Imaging of Lithospheric Structure Beneath Jeju Volcanic Island by Teleseismic Traveltime Tomography

Song Jung‐Hun; Kim Seongryong; Rhie Junkee; Lee Sang‐Hyun; Kim YoungHee; Kang Tae‐Seob

摘要

Abstract > Jeju Island (JI) is an intraplate volcanic field located at the continental margin of Northeast Asia. This volcanic island has been formed by multiple eruptions from the Pleistocene to the Holocene (~3.7?ka), which have yielded hundreds of monogenetic volcanic cones and a central basaltic shield. To understand the volcanic structures and mechanism beneath JI, we deployed 20 broadband temporary seismometers across the island for over two years (October 2013 to November 2015). We investigated the crustal and upper mantle structures in JI for the first time using the gathered data. Through teleseismic traveltime tomography, we obtained images of the lithospheric structure related to the volcanic system. A major finding was the identification of a prominent low‐velocity anomaly (<?0.3?km/s in P wave velocity relative to the surrounding high‐velocity region) beneath the summit of the central shield volcano at greater depths (50–60?km), which separates into low‐velocity zones at shallower depths (10–45?km). Based on previous geological observations, the anomalies were interpreted as a magmatic system, potentially with partial melting. Moreover, relatively high velocity zones were consistently imaged to the north, east, and west of the island, indicating relatively thick lithospheric structures at the southern margin of the continental lithosphere beneath the Korean Peninsula. Based on the geometries of the imaged structures, we suggest that a focused decompressional melting at sublithospheric depths and complex magma interactions within the lithosphere resulted in the characteristics of JI volcanism as intraplate magmatic activities that are isolated in space and confined in time. </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> > jeju island（ji）是位于东北亚洲大陆边缘的境内火山岩。这座火山岛是通过从更新世的多次爆发到全茂（〜3.7 ka）的爆发形成，其产生了数百个单一的火山锥和中央玄武岩屏蔽。为了了解JI下面的火山结构和机制，我们在岛上部署了20多年（2013年10月至2015年11月）。我们首次使用收集的数据调查了Ji中的地壳和上部地幔结构。通过Telesmic Travel Theer Incraptography，我们获得了与火山系统相关的岩石结构结构的图像。主要发现是在中央盾牌火山峰会下，鉴定了突出的低速异常（相对于周围高速区域的 P </ i>波速）更深入的深度（50-60 km），分离成浅深度的低速区（10-45 km）。基于先前的地质观察，异常被解释为岩浆系统，可能具有部分熔化。此外，相对高的速度区始终成像到岛的北部，东部和西部，表明朝鲜半岛大陆岩石圈南部边缘的岩石间结构相对厚的岩石结构。基于成像结构的几何形状，我们建议在思孔深度和岩石之间的复杂岩浆相互作用的聚焦解压缩熔化导致了JI火山的特征，作为血管内的岩土岩石活动，这些活动在空间中分离并限制在时间内。 </ p> </ abstract> </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8期</span><b style="margin: 0 2px;">|</b><span>共18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=Song Jung‐Hun&option=202" target="_blank" rel="nofollow">Song Jung‐Hun;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kim Seongryong&option=202" target="_blank" rel="nofollow">Kim Seongryong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Rhie Junkee&option=202" target="_blank" rel="nofollow">Rhie Junkee;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lee Sang‐Hyun&option=202" target="_blank" rel="nofollow">Lee Sang‐Hyun;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kim YoungHee&option=202" target="_blank" rel="nofollow">Kim YoungHee;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kang Tae‐Seob&option=202" target="_blank" rel="nofollow">Kang Tae‐Seob;</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>School of Earth and Environmental SciencesSeoul National UniversitySeoul South Korea;</p> <p>School of Earth and Environmental SciencesSeoul National UniversitySeoul South Korea;</p> <p>School of Earth and Environmental SciencesSeoul National UniversitySeoul South Korea;</p> <p>School of Earth and Environmental SciencesSeoul National UniversitySeoul South Korea;</p> <p>School of Earth and Environmental SciencesSeoul National UniversitySeoul South Korea;</p> <p>Department of Earth and Environmental SciencesPukyong National UniversityBusan South Korea;</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=Jeju Island&option=203" rel="nofollow">Jeju Island;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=intraplate volcano&option=203" rel="nofollow">intraplate volcano;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=teleseismic traveltime tomography&option=203" rel="nofollow">teleseismic traveltime tomography;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=lithospheric structure&option=203" rel="nofollow">lithospheric structure;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=dispersed magmatic structure&option=203" rel="nofollow">dispersed magmatic structure;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=decompressional melting&option=203" rel="nofollow">decompressional melting;</a> </p> <div class="translation"> 机译：济州岛;陷阱火山;Telismic的旅行时间断层扫描;岩性结构;分散的岩浆结构;减压熔化; </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 >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/0704025591722.html">Imaging of Lithospheric Structure Beneath Jeju Volcanic Island by Teleseismic Traveltime Tomography</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Song Jung‐Hun&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Song Jung‐Hun,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Kim Seongryong&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Kim Seongryong,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Rhie Junkee&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Rhie Junkee,</a> <a href="/journal-foreign-34677/" target="_blank" rel="nofollow" class="tuijian_authcolor">Journal of geophysical research. 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