Seismic trenching by shallow hi-resolution seismic reflection method

浅层高分辨率地震反射法地震挖沟

• 批准号: 06452410
• 负责人: ITO Tanio
• 金额: $ 4.8万
• 依托单位: Faculty of Science, Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452410/
• 关键词: SHALLOW SEISMIC REFLECTION; SEISMIC TRENCHING; YUATSU IMPACTOR; HI-RESOLUTION EXPLORATION

The purpose of this research is to establish the system of "seismic trenching by shallow hi-resolution seismic reflection method". The system is composed of the Yuatsu Impactor (Seimic source) and the iXL (Data processing). The former was made by the cooperative work of Chiba University, GSI,and Mitsubishi Juko in 1993 before the begining of this research project. The latter was prepared by this grant. The following points are essential for the improvement of the system.1.In order to save time in surveying shot and receiving points, we combine bothe Total Station and DGPS systems. Thus, we can get the results of surveying immediately and put them into the iXL smoothly.2.Seismic trenching requires dense distribution of both shot and receiving points. This inevitably brings tangle of lines and cables. Thus we abolish a trigger cable from the impactor and set the wireless trigger system between the impactor and a recording system.3.Seismic trenching often requires 3-component geophones. For this case, we prepare a portable oscilloscope for monitoring seismic wave in field.We confirm the system of "seismic trenching" has been basically established through this research project.

本研究的目的是建立“浅层高分辨率地震反射法地震沟槽”体系。该系统由YYATSU冲击器(震源)和IXL(数据处理)组成。前者是由千叶大学、GSI和三菱Juko于1993年在本研究项目开始之前合作制作的。后者是由这笔赠款准备的。1.为了节省测点和接收点的时间，我们将全站仪和DGPS系统结合起来。因此，我们可以立即得到测量结果，并将其平滑地放入iXL中。2.地震开挖要求炮点和接收点分布密集。这不可避免地带来了线路和电缆的纠缠。因此，我们取消了冲击器上的触发电缆，并在冲击器和记录系统之间设置了无线触发系统。3.地震挖沟通常需要三分量检波器。针对这种情况，我们研制了一种便携式示波器，用于现场监测地震波，通过该研究项目，我们确认了“地震槽”系统已经基本建立。

项目成果

山北 聡・伊藤谷生・田中秀実・渡辺弘樹: "古期中央構造線としての佐志生断層の前期漸新世におけるtop-to-the-west斜め衝上運動" 地質学雑誌. 101. 978-988 (1995)

Satoshi Yamakita、Tanio Ito、Hidemi Tanaka 和 Hiroki Watanabe：“作为古中位构造线的 Sashiu 断层早渐新世的自顶向西斜冲运动”地质杂志 101. 978-988 (1995)。

Abe,S.: "Basic study of the shallow high-resolution seismic reflection method" EOS. 75. 456 (1994)

Abe,S.：“浅层高分辨率地震反射方法的基础研究”EOS。

Yamakita, S., Ito, T., Tanaka, H.and Watanabe, H.: "Early Oligocene top-to-the west motion along the Sashu fault, a low-angle oblique thrust of the Paleo-Median Tectonic Line, east Kyushu, Japan." Journ.Geol.Soc.Japan. 101. 978-988 (1996)

Yamakita, S.、Ito, T.、Tanaka, H. 和 Watanabe, H.：“早渐新世沿 Sashu 断层自上而下的运动，是古中位构造线的低角度斜冲断层，东

伊藤谷生: "小型油圧インパクター震源CMJ-MINI65の研究試作について" 日本地震学会講演予稿集. 1994年NO.2. 93 (1994)

伊藤谷雄：《小型液压冲击器震源CMJ-MINI65的研究原型》日本地震学会学报1994年第93期（1994年）。

Kiyoshi Suyechiro, Toshihiko Kanazawa, Naoshi Hirata, Masanao Shinohara: "Ocean Downhole Seismic Project" Journal of Physics of the Earth. 43. 599-618 (1995)

Kiyoshi Suyechiro、Toshihiko Kanazawa、Naoshi Hirata、Masanao Shinohara：“海洋井下地震项目”地球物理学杂志。