Evidence for an impact‐induced magnetic fabric in Allende, and exogenous alternatives to the core dynamo theory for Allende magnetization

Muxworthy Adrian R.; Bland Phillip A.; Davison Thomas M.; Moore James; Collins Gareth S.; Ciesla Fred J.

摘要

Abstract > We conducted a paleomagnetic study of the matrix of Allende <fc>CV</fc> 3 chondritic meteorite, isolating the matrix's primary remanent magnetization, measuring its magnetic fabric and estimating the ancient magnetic field intensity. A strong planar magnetic fabric was identified; the remanent magnetization of the matrix was aligned within this plane, suggesting a mechanism relating the magnetic fabric and remanence. The intensity of the matrix's remanent magnetization was found to be consistent and low (~6?μT). The primary magnetic mineral was found to be pyrrhotite. Given the thermal history of Allende, we conclude that the remanent magnetization was formed during or after an impact event. Recent mesoscale impact modeling, where chondrules and matrix are resolved, has shown that low‐velocity collisions can generate significant matrix temperatures, as pore‐space compaction attenuates shock energy and dramatically increases the amount of heating. Nonporous chondrules are unaffected, and act as heat‐sinks, so matrix temperature excursions are brief. We extend this work to model Allende, and show that a 1?km/s planar impact generates bulk porosity, matrix porosity, and fabric in our target that match the observed values. Bimodal mixtures of a highly porous matrix and nominally zero‐porosity chondrules make chondrites uniquely capable of recording transient or unstable fields. Targets that have uniform porosity, e.g., terrestrial impact craters, will not record transient or unstable fields. Rather than a core dynamo, it is therefore possible that the origin of the magnetic field in Allende was the impact itself, or a nebula field recorded during transient impact heating. </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 =“maps12918-abs-0001”> <标题类型=“main”>抽象</ title> > 我们对Allende矩阵进行了古磁性研究 <FC> CV </ FC> 3个骨灰陨石，隔离矩阵的初级倒置磁化，测量其磁性织物并估算古磁场强度。鉴定了强大的平面磁性织物;在该平面内，基质的剩余磁化化对齐，建议磁性织物和剩磁的机制。发现基质的剩磁磁化强度是一致的，低（〜6？μT）。发现初级磁性矿物是Pyrrhotite。鉴于Allende的热历史，我们得出结论，在冲击事件期间或之后形成了结垢磁化。最近的Messcale影响模型，其中核心和矩阵被解决，已经表明，低速冲突可以产生显着的矩阵温度，因为孔隙空间压实衰减震动能量并显着增加加热量。无孔骨折不受影响，并充当散热器，因此矩阵温度偏移是简短的。我们将这项工作扩展到模型allende，并显示1 km / s的平面冲击在我们的目标中产生堆积孔隙度，矩阵孔隙度和织物，其匹配观察到的值。高孔基质的双峰混合物和名义上零孔隙率软骨抑制使软骨都能够独特地记录瞬态或不稳定的田地。具有均匀孔隙度的目标，例如陆地冲击陨石坑，不会记录瞬态或不稳定的领域。而不是核心发电机，因此Allende中磁场的起源是可能的，或者在瞬态冲击加热期间记录的星云场。 </ 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-24922/'>《Meteoritics & planetary science》</a> <b style="margin: 0 2px;">|</b><span>2017年第10期</span><b style="margin: 0 2px;">|</b><span>共15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=Muxworthy Adrian R.&option=202" target="_blank" rel="nofollow">Muxworthy Adrian R.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bland Phillip A.&option=202" target="_blank" rel="nofollow">Bland Phillip A.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Davison Thomas M.&option=202" target="_blank" rel="nofollow">Davison Thomas M.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Moore James&option=202" target="_blank" rel="nofollow">Moore James;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Collins Gareth S.&option=202" target="_blank" rel="nofollow">Collins Gareth S.;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Ciesla Fred J.