The New Britain trench and 149° embayment,Western Solomon Sea |
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| Authors: | D L Tiffin H L Davies E Honza J Lock Y Okuda |
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| Institution: | (1) Present address: CCOP/SOPAC, Private Mail Bag, Suva, Fiji;(2) Bureau of Mineral Resources, GPO Box 378, ACT 2601 Canberra, Australia;(3) Geological Survey of Japan, 305 Tsukuba, Ibaraki, Japan |
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| Abstract: | The western New Britain Trench contains relatively thin sediment fill in the east, compared to the west where a sequence of thick turbidites is ponded behind a basement high in the trench axis, The trench trends toward Huon Gulf, but intersects the Trobriand Trench at an acute angle at the 149° Embayment, where both trenches end. Seismic structure west of the trench is incoherent, related to incipient collision of the Indian-Australia Plate and the South Bismarck Plate. The collision suture is marked by the Markham Canyon, continuous in its upper reaches with the Ramu-Markham Fault Zone on shore. |
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