Along‐Trench Structural Variations of the Subducting Juan de Fuca Plate From Multichannel Seismic Reflection Imaging

机译：沿着多通道地震反射成像沿着uhan de Fuca板的沟槽结构变体

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Abstract >To characterize the along‐strike structural variations of the Juan de Fuca (JdF) Plate as it enters the Cascadia subduction zone, we present prestack time migrated multichannel seismic reflection images of the JdF Plate along a 400‐km‐long trench‐parallel transect extending from 44.3°N to 47.8°N. Beneath the 1.8–3.0‐km‐thick sediment cover, our data reveal basement topographic anomalies associated with a 1.2‐km‐high seamount and in the vicinity of propagator wakes (390–540‐m relief). Weak Moho reflections are imaged beneath the propagator wakes and coincide with reduced Vp in the lower crust and/or uppermost mantle. The inferred locations of propagator wakes in the downgoing plate collocate with some of the boundaries of episodic tremor and slip events. We propose that the structural and hydration heterogeneities associated with these features could lead to anomalous plate interface properties and contribute to episodic tremor and slip segmentation. Intracrustal reflections with apparent dips (20°–30°) consistent with subduction bending normal faults change near 45.8°N, from northward dipping reflections confined to the middle crust in the north to antithetic reflections through the crust in the south, coinciding with a Vp reduction in the lower crust. These observations indicate more extensive faulting deformation and associated hydration of the JdF Plate south of 45.8°N, which likely results from variations of slab dip and resistance to subduction across 46°N. Basement offsets and abrupt depth/amplitude changes in Moho reflections are imaged beneath the four major WNW trending strike‐slip faults that cross the Cascadia deformation front, providing strong evidence of a lower plate origin for these faults. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> >，表征Juan de Fuca（JDF）板的沿罢工结构变体进入Cascadia俯冲区，我们沿着从44.3°N至47.8°N延伸的400公里长的沟槽平行的横截面呈现JDF板的PRESTACK时间迁移的多通道地震反射图像。在1.8-3.0米厚的沉积物封面下，我们的数据显示了与1.2公里高海米海的地下室地形异常，并在传播者唤醒附近（390-540-y浮雕）。弱Moho反射在传播者下面成像，并在下地壳和/或最上面的地幔中与vp减少。传播者的推断地点唤醒了正在进行的板上，并与诸多震颤和滑动事件的一些界限。我们提出与这些特征相关的结构和水合异质性可能导致异常板界面性质，并有助于扩展震颤和滑动分割。具有明显蘸酱（20°-30°）的颅内反射与俯冲逆转常见故障相一致，近45.8°N近45.8°N，从北方的倾斜反射局限于北方的中间地壳，通过南方的地壳，与vp恰逢vp减少较低的地壳。这些观察结果表明了45.8°N为45.8°N南部的JDF板的更广泛的断层变形和相关水合，这可能来自平板浸出的变化和跨越46°N的俯冲的变化。地下室偏移和Moho反射的突然深度/幅度变化在四个主要的WNW趋势击球故障下面成像，其越过Cascadia变形前线，提供了这些故障的较低板材原点的强大证据。</ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" >著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-34677/'>《Journal of geophysical research. Solid earth: JGR》</a> <b style="margin: 0 2px;">|</b><span>2018年第4期</span><b style="margin: 0 2px;">|</b><span>共25页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Han Shuoshuo&option=202" target="_blank" rel="nofollow">Han Shuoshuo;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Carbotte Suzanne M.&option=202" target="_blank" rel="nofollow">Carbotte Suzanne M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Canales Juan Pablo&option=202" target="_blank" rel="nofollow">Canales Juan Pablo;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Nedimovi? Mladen R.&option=202" target="_blank" rel="nofollow">Nedimovi? Mladen R.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Carton Hélène&option=202" target="_blank" rel="nofollow">Carton Hélène;</a> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> <p>Lamont‐Doherty Earth ObservatoryPalisades NY USA;</p> <p>Lamont‐Doherty Earth ObservatoryPalisades NY USA;</p> <p>Woods Hole Oceanographic InstitutionWoods Hole MA USA;</p> <p>Lamont‐Doherty Earth ObservatoryPalisades NY USA;</p> <p>Lamont‐Doherty Earth ObservatoryPalisades NY USA;</p> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li > <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span><a href="https://www.zhangqiaokeyan.com/clc/163.html" title="地球物理学">地球物理学;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cascadia subduction zone&option=203" rel="nofollow">Cascadia subduction zone;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Juan de Fuca Plate&option=203" rel="nofollow">Juan de Fuca Plate;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=multichannel seismic reflection