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Tectonic erosion related to continental subduction: An example from the eastern North Qaidam Mountains, NWNW China

机译：与大陆郊区有关的构造侵蚀：来自东北QAIDAM山脉的一个例子， nw nw中国

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Abstract > Tectonic erosion has been commonly recognized in oceanic subduction zones, but evidence of tectonic erosion related to continental subduction is rarely reported. In this contribution, we suggest a tectonic erosion process along the North Qaidam Mountains of <fc>NW</fc> China during the Early Palaeozoic continental subduction. To the north of the North Qaidam ultra‐high pressure ( <fc>UHP</fc> ) metamorphic belt, the microcontinental Oulongbuluke Block (OB) is characterized by Precambrian metamorphic basement. New and existing zircon U–Pb data show that the OB underwent Early Palaeoproterozoic (2.4–2.3?Ga) magmatism and Late Palaeoproterozoic ( c . 1.9?Ga) high‐grade metamorphic and anatectic events. The North Qaidam <fc>UHP</fc> metamorphic belt has been considered to result from the northward subduction of the Qaidam continental block consisting mainly of Meso‐Neoproterozoic orthogneiss and paragneiss. However, our new data show some gneisses enclosing eclogites in the eastern North Qaidam <fc>UHP</fc> metamorphic belt (Dulan <fc>UHP</fc> metamorphic unit) experienced 2.4–2.3?Ga magmatism and 1.9–1.8?Ga metamorphism, similar to those of the OB, prior to Early Palaeozoic <fc>UHP</fc> metamorphism. These data suggest that tectonic erosion occurred during north‐dipping subduction: the Precambrian basement from the upper plate (OB) was transported in the subduction zone to more than 80?km depth, resulting in <fc>UHP</fc> metamorphism related to Early Palaeozoic continental subduction prior to their exhumation. </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 =“jmg12305-abs-0001”xml：lang =“en”> <title type =“main” >摘要</标题> >构造侵蚀在海洋俯冲区中普遍识别，但很少报道与大陆俯冲相关的构造侵蚀的证据。在这一贡献中，我们建议在古生代大陆郊区的<FC> NW </ FC>中国北柴达姆山脉的构造侵蚀过程。在北柴达木超高压（<FC> UHP </ FC>）变质带，微环ooulongBuluke块（OB）的特点是Prembrian Metalymorphic地下室。新的和现有的锆石U-PB数据显示，OB接受了古古典古代（2.4-2.3？GA）岩浆学和晚古典古典（ C </ i>。1.9？GA）高档变质和阴化事件。北QAIDAM <FC> UHP </ FC>变质带已被认为是由柴达木大陆块的向北俯冲产生，主要由Meso-Neoproterozoic古代耳鼻喉和伞菌组成。然而，我们的新数据显示了一些封闭Eclogites在东北QAIDAM <FC> UHP </ FC>变质带（Dulan <FC> UHP </ FC>变质单位）的整个味道经历了2.4-2.3？GA Magmatism和1.9-1.8？ GA变质形态，类似于OB，早期猴古生代的<FC> UHP </ FC>变质。这些数据表明，北浸砖期间发生了构造侵蚀：从上板（OB）的预先印记地下室在俯冲区中运输到80多个受影响的深度，导致<FC> UHP </ FC>变质相关在他们挖掘之前的早期古生代大陆郊区。 </ 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-35076/'>《Journal of Metamorphic Geology》</a> <b style="margin: 0 2px;">|</b><span>2018年第5期</span><b style="margin: 0 2px;">|</b><span>共14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=Lu Zenglong&option=202" target="_blank" rel="nofollow">Lu Zenglong;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhang Jianxin&option=202" target="_blank" rel="nofollow">Zhang Jianxin;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Mattinson Chris&option=202" target="_blank" rel="nofollow">Mattinson Chris;</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>Institute of GeologyChinese Academy of Geological SciencesBeijing China;</p> <p>Institute of GeologyChinese Academy of Geological SciencesBeijing China;</p> <p>Department of Geological SciencesCentral Washington UniversityEllensburg WA 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/165.html" title="地质学">地质学;</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=continental subduction&option=203" rel="nofollow">continental subduction;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Early Palaeoproterozoic magmatism&option=203" rel="nofollow">Early Palaeoproterozoic magmatism;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Late Palaeoproterozoic metamorphism&option=203" rel="nofollow">Late Palaeoproterozoic metamorphism;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=North Qaidam Mountains&option=203" rel="nofollow">North Qaidam Mountains;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Tectonic erosion&option=203" rel="nofollow">Tectonic erosion;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=UHP metamorphism&option=203" rel="nofollow">UHP metamorphism;</a> </p> <div class="translation"> 机译：大陆郊区;古古典古代山巨星;已故古古代古代变质;北柴达姆山脉;构造侵蚀;UHP变质; 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