MgAl        <sub >2</sub>2        O        <sub >4</sub>4        spinels from Allende and        <fc >NWA</fc>NWA        763 carbonaceous chondrites: Structural refinement, cooling history, and trace element contents

Lenaz Davide; Lughi Vanni; Perugini Diego; Petrelli Maurizio; Turco Gianluca; Schmitz Birger

摘要

Abstract > MgAl <sub>2</sub> O <sub>4</sub> spinels from Allende and <fc>NWA</fc> 763 carbonaceous chondrites were studied by X‐ray single crystal diffraction, <fc>SEM</fc> , electron microprobe, <fc>LA</fc> ‐ <fc>ICP</fc> ‐ <fc>MS</fc> , and Raman spectroscopy. Those from Allende are almost pure, but, in one case, we found a strong FeO <sub>tot</sub> zonation. Spinels from <fc>NWA</fc> 763 show Mg‐Fe 2+ substitutions. Almost pure MgAl <sub>2</sub> O <sub>4</sub> spinels from both meteorites underwent slow cooling and reached their intracrystalline closure temperature ( T <sub>c</sub> ) in the range 460–520?°C. The <fc>NWA</fc> 763 spinel with higher FeO content shows a T <sub>c</sub> of about 720?°C. X‐ray single crystal diffraction and Raman spectroscopy suggest a slow cooling and an ordered structure with trivalent cations in M site and divalent in T site. Among the trace elements, Ti and Co are enriched with respect to the terrestrial analogs, while Mn, Ni, and Sn show intermediate values between different terrestrial occurrences. Vanadium cannot be used as a tracer of extraterrestrial origin as for Cr‐spinels, because its content is similar in extraterrestrial and terrestrial spinels. In the zoned crystal from Allende, Co show a strong zonation similar to that of FeO. </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：ID =“Maps13400-ABS-0001”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 米格尔 <sub> 2 </ sub> O. <sub> 4 </ sub> 来自allende的尖晶石和 <FC> NWA </ FC> 通过X射线单晶衍射研究了763个碳质软化物， <FC> SEM </ FC> ，电子微探针， <FC> LA </ FC> - <FC> ICP </ FC> - <FC> MS </ FC> 和拉曼光谱。来自allende的人几乎是纯粹的，但在一个情况下，我们发现了一个强大的feo <sub> tot </ sub> 区分。尖晶石来自 <FC> NWA </ FC> 763显示MG-FE 2 + </ sup> 替换。几乎纯粹的mgal. <sub> 2 </ sub> O. <sub> 4 </ sub> 来自陨石的尖晶石接受缓慢缓慢缓慢，并达到了它们的肠内闭合温度（ t </ i> <sub> c </ sub> ）在460-520°C范围内。这 <FC> NWA </ FC> 具有较高Feo含量的763个尖晶石显示了一个 t </ i> <sub> c </ sub> 约720？°C。 X射线单晶衍射和拉曼光谱表明缓慢冷却和具有在M位点的三价阳离子的有序结构，并在T位点数。在微量元素中，Ti和Co被富集到陆地类似物，而Mn，Ni和Sn在不同的陆地出现之间显示中间值。钒不能用作作为Cr-尖晶石的外星来源的示踪剂，因为其含量在外星和陆尖晶石中类似。在来自allende的分区水晶中，CO表现出类似于Feo的强烈区分。 </ 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>2019年第12期</span><b style="margin: 0 2px;">|</b><span>共12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=Lenaz Davide&option=202" target="_blank" rel="nofollow">Lenaz Davide;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Lughi Vanni&option=202" target="_blank" rel="nofollow">Lughi Vanni;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Perugini Diego&option=202" target="_blank" rel="nofollow">Perugini Diego;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Petrelli Maurizio&option=202" target="_blank" rel="nofollow">Petrelli Maurizio;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Turco Gianluca&option=202" target="_blank" rel="nofollow">Turco Gianluca;</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Schmitz Birger&option=202" target="_blank" rel="nofollow">Schmitz Birger;</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 Mathematics and GeosciencesUniversity of Trieste34128 Trieste Italy;</p> <p>Department of Engineering and ArchitectureUniversity of Trieste34127 Trieste Italy;</p> <p>Department of Physics and GeologyUniversity of Perugia06123 Perugia Italy;</p> <p>Department of Physics and GeologyUniversity of Perugia06123 Perugia Italy;</p> <p>Department of Medical SciencesUniversity of TriestePiazza dell'Ospitale 1 34125 Trieste Italy;</p> <p>Astrogeobiology LaboratoryLund University22100 Lund Sweden;</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 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MgAl 22 O 44 spinels from Allende and NWANWA 763 carbonaceous chondrites: Structural refinement, cooling history, and trace element contents

摘要

MgAl ₂2 O ₄4 spinels from Allende and NWANWA 763 carbonaceous chondrites: Structural refinement, cooling history, and trace element contents