&option=202" target="_blank" rel="nofollow">Ciesla Fred J.;</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 Earth Science and EngineeringImperial College LondonLondon SW7 2AZ UK;</p> <p>Department of Applied GeologyCurtin University of TechnologyGPO Box?U1987 Perth Western Australia 6845 Australia;</p> <p>Department of Earth Science and EngineeringImperial College LondonLondon SW7 2AZ UK;</p> <p>Department of Earth Science and EngineeringImperial College LondonLondon SW7 2AZ UK;</p> <p>Department of Earth Science and EngineeringImperial College LondonLondon SW7 2AZ UK;</p> <p>Department of Geophysical ScienceUniversity of Chicago5734 South Ellis Ave. Chicago Illinois 60430 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/161.html" title="天文学">天文学;</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 >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/0704023664985.html">Evidence for an impact‐induced magnetic fabric in Allende, and exogenous alternatives to the core dynamo theory for Allende magnetization</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Muxworthy Adrian R.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Muxworthy Adrian R.,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Bland 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href="/academic-conference-cn_meeting-16922_thesis/020221730752.html">准一维纳米线阵列的磁化反磁化——Cu掺杂ZnO纳米线阵列的室温铁磁性研究</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=王闻熹&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 王闻熹</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=朱静怡&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,朱静怡</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=张照晖&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,张照晖</a> <span> <a href="/conference-cn-16922/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第二届全国大学生创新论坛 </a> <span> <span> . 2009</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020311324367.html">γ-Fe2O2/CoFe2O4复合磁性纳米微粒及其磁性液体的合成与磁化性质研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李军明&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 李军明</a> <span> . 2015</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/061206513.html">检测铁磁性、亚铁磁性、顺磁性或抗磁性材料磁化响应的方法和设备</a> <b>[P]</b> . <span> 中国专利： CN1015072B </span> <span> . 1991.12.11</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/061204204141.html">磁性编码器的磁化装置和磁化方法</a> <b>[P]</b> . <span> 中国专利： CN109716458B </span> <span> . 2021.01.15</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130434123982.html">Magnetizable or magnetic material e.g. nano-particle, heating device for use in tumor therapy, has two air-cored coils inducing heating of material by magnetic loss in flow-through condition, and accommodation device for body part</a> <b>[P]</b> . <span> 外国专利：  DE102005062746A1 </span> <span> . 2007-07-05</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：可磁化或磁性材料，例如纳米粒子，用于肿瘤治疗的加热装置，具有两个空心线圈，通过流通条件下的磁损耗诱导材料加热，以及用于身体部位的容纳装置 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130461341820.html">EM oscillation inducer with U=shaped core for windings - has measurement value pick=up for high efficiency but preventing armature in air gap impacting shanks of magnetic core</a> <b>[P]</b> . <span> 外国专利：  DE4210287C1 </span> <span> . 1993-02-11</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：带有U =形铁芯用于绕组的EM激振器-具有高效率的测量值== up up </span> </p> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/patent-detail/06130450034217.html">Wheel rim dynamo for production of current for bicycles, bicycle trailers or motorcycles uses magnetized rim and coil with iron core consisting of flat magnetic strip</a> <b>[P]</b> . <span> 外国专利：  DE19943088A1 </span> <span> . 2000-05-11</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：轮辋发电机，用于生产自行车，自行车拖车或摩托车的电流，使用磁化轮辋和带铁芯的线圈（由扁平磁条组成） </span> </p> </li> </ul> </div> </div> </div> <div class="theme cardcommon" style="overflow: auto;display:none"> <h3 class="all_title" id="enpatent55">相关主题</h3> <ul id="subject"> </ul> </div> </div> </div> </div> <div class="right rightcon"> <div class="details_img cardcommon clearfix" style="margin-bottom: 10px;display:none;" > </div> </div> </div> <div id="thesis_get_original1" class="downloadBth" style="bottom: 19px;z-index: 999;" onclick="ywcd('0704023664985','4',7,2,1,'',this,24)" class="delivery" prompt="010401" title="通过人工服务将文献原文发送至邮箱" 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