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首页> 外文期刊>Sedimentary geology >Subsurface structure of water-gas escape features revealed by ground-penetrating radar and electrical resistivity tomography, Glen Canyon National Recreation Area, Lake Powell delta, Utah, USA
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Subsurface structure of water-gas escape features revealed by ground-penetrating radar and electrical resistivity tomography, Glen Canyon National Recreation Area, Lake Powell delta, Utah, USA

机译：美国犹他州鲍威尔湖三角洲格伦峡谷国家游乐区的探地雷达和电阻层析成像揭示了水气逸出特征的地下结构

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摘要

Data gathered by electrical resistivity tomography (ERT) and ground-penetrating radar (GPR) were used to produce a three-dithensional image of subsurface soft-sediment deformation structures developed on the modern Lake Powell delta at Hite, Utah. ERT and GPR lines were run orthogonal across the crater. ERT resolved a low resistivity layer up to 2 m thick in the area near the vents within the crater. This low-resistivity layer thins toward the margins representing clays ejected from the vents. Below and adjacent to this layer is a high-resistivity layer that reflects delta top and pro-delta sands. The deepest zone recognized in the ERT profiles consists of a low resistivity layer, clay deposits that accumulated during the maximum lake high stand. This clay zone is connected to the vent within the crater by a conduit that changes diameter vertically. GPR profiles recognized the presence of collapse features restricted to the proximity of the vent. The geometry of the model is consistent with those proposed for marine pockmarks that can be generated seismically or aseismically with the exception of subaerial exposure after the dome stage development. (C) 2016 Elsevier B.V. All rights reserved.
机译：电阻层析成像（ERT）和探地雷达（GPR）收集的数据用于生成在犹他州海特市现代鲍威尔湖三角洲开发的地下软沉积物变形结构的三维三维图像。 ERT和GPR线垂直穿过整个火山口。 ERT解决了火山口内通风口附近区域高达2 m的低电阻率层。该低电阻率层向代表从通风孔喷出的粘土的边缘变薄。在该层下面并与之相邻的是一个高电阻率层，该反射层反映了三角洲上砂和三角洲前砂层。 ERT剖面中识别出的最深层包括低电阻率层，在最大湖泊高水位期间积聚的粘土沉积物。该粘土区通过垂直改变直径的导管连接到火山口内的通风口。 GPR剖面图表明存在限制于通风孔附近的塌陷特征。该模型的几何形状与为海洋麻雀提出的那些几何形状相吻合，该圆顶状可以通过地震或地震来产生，但穹顶阶段发展后的地下暴露除外。 （C）2016 Elsevier B.V.保留所有权利。

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