Fine structure of methane hydrate-bearing sediments on the Blake Outer ridge as determined from deep-tow multichannel seismic data. (Reannouncement with new availability information). Final report
Fine structure of methane hydrate-bearing sediments on the Blake Outer ridge as determined from deep-tow multichannel seismic data. (Reannouncement with new availability information). Final report
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DOI：
10.1029/92jb01706
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发表时间：
1993-01
期刊：
影响因子：
--
通讯作者：
M. Rowe;J. Gettrust
中科院分区：
文献类型：
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作者：
M. Rowe;J. Gettrust
利用高分辨率深拖曳多道地震资料研究了含甲烷水合物沉积物的详细结构。这些数据支持厚的、横向广泛的含甲烷水合物沉积物层，下面是一个底部模拟反射器（BSR），以及在BSR深度以上不存在BSR的沉积物中水合物的空间不连续带。这些数据解决了从地表延伸到BSR的正常断层，其表观偏移可达20米。在BSR顶部识别的相反演表明，BSR下方的物质具有异常低的速度，与含有游离甲烷气体的沉积物层一致。断层沿BSR偏移，与压力变化近似一致。200kpa（约）2条)横跨断裂带....定向环境噪声，海底散射，深拖曳阵地球物理系统，拖曳阵，海底地震仪
High-resolution, deep-tow multichannel seismic data are used to investigate the detailed structure of sediments containing methane hydrate. These data support thick, laterally extensive layers of methane hydrate-bearing sediment underlain by a bottom simulating reflector (BSR) and spatially discontinuous zones of hydrate within the sediments above the BSR depth where no BSR is present. These data resolve normal faults which extend from the surface through the BSR with apparent offsets of up to 20 m. A phase inversion identified at the top of the BSR shows that the material immediately beneath the BSR has anomalously low velocity, consistent with a layer of sediment containing free methane gas. The fault offsets along the BSR and consistent with a pressure change of approx. 200 kPa (approx. 2 bars) across the fault zone.... Directional ambient noise, Bottom scattering, Deep-towed array geophysical system, Towed array, Ocean-bottom seismometer