A seismic refraction experiment in the central Banda Sea
Citable URI
https://hdl.handle.net/1912/10396DOI
10.1575/1912/10396Keyword
Seismic refraction methodAbstract
A seismic refraction experiment in the central Banda Sea is interpreted by using both slope intercept
and delay time function methods. The crustal structure is shown to be oceanic, with velocities (4.97, 6.47,
7.18, and 7.97 km/s) typical of oceanic layers 2, 3A, and 3B and the mantle. Individual layer thicknesses
va ry systematica lly along the line, though the range of thicknesses observed for layers 2 ( 1.5-2.0 km) and
3A (2.0-3.5 km) falls well within the range observed for normal oceanic crust. Layer 3B is unusually thick
(2.5-4.6 km), the result being slightl y greater than normal depths-to Moho of9-IO km below the sea floor.
Shear head waves from layers 3A and 3B are identified on two receivers. In both cases, shear wave
conversion occurred at the sediment/layer 2 interface. The observed shear wave velocities and intercepts
indicate a Poisson's ratio of 0.25-0.28 in layer 3 and ~0.33 in layer 2. These and earlier results from the
southern Banda basin indicate that the entire Banda Sea is underlain by oceanic type crust.
Description
Also published as: Journal of
Geophysical Research 83 (1978): 2247-2257
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Suggested Citation
Purdy, G. M., & Detrick, R. S. (1979). A seismic refraction experiment in the central Banda Sea. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/10396Related items
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