Abstract
In April 1972 Mobil Oil Corporation’s research vessel M/V FRED H. MOORE traversed several JOIDES Leg 21 drill sites on the southern Lord Howe Rise. The combination of these drilling results and Mobil’s high-quality seismic records provides important insights into the geology of this area. Neogene and Paleogene sedimentary thicknesses observed on our seismic records and derived from sonobuoy refraction measurements show a much greater degree of diversity than could be deduced from JOIDES data alone. Cenozoic thicknesses of about 3,000 m recorded in the New Caledonia Basin are most likely due to large-scale slumping from the flanks of the Lord Howe Rise and the Norfolk Ridge. Rapid sedimentary thickness changes from 0 to 1,300 m on top of the Lord Howe Rise are largely caused by a strong Neogene unconformity, beveling the highly block faulted Paleogene and older section. New seismic evidence strongly suggests the occurrence of continuous, explosive-type deep-water vulcanism throughout the Cenozoic. This region represents a margin between oceanic and “intermediate” crust (which in Late Cretaceous was at sea level).
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Bibliography
Andrews, J. E., 1973, Correlation of seismic reflectors, in Initial reports of the Deep Sea Drilling Project, v. X XI: Washington, D. C., U.S. Govt. Printing Office.
Brown, D. A., Campbell, K. S. W., and Crook, K. A. W., 1968, The geological evolution of Australia and New Zealand: Elmsford, N.Y., Pergamon Press.
Burns, D., Watters, W. A., and Webb, P. N., 1973, Site 207, in Initial reports of the Deep Sea Drilling Project, v. X XI: Washington, D.C., U.S. Govt. Printing Office.
Burns, D., and Webb, P. N., 1973, Site 206 and Site 208, in Initial reports of the Deep Sea Drilling Project, v. X XI: Washington, D.C., U.S. Govt. Printing Office.
Burns, R. E., and Andrews, J. E., 1973, Regional aspects of deep-sea drilling in the Southwest Pacific, in Initial reports of the Deep Sea Drilling Project, v. X XI: Washington, D.C., U.S. Govt. Printing Office.
Burns, R. E., and Andrews, J. E., et al., 1972, Glomar Challenger down under: Geotimes, May 1972.
Cotton, D. A., 1969, Volcanoes as landscape forms: New York, Hafner Press.
Edwards, A. R., 1973, Southwest Pacific regional unconformities encountered during Leg 21, in Initial reports of the Deep Sea Drilling Project, v. X XI: Washington, D.C., U.S. Govt. Printing Office.
Hayes, D. E., and Ringis, T., 1973, Seafloor-spreading in the Tasman Sea: Nature, v. 243, June 22.
Houtz, R., Ewing, J., Ewing, M., and Lonardi, A. G., 1967, Seismic reflection profiles of the New Zealand Plateau: Jour. Geophys. Res., v. 72, no. 18.
Van der Lingen, G. J., 1973, The Lord Howe Rise rhyolites, in Initial reports of the Deep Sea Drilling Project, v. X XI: Washington, D.C., U.S. Govt. Printing Office.
Woodward, D. J., and Hunt, T. M., 1971, Crustal Structures across the Tasman Sea: New Zealand Jour. Geol. Geophys., v. 14, no. 1.
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Bentz, F.P. (1974). Marine Geology of the Southern Lord Howe Rise, Southwest Pacific. In: Burk, C.A., Drake, C.L. (eds) The Geology of Continental Margins. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-01141-6_38
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DOI: https://doi.org/10.1007/978-3-662-01141-6_38
Publisher Name: Springer, Berlin, Heidelberg
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