imaging&option=203" rel="nofollow">multichannel seismic reflection imaging;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=subduction bending faulting&option=203" rel="nofollow">subduction bending faulting;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=propagator wakes&option=203" rel="nofollow">propagator wakes;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=strike‐slip faults&option=203" rel="nofollow">strike‐slip faults;</a> </p> <div class="translation"> 机译：Cascadia俯冲区;Juan de Fuca板;多通道地震反射成像;俯冲弯曲断层;传播者唤醒;走滑故障; </div> </li> <li> <span class="lefttit">入库时间</span> <span>2022-08-20 09:24:29</span> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025592495.html">Along‐Trench Structural Variations of the Subducting Juan de Fuca Plate From Multichannel Seismic Reflection Imaging</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Han Shuoshuo&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Han Shuoshuo,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Carbotte Suzanne M.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Carbotte Suzanne M.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Canales Juan Pablo&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Canales Juan Pablo,</a> <a href="/journal-foreign-34677/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of geophysical research. Solid earth: JGR .</a> <span>2018</span><span>,第4期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：沿着多通道地震反射成像沿着uhan de Fuca板的沟槽结构变体</span> </p> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/academic-journal-foreign_geology_thesis/020413049018.html">Morphology of the Explorer-Juan de Fuca slab edge in northern Cascadia: Imaging plate capture at a ridge-trench-transform triple junction</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=P. Audet&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">P. Audet,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=M. G. Bostock&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">M. G. Bostock,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=J.-P. Mercier&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">J.-P. Mercier,</a> <a href="/journal-foreign-9614/" target="_blank" rel="nofollow" class="tuijian_authcolor">Geology .</a> <span>2008</span><span>,第11期</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：卡斯卡迪亚北部Explorer-Juan de Fuca平板边缘的形态：在脊-沟槽-变换三重结处成像板捕获</span> </p> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/070405628783.html">Morphology of the Explorer–Juan de Fuca slab edge in northern Cascadia: Imaging plate capture at a ridge-trench-transform triple junction</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=P. Audet&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">P. Audet,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=M. G. 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Nedimovic </a> <a href="/conference-foreign-258041/" target="_blank" rel="nofollow" class="tuijian_authcolor">European Association of Geoscientists Engineers Conference Exhibition .</a> <span>2010</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：从重力和地震数据的Juan de Fuca脊的地壳结构的变化</span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/academic-degree-foreign_mphd_thesis/02061162543.html">Juan de Fuca subducting plate geometry and intraslab seismicity.</a> <b>[D] </b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Medema, Guy Frederick.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Medema, Guy Frederick. </a> <span>2006</span> </span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：胡安·德富卡俯冲板的几何形状和板内地震活动性。</span> </p> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-journal-foreign-pmc_detail_thesis/04000850523.html">Complete Genome Sequence of the Hyperthermophilic Archaeon Pyrococcus sp. Strain ST04 Isolated from a Deep-Sea Hydrothermal Sulfide Chimney on the Juan de Fuca Ridge</a> <b>[O] </b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Jong-Hyun Jung&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Jong-Hyun Jung,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ju-Hoon Lee&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Ju-Hoon Lee,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=James F. Holden&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">James F. 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