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| | Abstract | | In 2017 an high-resolution 2d shallow hazard marine seismic survey was conducted on the Lord Howe Rise, a submerged continental ribbon off the east coast of Australia. This KR17-15C survey was the second of two site surveys acquired to support proposed deep riser drilling on the Lord Howe Rise under the International Ocean Discovery Program. An earlier survey undertaken in 2016 (KR16-05) investigated the geological structure at the proposed Lord Howe Rise drill sites. The KR17-15C survey acquired data for a hazard, environmental, and geotechnical assessment of the proposed drill sites. A total of 190 km of high-resolution seismic data was acquired along 10 lines at the primary and two alternate riser drilling sites. Acquisition parameters were optimized to achieve a high-resolution image of the sub-surface to depths of 1 km. but the resulting data imaged geology to the top of acoustic basement at 4 km depth. We will show that the KR17-15C high resolution seismic images are better suited for pre-drilling hazard and geotechnical assessments than the KR16-05 data that was acquired with standard acquisition parameters along the same survey lines. Preliminary interpretation of the high-resolution seismic data will also be presented. |
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