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Causes of earthquake spatial distribution beneath the Izu-Bonin-Mariana Arc

机译：伊豆-波宁-马里亚纳弧下地震空间分布的成因

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摘要

Statistics about the occurrence frequency of earthquakes (1973-2015) at shallow, intermediate and great depths along the Izu-Bonin-Mariana (IBM) Arc is presented and a percent perturbation relative to P-wave mean value (LLNL-G3Dv3) is adopted to show the deep structure. The correlation coefficient between the subduction rate and the frequency of shallow seismic events along the IBM is 0.605, proving that the subduction rate is an important factor for shallow seismic events. The relationship between relief amplitudes of the seafloor and earthquake occurrences implies that some seamount chains riding on the Pacific seafloor may have an effect on intermediate-depth seismic events along the IBM. A probable hypothesis is proposed that the seamounts or surrounding seafloor with high degree of fracture may bring numerous hydrous minerals into the deep and may result in a different thermal structure compared to the seafloor where no seamounts are subducted. Fluids from the seamounts or surrounding seafloor are released to trigger earthquakes at intermediate-depth. Deep events in the northern and southern Mariana arc are likely affected by a horizontal propagating tear parallel to the trench.
机译：给出了沿伊豆-波宁-马里亚纳（IBM）弧的浅，中，深深度地震发生频率（1973-2015）的统计数据，并采用了相对于P波平均值（LLNL-G3Dv3）的摄动百分比显示深层结构。沿IBM的俯冲率与浅层地震事件发生频率之间的相关系数为0.605，证明了俯冲率是造成浅层地震事件的重要因素。海底的起伏幅度与地震发生之间的关系意味着，在太平洋海底上骑行的一些海山链可能会对沿IBM的中深度地震事件产生影响。提出了一个可能的假设，即与未俯冲海底的海底相比，具有高度断裂程度的海底或周围海底可能会将大量含水矿物带入深部，并可能导致不同的热结构。来自海山或周围海底的流体被释放，以触发中等深度的地震。北部和南部马里亚纳弧线的深部事件很可能受到平行于沟渠的水平传播裂缝的影响。

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  • 来源
    《Journal of Asian earth sciences》 |2018年第1期|90-100|共11页
  • 作者

    Kong Xiangchao; Li Sanzhong; Wang Yongming; Suo Yanhui; Dai Liming; Geli Louis; Zhang Yong; Guo Lingli; Wang Pengcheng;

  • 作者单位

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266235, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266235, Peoples R China|Ifremer, Inst Carnot Ifremer EDROME, Marine Geosci Dept, BP 70, F-266235 Plouzane, France;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

    Ocean Univ China, Coll Marine Geosci, Key Lab Submarine Geosci & Prospecting Tech, Minist Educ, Qingdao 266100, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Philippine Sea Plate; Pacific Plate; Earthquake; Seamount; Slab tear; Subduction rate;

    机译：菲律宾海板;太平洋板块;地震;海山;平板撕裂;俯冲率;

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