Overpressure and fluid flow in the New Jersey continental slope: Implications for slope failure and cold seeps
Overpressure and fluid flow in the New Jersey continental slope: Implications for slope failure and cold seeps
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DOI：
10.1126/science.289.5477.288
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发表时间：
2000-07-14
期刊：
影响因子：
56.9
通讯作者：
Flemings, PB
中科院分区：
文献类型：
--
作者：
Dugan, B;Flemings, PB
新泽西州大陆斜坡中新世至更新世沉积物（Ocean Drilling Program Site 1073）在海底以下640米处未压实（孔隙度在40%至65%之间），这被解释为记录流体压力达到静岩应力的95%。一个二维模型，其中快速更新世沉积负荷中新世渗透性砂质粉砂，成功地预测了观测到的压力。该模型描述了在覆盖层较薄的情况下，渗透层中的侧压力平衡如何产生接近静岩应力的流体压力。这种压力的转移可能会导致斜坡破坏，并在世界各地的被动边缘上驱动冷渗漏。
Miocene through Pleistocene sediments on the New Jersey continental slope (Ocean Drilling Program Site 1073) are undercompacted (porosity between 40 and 65%) to 640 meters below the sea floor, and this is interpreted to record fluid pressures that reach 95% of the lithostatic stress. A two-dimensional model, where rapid Pleistocene sedimentation loads permeable sandy silt of Miocene age, successfully predicts the observed pressures. The model describes how lateral pressure equilibration in permeable beds produces fluid pressures that approach the lithostatic stress where overburden is thin. This transfer of pressure may cause slope failure and drive cold seeps on passive margins around the world.