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Boundary Element Modeling of Two‐Plate Interaction at Subduction Zones: Scaling Laws and Application to the Aleutian Subduction Zone

机译:俯冲区两板互动的边界元建模:缩放法律与施加到阿勒斯郊区区

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Abstract > This work uses the boundary element method (BEM) to explore the dynamics of subduction of a dense lithospheric plate (subducting plate, SP) beneath an overriding plate (OP). For simplicity, the model is two dimensional, the plates are purely viscous, and the ambient fluid is infinitely deep. The negative buoyancy of the slab is the only driving force of the system. First, we study the SP kinematics focusing on two characteristic instantaneous velocities: the convergence speed ( V <sub>Conv</sub> ) of the descending slab and the horizontal plate speed ( U <sub>SP</sub> ) of the flat portion of the SP. We find that V <sub>Conv</sub> is entirely controlled by the slab's geometry, by the width of the lubrication layer d <sub>2</sub> separating the SP and the OP, and by the SP's flexural stiffness St. Turning to U <sub>SP</sub> , we find that this parameter depends not only on d <sub>2</sub> and St but also on the lengths L <sub>SP</sub> and L <sub>OP</sub> of the two plates. The dependence of U <sub>SP</sub> on L <sub>SP</sub> is exactly logarithmic, both with and without an OP. Next, we explore the deformation of the OP, which occurs by a combination of extension/compression and bending. The OP deformation is compression dominated close to the trench and bending dominated along the remaining portion of the OP that undergoes significant deformation. For a positively buoyant OP, backarc extension is also observed. Finally, we estimate the subduction interface viscosity η <sub>SI</sub> </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”XML:ID =“JGRB52658-ABS-ABS-ABS-ABS-0001”> <标题类型=“main”> Abstract </ title> >本工作使用边界元方法( BEM)探讨侧向电压板(OP)下侧孔型材板(底板板,SP)俯冲的动态。为简单起见,模型是二维,板纯度粘稠,环境流体无限深。板坯的负浮力是系统的唯一驱动力。首先,我们研究了专注于两个特征瞬时速度的SP运动学:下降板的收敛速度( v </ i> <sum> conv </ sub>)和水平板速度( u < / i> <sum的平面的<sum> sp </ sub>)。我们发现 v </ i> <sum> conv </ sub>完全由平板的几何体控制,通过润滑层的宽度 d </ i> <sub> 2 </ sub>将SP和OP分开,并通过SP的弯曲刚度St.转向 U </ i> <sub> sp </ sub>,发现该参数不仅取决于 d </ i > <sub> 2 </ sub>和st,但也在长度 l </ i> <sum> sp </ sum>和 l </ i> op </ sub>两块板块。 U </ i> <sup 上的依赖性 l </ i> <sub> sp </ sub>是恰好对数的,两者都有和没有op。接下来,我们探索OP的变形,其通过延长/压缩和弯曲的组合而发生。 OP变形是靠近沟槽的压缩,靠近沟槽和沿剩余部分的弯曲,沿着OP的剩余部分经历显着变形。对于一个积极的浮力OP,还观察到Backarc扩展。最后,我们估计俯冲界面粘度η</ i> si </ sub> </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6期</span><b style="margin: 0 2px;">|</b><span>共22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=Gerardi G.&option=202" target="_blank" rel="nofollow">Gerardi G.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ribe N. M.&option=202" target="_blank" rel="nofollow">Ribe N. M.;</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>Laboratoire FASTUniversity Paris‐Sud CNRS Université Paris‐Saclay F‐91405Orsay France;</p> <p>Laboratoire FASTUniversity Paris‐Sud CNRS Université Paris‐Saclay F‐91405Orsay France;</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=subduction interface&option=203" rel="nofollow">subduction interface;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=dynamics of lithosphere and mantle&option=203" rel="nofollow">dynamics of lithosphere and mantle;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=mechanics and modeling&option=203" rel="nofollow">mechanics and modeling;</a> </p> <div class="translation"> 机译:俯冲界面;岩石圈和地幔的动态;力学和建模; </div> </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 >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704025591827.html">Boundary Element Modeling of Two‐Plate Interaction at Subduction Zones: Scaling Laws and Application to the Aleutian Subduction Zone</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Gerardi G.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Gerardi G.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ribe N. 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