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The AAPG/Datapages Combined Publications Database

Journal of Petroleum Geology

Abstract

Journal of Petroleum Geology, Vol.3, No.3, pp. 315-324, 1981

©Copyright 2000 Scientific Press, Ltd.

PROBABLE GAS HYDRATE IN CONTINENTAL SLOPE EAST OF THE NORTH ISLAND, NEW ZEALAND

Hans-Rudolf Katz*

*New Zealand Geological Survey, P.O. Box 30368, Lower Hutt, New Zealand.

Abstract

Anomalous seismic horizons which (1) are strongly reflective, i.e. have a high impedance contrast; (2) cut across bedding planes of sediments; (3) are subparallel with the sea floor; and (4) increase their sub-bottom depth with increasing depth of sea floor (and thus with decreasing temperature of bottom water) are tentatively identified as the base of a gas hydrate layer. The anomalous reflections occur below waters 1000-2500m deep, and along 500km of the continental slope. Some 10-20,000 sq km appear to be underlain by gas hydrates.

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