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首页> 外文会议>Rock mechanics for resources, energy and environment >Beachrock mapping by geophysical exploration: Application toYagaji Island in Okinawa, Japan
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Beachrock mapping by geophysical exploration: Application toYagaji Island in Okinawa, Japan

机译：地球物理勘探对滩石进行制图：在日本冲绳县八aga岛的应用

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摘要

Beachrock, a type of sedimentary bedrock composed of beach deposits, is expected to restrainrncoastal erosion by preventing the outflow of sand.To artificially create beachrocks, we need data on the chemicalrnand physical properties of this rock. In this study, we conducted a Direct Current (DC) electrical survey and arnseismic surfacewave survey to investigate the underground structures of the beachrock inYagaji Island, Okinawa,rnJapan. In order to estimate the effectiveness of the geophysical surveys, we conducted laboratory tests to measurernthe resistivity, the shear wave velocity, and the porosity of beachrock samples collected from the study site. Onrnthe basis of these results, we estimated the beachrock structure as follows: The beachrock is detected as a highrnresistivity and high velocity zone, which is 1–2m thick. A sand layer under the beachrock is represented as arnlow resistivity and low velocity zone.
机译：沙滩岩是一种由海滩沉积物组成的沉积性基岩，有望通过防止沙子的流出来抑制海岸侵蚀。要人为地制造沙滩岩，我们需要有关该岩石的化学和物理性质的数据。在这项研究中，我们进行了直流（DC）电勘测和地震地表波勘测，以调查日本冲绳县雅加吉岛海滩岩石的地下结构。为了评估地球物理勘测的有效性，我们进行了实验室测试以测量从研究地点收集的滩涂样品的电阻率，剪切波速度和孔隙率。在这些结果的基础上，我们估算滩涂结构如下：滩涂被检测为高电阻率和高速度带，厚度为1-2m。海滩岩石下面的砂层表示为阿尔诺电阻率和低速区。

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