Crustal Thickness Variation in the Northern Appalachian Mountains: Implications for the Geometry of 3‐D Tectonic Boundaries Within the Crust

Li Cong; Gao Haiying; Williams Michael L.; Levin Vadim

摘要

Abstract > Teleseismic receiver functions were calculated to image the Moho geometry in the northern Appalachian Mountains in order to explore crustal thickness variations and possible linkages with tectonic units. Waveforms from 1995 to 2016 were analyzed for a total of ~ 200 broadband seismic stations, yielding a well‐distributed data set with high lateral resolution. Consistent P ‐to‐ S phases converted at the Moho can be clearly observed. The Moho depth increases from the coastal plain northwestward to the Appalachian Plateau, with a sharp east‐west gradient in southern New England. A distinct subrectangular downward deflection of the Moho is imaged in northern New Hampshire and western Maine. There is a spatial correlation observed between Moho depth variations and the NE‐SW trending Appalachian orogenic strike. Variations of crustal thickness along and across the orogenic strike provide insights into the formation and modification of the crust during and after the major Appalachian orogenic events. </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> > Telesmicic接收器功能被计算为图像北阿巴拉契亚山脉的Moho几何形象才能探索地壳厚度变化和具有构造单元的可能联系。从1995年到2016年的波形分析了总共〜200宽带地震站，产生了具有高横向分辨率的分布式数据集。可以清楚地观察到在MOHO处转换的一致性 P </ i> -TO- S相阶段。 Moho深度从西北地区的沿海平原到阿巴拉契亚高原增加，在新英格兰南部的尖锐的东西梯度。新罕布什尔州北部和缅因州北部的一个不同的分区的下落向下偏转。 Moho深度变化和Ne-SW趋势奥巴拉契术之间观察到空间相关性。地壳厚度的变化伴随着造口剧，提供了在主要阿巴拉契亚orenogens事件中和之后地壳的形成和修饰的见解。 </ 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-23539/'>《Geophysical Research Letters》</a> <b style="margin: 0 2px;">|</b><span>2018年第12期</span><b style="margin: 0 2px;">|</b><span>共10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=Li Cong&option=202" target="_blank" rel="nofollow">Li Cong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Gao Haiying&option=202" target="_blank" rel="nofollow">Gao Haiying;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Williams Michael L.&option=202" target="_blank" rel="nofollow">Williams Michael L.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Levin Vadim&option=202" target="_blank" rel="nofollow">Levin Vadim;</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>Department of GeosciencesUniversity of Massachusetts AmherstAmherst MA USA;</p> <p>Department of GeosciencesUniversity of Massachusetts AmherstAmherst MA USA;</p> <p>Department of GeosciencesUniversity of Massachusetts AmherstAmherst MA USA;</p> <p>Department of Earth and Planetary SciencesRutgers UniversityNew Brunswick NJ 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;"> </p> </li> </ul> </div> </div> <div class="literature cardcommon" id="literaturereference" style="display:none"> <div class="similarity "> <h3 class="all_title" id="enpatent111">引文网络</h3> <div class="referencetab clearfix"> <ul id="referencedaohang"> <li dataid="referenceul">参考文献</li> <li dataid="citationul">引证文献</li> <li dataid="commonreferenceul">共引文献</li> <li dataid="commoncitationul">同被引文献</li> <li dataid="tworeferenceul">二级参考文献</li> <li dataid="twocitationul">二级引证文献</li> </ul> </div> <div class="reference_details" id="referenceList"> <ul id="referenceul"></ul> <ul id="citationul"></ul> <ul id="commonreferenceul"></ul> <ul id="commoncitationul"></ul> <ul id="tworeferenceul"></ul> <ul id="twocitationul"></ul> </div> </div> </div> <div class="literature 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