K. Brinkhuis
Author: S. Clemens
Author: T. Cronin
Author: G.R. Dickens
Author: F. Eynaud
Author: J. Gattacceca
Author: M. Jakobsson
Author: R.W. Jordan
Author: M. Kaminski
Author: J. King
Author: N. Koç
Author: N.C. Martinez
Author: J. Matthiessen
Author: J. Onodera
Author: M. O'Regan
Author: H. Pälike
Author: B.R. Rea
Author: D. Rio
Author: T. Sakamoto
Author: D.C. Smith
Author: R. Stein
Author: K.E.K. St. John
Author: I. Suto
Author: N. Suzuki
Author: K. Takahashi
Author: M. Watanabe
Author: M. Yamamoto
Editor: J. Backman
Editor: K. Moran
Editor: D.B. McInroy
Editor: L.A. Mayer

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