Non‐uniform splitting of a single mantle plume by double cratonic roots: Insight into the origin of the central and southern East African Rift System

Koptev Alexander; Cloetingh Sierd; Gerya Taras; Calais Eric; Leroy Sylvie

摘要

Abstract >Using numerical thermo‐mechanical experiments we analyse the role of an active mantle plume and pre‐existing lithospheric thickness differences in the structural development of the central and southern East African Rift system. The plume‐lithosphere interaction model setup captures the essential features of the studied area: two cratonic bodies embedded into surrounding lithosphere of normal thickness. The results of the numerical experiments suggest that localization of rift branches in the crust is mainly defined by the initial position of the mantle plume relative to the cratons. We demonstrate that development of the Eastern branch, the Western branch and the Malawi rift can be the result of non‐uniform splitting of the Kenyan plume, which has been rising underneath the southern part of the Tanzanian craton. Major features associated with Cenozoic rifting can thus be reproduced in a relatively simple model of the interaction between a single mantle plume and pre‐stressed continental lithosphere with double cratonic roots. </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 XMLNS =“http://www.wiley.com/namespaces/wiley”type =“main”xml：id =“ter12317-abs-0001”xml：lang =“en”> <标题类型=“main” >摘要</标题> >使用数值热机械实验，我们分析了中南部和南方东非裂口系统结构发展中的活跃披风羽毛和预先存在的岩石层厚度差异的作用。 Plume-Lithosphose互动模型设置捕获了研究区域的基本特征：嵌入到围绕正常厚度的周围岩石圈的两个粘仓体。数值实验的结果表明，地壳中的裂缝分支的定位主要由地幔羽流相对于粪群岛的初始位置定义。我们展示了东部分支机构，西部分支机构和马拉维裂谷的发展可以是肯尼亚羽流的不均匀分裂的结果，这在坦桑尼亚·克拉顿南部的南部下面升起。因此，可以在单个披风羽流和预应力的大陆岩石之间的相互作用模型中复制与新生代脱档相关的主要特征，双裂隙根部裂缝根。</ 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-30393/'>《Terra Nova》</a> <b style="margin: 0 2px;">|</b><span>2018年第2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=Koptev Alexander&option=202" target="_blank" rel="nofollow">Koptev Alexander;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Cloetingh Sierd&option=202" target="_blank" rel="nofollow">Cloetingh Sierd;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Gerya Taras&option=202" target="_blank" rel="nofollow">Gerya Taras;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Calais Eric&option=202" target="_blank" rel="nofollow">Calais Eric;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Leroy Sylvie&option=202" target="_blank" rel="nofollow">Leroy Sylvie;</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>Sorbonne UniversitésParis France;</p> <p>Department of Earth SciencesUtrecht UniversityUtrecht The Netherlands;</p> <p>ETH‐ZurichInstitute of GeophysicsZurich Switzerland;</p> <p>Ecole Normale SupérieurePSL Research UniversityParis France;</p> <p>Sorbonne UniversitésParis 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/14.html" title="天文学、地球科学">天文学、地球科学;</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"> <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/0704024722655.html">Non‐uniform splitting of a single mantle plume by double cratonic roots: Insight into the origin of the central and southern East African Rift System</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Koptev Alexander&option=202" 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