New PDF release: Island Arcs, Deep Sea Trenches and Back-Arc Basins

By Manik Talwani, Walter C. Pitman III

ISBN-10: 0875904009

ISBN-13: 9780875904009

ISBN-10: 1118665759

ISBN-13: 9781118665756

About The Product

Published by means of the yankee Geophysical Union as a part of the Maurice Ewing Series.

A 3 day symposium used to be held in honor of the overdue Maurice Ewing at Arden residence, Harriman, big apple on March 28-31, 1976. The symposium is the 1st of a deliberate Maurice Ewing sequence of symposiums to be held biennially. the yankee Geophysical Union has agreed to submit the lawsuits of the symposiums in a unique Maurice Ewing sequence. This quantity represents the 1st of the sequence.


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Extra resources for Island Arcs, Deep Sea Trenches and Back-Arc Basins

Example text

A.. c UJ LLJ t- UJ u --I ::I: 9 0::: oI HORIZONTAL SCALE , 5 10 KILOMETRES I Fig. 6. Seismic-reflection profile across part of wedge south of Java. The Java Trench is to the left of this segment with a water depth of about 6 km (8 sec), and the crest of the outer-arc ridge is to the right, with a depth of less than 3 km. Imbricate structure dips moderately north, sharply disharmonic to the very gently dipping top (A-A') of the undersliding oceanic plate beneath. 8 to about 5 km/sec. Profile provided by Shell Internationale Petroleum Maatschappij N.

5 km deep, and it marks the dihedral angle of the sea floor between the subducting Australian-New Guinea continental shelf and the top of the accretionary wedge of imbricated rocks and melangeo Figure 8 illustrates this relationship at Seram. Deep-penetration profiles show the same features at many other places around the arc (Beck and Lehner, 1974; Crostella and Powell, 1976; MQ;'t~ 1976)0 The identity of the strongly reflecting shelf strata beneath the trench on such profiles was confirmed by Hole 262 of the Deep Sea Drilling Project: south of Timor, shallow-water upper Pliocene carbonates lie beneath the trench fill (Veevers and Heirtzler, 1974, p.

Seismic-reflection profile across the Banda arc system in the Timor sector. Australian shelf strata plane into the trench. The shallow structure of the Timor-Roti ridge is here anticlinorial. No trench is present within the Savu Basin. V. Robert Conrad Cruise 14. Fig. 10 (bottom). Seismic-reflection profile across the Banda Arc system near Tanimbar. Shelf strata, on the right, continue with gentle dip beneath the low-velocity acoustic basement of Tanimbar, although this can not be seen on this shallow-penetration line.

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Island Arcs, Deep Sea Trenches and Back-Arc Basins by Manik Talwani, Walter C. Pitman III

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