Seismicity and sedimentation rate effects on submarine slope stability
Seismicity and sedimentation rate effects on submarine slope stability
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DOI：
10.1130/g37866.1
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发表时间：
2016-07-01
期刊：
影响因子：
5.8
通讯作者：
Miller, N. C.
中科院分区：
文献类型：
--
作者：
ten Brink, U. S.;Andrews, B. D.;Miller, N. C.
通过提取10个大陆边缘的形态和地质参数之间的相关性，探讨了地震频率和沉积速率对海底斜坡稳定性的影响。边坡稳定性随地震频率的增加和沉积速率的减小而增加。这种稳定性的增加是非线性的（b < 0.5时的幂律），随着震间沉积物堆积的减少而加速。这种相关性被解释为反复地震引起的沉积物致密化和相关抗剪强度增加的证据。这种相关性的异常值可能识别构造活动导致斜坡相对快速过度变陡的边缘。
We explore the effects of earthquake frequency and sedimentation rate on submarine slope stability by extracting correlations between morphological and geological parameters in 10 continental margins. Slope stability increases with increasing frequency of earthquakes and decreasing sedimentation rate. This increase in stability is nonlinear (power law with b < 0.5), accelerating with decreasing interseismic sediment accumulation. The correlation is interpreted as evidence for sediment densification and associated shear strength gain induced by repeated seismic shaking. Outliers to this correlation likely identify margins where tectonic activity leads to relatively rapid oversteepening of the slope.