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doi:10.2204/iodp.proc.302.102.2006 SummaryDuring the past four decades, significant efforts have been made to collect seismic reflection data over prominent features in the central Arctic Ocean. These efforts are noteworthy because of the difficulties in conducting operations in sea-ice-covered waters. Seismic data quality collected over the Lomonosov Ridge have significantly improved from the 1960–1980 ice island data, where only a thin sediment cover was detected, to the modern icebreaker surveys (with robust survey methodologies), where the true nature of the thick sediment cover has been imaged. The Arctic 1991 expedition collected the first high-quality seismic reflection data on the Lomonosov Ridge. These data formed the foundation of the proposed Expedition 302 program. Subsequent surveys (1996, 1998, 2001, and during Expedition 302) contributed to these data, resulting in a more complete geophysical interpretation of the Lomonosov Ridge, which is now being calibrated by the results from Expedition 302. |
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