Correlation of side-scan backscatter intensity with grain-size distribution of shelf sediments, New Jersey margin |
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Authors: | J A Goff H C Olson C S Duncan |
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Institution: | (1) Institute for Geophysics, University of Texas, Austin TX 78759, USA e-mail: goff@utig.ig.utexas.edu, US;(2) Department of Geological Sciences, University of Texas, Austin TX 78712, USA, US |
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Abstract: | The dependence of acoustic backscatter variations on sediment grain-size distribution is examined using a combined analysis
of 95 kHz side-scan data and approx. 300 grab samples from the New Jersey margin. We show that, under well-controlled circumstances,
an unprecedented degree of correlation can be obtained between backscatter intensity and mean grain size. However, backscatter
is disproportionately affected by larger grain sizes. Addition of just a few extra weight percentage of the larger grain sizes
(>4 mm), which in our study is typically represented by more abundant shell hash among the older sediments at greater water
depths, can completely degrade this correlation.
Received: 29 September 1999 / Revision accepted: 14 February 2000 |
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