| 一块新发现的月球陨石NWA 12279的岩石矿物学、源区和冲击变质作用 |
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| 引用本文： | 周剑凯,陈宏毅,谢兰芳,缪秉魁,仲艳.一块新发现的月球陨石NWA 12279的岩石矿物学、源区和冲击变质作用[J].岩石矿物学杂志,2019,38(4):521-534. |
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| 作者姓名： | 周剑凯 陈宏毅 谢兰芳 缪秉魁 仲艳 |
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| 作者单位： | 桂林理工大学广西隐伏金属矿产勘查重点实验室;行星地质演化广西高校重点实验室;桂林理工大学陨石与行星物质研究中心 |
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| 基金项目： | 国家自然科学基金项目（41866008）；广西科技计划项目（桂科AD16450001）；广西隐伏金属矿产勘查重点实验室主任基金项目（13-A-01-02） |
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| 摘 要： | NWA 12279为2016年发现的一块斜长岩质月球陨石,由86%的斜长岩和14%的冲击熔融角砾岩组成。斜长岩具嵌晶结构,矿物组成主要为斜长石(70. 6%)、橄榄石(11. 3%)、辉石(10. 0%)、镁铝尖晶石(7. 0%),含少量石英、铬铁矿和钛铁矿;冲击熔融角砾岩具角砾状结构,主要由岩屑(斜长岩、辉长-橄长-斜长岩、微斑熔融角砾岩、辉长岩)、晶屑(橄榄石、辉石、斜长石、尖晶石)、玻屑和基质组成。斜长岩和角砾岩的矿物组成基本一致,主要为斜长石(An_(92. 9～98. 4))、紫苏辉石(Fs_(15. 5～32. 2)Wo_(2. 98～4. 22))、易变辉石(Fs_(27. 9～53. 1)Wo_(7. 19～14. 7))、普通辉石(Fs_(8. 42～38. 9)Wo_(17. 0～44. 1))、橄榄石(Fo_(53. 7～89. 4))、尖晶石(Mg_(4. 97)Fe_(0. 86))_(5. 83)(Al_(11. 4)Cr_(0. 61))_(12. 0)O_(24)]。通过对陨石的矿物组成、碎屑组成、矿物成分、全岩成分和冲击变质特征进行研究,并和已发现的月球斜长岩进行了对比,认为该陨石可能起源于一个新的富含尖晶石的辉长橄长斜长岩高地。该陨石的斜长岩和角砾岩具有不同的冲击特征,斜长岩区域发育橄榄石面状破裂、斜长石熔长石化及含未熔融的辉石和橄榄石晶屑的冲击熔脉;角砾岩区域发育玻璃质熔脉、冲击熔体及岩石角砾化,这些特征限制了斜长岩区和角砾岩区经历的冲击压力峰值分别约为45 GPa和78 GPa,温度峰值分别约为1 100℃和1890℃,冲击变质阶段为S_5～S_6。
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| 关 键 词： | 月球陨石 NWA 12279 岩石矿物学 源区 冲击变质 |
| 收稿时间： | 2019/3/7 0:00:00 |
Petromineralogy, origin and impact metamorphism of a new lunar meteorite NWA 12279 |
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| ZHOU Jian-kai,CHEN Hong-yi,XIE Lan-fang,MIAO Bing-kui and ZHONG Yan.Petromineralogy, origin and impact metamorphism of a new lunar meteorite NWA 12279[J].Acta Petrologica Et Mineralogica,2019,38(4):521-534. |
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| Authors: | ZHOU Jian-kai CHEN Hong-yi XIE Lan-fang MIAO Bing-kui and ZHONG Yan |
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| Institution: | Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541006, China;Guangxi Key University Laboratory of Planetary Geological Evolution, Guilin University of Technology, Guilin 541006, China;Institute of Meteorites and Planetary Materials Research, Guilin University of Technology, Guilin 541006, China,Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541006, China;Guangxi Key University Laboratory of Planetary Geological Evolution, Guilin University of Technology, Guilin 541006, China;Institute of Meteorites and Planetary Materials Research, Guilin University of Technology, Guilin 541006, China,Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541006, China;Guangxi Key University Laboratory of Planetary Geological Evolution, Guilin University of Technology, Guilin 541006, China;Institute of Meteorites and Planetary Materials Research, Guilin University of Technology, Guilin 541006, China,Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541006, China;Guangxi Key University Laboratory of Planetary Geological Evolution, Guilin University of Technology, Guilin 541006, China;Institute of Meteorites and Planetary Materials Research, Guilin University of Technology, Guilin 541006, China and Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541006, China;Guangxi Key University Laboratory of Planetary Geological Evolution, Guilin University of Technology, Guilin 541006, China;Institute of Meteorites and Planetary Materials Research, Guilin University of Technology, Guilin 541006, China |
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| Abstract: | |
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| Keywords: | lunar meteorite NWA 12279 petromineralogy origin impact metamorphism |
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