| 云南西双版纳(曼桂)目击陨石的热变质和冲击变质研究 |
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| 引用本文： | 罗业鑫,陈景有,梁伯健,廖世勇,李晔,李少林,吴蕴华,王英,邓志培,梅苞,徐伟彪.云南西双版纳(曼桂)目击陨石的热变质和冲击变质研究[J].天文学报,2019,60(5):1-14. |
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| 作者姓名： | 罗业鑫 陈景有 梁伯健 廖世勇 李晔 李少林 吴蕴华 王英 邓志培 梅苞 徐伟彪 |
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| 作者单位： | 澳门科技大学月球与行星科学国家重点实验室;中国科学院比较行星学卓越创新中心中国科学院紫金山天文台 |
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| 基金项目： | 国家自然科学基金项目(41573059、41573060、41773059), 澳门科学发展基金项目 |
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| 摘 要： | 曼桂陨石是新近(2018年6月1日)陨落在云南西双版纳地区的目击球粒陨石,其中的主要矿物为橄榄石(Fa_(24.3±0.6))、斜方辉石(Fs_(20.6±0.5)Wo_(0.4±0.2))、长石(An_(11-12)Or_(2-4))、铁镍金属和陨硫铁,次要矿物为铬铁矿、白磷钙矿等.橄榄石和辉石的化学成分表明曼桂陨石属于L型普通球粒陨石.陨石中球粒很少且轮廓不清晰,基质矿物普遍经历过重结晶,重结晶矿物颗粒粒径较大,高钙辉石粒径25–30μm,长石颗粒大多超过50μm,说明该陨石属于6型岩石类型.橄榄石和辉石颗粒中发育有波状消光、嵌晶块状消光现象、平面裂隙和面状变形构造,长石熔长石化并不完全,陨石中观察到宽度不等且纵横交错的冲击熔融脉,表明曼桂普通球粒陨石受到的冲击变质作用可以达到S5级以上.通过熔融脉中的矿物组合推断出熔融脉中矿物经历的压力在15–16 GPa左右.
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| 关 键 词： | 天体化学 陨石 方法: 实验室 |
| 收稿时间： | 2018/12/18 0:00:00 |
| 修稿时间： | 2019/7/5 0:00:00 |
Thermal and Shock Metamorphism Study on the Xishuangbanna (Mangui) Ordinary Chondrite |
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| LUO Ye-xin,CHEN Jing-you,LIANG Bo-jian,LIAO Shi-yong,LI Ye,LI Shao-lin,WU Yun-hu,WANG Ying,TANG Chi-pui,MEI Bao and HSU Wei-biao.Thermal and Shock Metamorphism Study on the Xishuangbanna (Mangui) Ordinary Chondrite[J].Acta Astronomica Sinica,2019,60(5):1-14. |
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| Authors: | LUO Ye-xin CHEN Jing-you LIANG Bo-jian LIAO Shi-yong LI Ye LI Shao-lin WU Yun-hu WANG Ying TANG Chi-pui MEI Bao and HSU Wei-biao |
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| Institution: | State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau 999078,State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau 999078,State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau 999078,Center for Excellence in Comparative Planetology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033,Center for Excellence in Comparative Planetology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033,Center for Excellence in Comparative Planetology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033,Center for Excellence in Comparative Planetology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033,Center for Excellence in Comparative Planetology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033,State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau 999078,State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau 999078 and Center for Excellence in Comparative Planetology, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210033 |
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| Abstract: | Mangui is a recent witnessed fall in Yunnan, China. This meteorite has experienced high level of thermal and shock metamorphism. The major minerals are olivine (Fa$_{24.3\pm0.6 |
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| Keywords: | astrochemistry meteorites methods: laboratory |
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