Permeability and pressure measurements in Lesser Antilles submarine slides: Evidence for pressure-driven slow-slip failure
文献类型：期刊论文
| 作者 | Hornbach, Matthew J.1; Manga, Michael2; Genecov, Michael1; Valdez, Robert3; Miller, Peter3; Saffer, Demian3; Adelstein, Esther2; Lafuerza, Sara4; Adachi, Tatsuya5; Breitkreuz, Christoph6 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2015-12-01 |
| 卷号 | 120期号:12页码:7986-8011 |
| DOI | 10.1002/2015JB012061 |
| 文献子类 | Article |
| 英文摘要 | Recent studies hypothesize that some submarine slides fail via pressure-driven slow-slip deformation. To test this hypothesis, this study derives pore pressures in failed and adjacent unfailed deep marine sediments by integrating rock physics models, physical property measurements on recovered sediment core, and wireline logs. Two drill sites (U1394 and U1399) drilled through interpreted slide debris; a third (U1395) drilled into normal marine sediment. Near-hydrostatic fluid pressure exists in sediments at site U1395. In contrast, results at both sites U1394 and U1399 indicate elevated pore fluid pressures in some sediment. We suggest that high pore pressure at the base of a submarine slide deposit at site U1394 results from slide shearing. High pore pressure exists throughout much of site U1399, and Mohr circle analysis suggests that only slight changes in the stress regime will trigger motion. Consolidation tests and permeability measurements indicate moderately low (similar to 10(-16)-10(-17)m(2)) permeability and overconsolidation in fine-grained slide debris, implying that these sediments act as seals. Three mechanisms, in isolation or in combination, may produce the observed elevated pore fluid pressures at site U1399: (1) rapid sedimentation, (2) lateral fluid flow, and (3) shearing that causes sediments to contract, increasing pore pressure. Our preferred hypothesis is this third mechanism because it explains both elevated fluid pressure and sediment overconsolidation without requiring high sedimentation rates. Our combined analysis of subsurface pore pressures, drilling data, and regional seismic images indicates that slope failure offshore Martinique is perhaps an ongoing, creep-like process where small stress changes trigger motion. |
| WOS关键词 | SOUFRIERE HILLS VOLCANO ; TROUGH SUBDUCTION ZONE ; MARINE-SEDIMENTS ; PORE PRESSURE ; CONTINENTAL-SLOPE ; FLUID PRESSURES ; FLANK-COLLAPSE ; ISLAND-ARC ; OVERPRESSURE DETECTION ; UNDERTHRUST SEDIMENTS |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000372204600003 |
| 资助机构 | National Science Foundation ; National Science Foundation ; National Science Foundation ; National Science Foundation |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/62028]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 作者单位 | 1.So Methodist Univ, Dept Earth Sci, Dallas, TX 75275 USA 2.Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA 3.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA 4.Univ Paris 06, Inst Sci Terre, Paris, France 5.Yamagata Univ, Grad Sch Sci & Engn, Yamagata 990, Japan 6.Tech Univ Bergakad Freiberg, Dept Geol & Paleontol, D-09596 Freiberg, Germany 7.Natl Oceanog Ctr, Southampton, Hants, England 8.Univ Paris Diderot, Inst Phys Globe Paris, Sorbonne Paris Cite, UMR 7175,CNRS, Paris, France 9.Geol Survey Japan, AIST, Tsukuba, Ibaraki 305, Japan 10.Univ Leicester, Dept Geol, Leicester LE1 7RH, Leics, England |
| 推荐引用方式 GB/T 7714 | Hornbach, Matthew J.,Manga, Michael,Genecov, Michael,et al. Permeability and pressure measurements in Lesser Antilles submarine slides: Evidence for pressure-driven slow-slip failure[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2015,120(12):7986-8011. |
| APA | Hornbach, Matthew J..,Manga, Michael.,Genecov, Michael.,Valdez, Robert.,Miller, Peter.,...&Wang, Fei.(2015).Permeability and pressure measurements in Lesser Antilles submarine slides: Evidence for pressure-driven slow-slip failure.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,120(12),7986-8011. |
| MLA | Hornbach, Matthew J.,et al."Permeability and pressure measurements in Lesser Antilles submarine slides: Evidence for pressure-driven slow-slip failure".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 120.12(2015):7986-8011. |
入库方式： OAI收割
来源：地质与地球物理研究所
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