Near‐seafloor overpressure in the deepwater Mississippi Canyon, northern Gulf of Mexico
Near‐seafloor overpressure in the deepwater Mississippi Canyon, northern Gulf of Mexico
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墨西哥湾北部密西西比峡谷深水区近海底超压
DOI：
10.1029/2007gl032275
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发表时间：
2008
影响因子：
5.2
通讯作者：
J. Germaine
中科院分区：
文献类型：
--
作者：
B. Dugan;J. Germaine
在墨西哥湾北方的密西西比峡谷地区的两个地点，实验室实验将超压（静水有效应力的25-50%）限制在30 mbsf以上。地点2562处的超压小于地点2567处的超压;但地点2562处的超压累积得更快。一维沉积固结模型在没有外部流体源的情况下无法重现超压。现场2567需要一个流体源（比排放量，q = 2-7 mm/年），而现场2562需要一个流体汇（q = 10-12 mm/年），以模拟受约束的超压。虽然基础条件不同，但海底的比流量为2.1-4.2毫米/年。每个站点的浅向上流、站点2567的深向上流和站点2562的深向下流与二维流场一致，其中站点2562和2567在水文上通过区域含水层在深度上连接。
Laboratory experiments constrain overpressure (25–50% of hydrostatic effective stress) above 30 mbsf at two sites in the Mississippi Canyon region, northern Gulf of Mexico. Overpressure at site 2562 is less than that at site 2567; however site 2562 has accumulated faster. One‐dimensional sedimentation‐consolidation models cannot recreate the overpressure without external fluid sources. A fluid source (specific discharge, q = 2–7 mm/yr) is required for site 2567, whereas a fluid sink (q = 10–12 mm/yr) is required for site 2562 to simulate the constrained overpressure. Although basal conditions differ, specific discharge of 2.1–4.2 mm/yr occurs at the sea floor. Shallow upward flow at each site, deep upward flow at site 2567 and deep downward flow at site 2562 is consistent with a two‐dimensional flow field where sites 2562 and 2567 are hydrologically connected at depth by a regional aquifer.
南开增生杂岩逆冲沉积物内的孔隙度损失：对超压的影响
DOI：
--
发表时间：
2002
期刊：
Geology 30
影响因子：
--
作者：
Screaton;E.;Saffer;D.;Henry;P.;Hunze;S.;Leg 190 Shipboard Scientific Party
通讯作者：
Leg 190 Shipboard Scientific Party