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Impact history and origin of lunar meteorite Northwest Africa 15528

Science China Earth Sciences 2023年第6期66卷 1399-1422页

作者： Runchuan LIU Huaiyu HE Thomas SMITH Hanqing YE Huapei WANG Xuhang ZHANG Fei SU Ziheng LIU Wei GUO Peng YANG Chuantong ZHANG dingshuai xue Ting CAO Jiannan LI xuelong JIANG Ye HE Chao LU State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutes of Earth Science Chinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Paleomagnetism and Planetary Magnetism Laboratory School of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069China Institution of Meteorites and Planetary Materials Research Center Guilin University of TechnologyGuilin 541004China

No samples from the Moon’s far side have been returned to Earth.Thus,lunar meteorite study can deepen the understanding of the Moon’s far side(if we can identify which lunar meteorites came from the Moon’s far side).The Northwest Africa(NWA)15528 meteorite is a lunar feldspathic regolith breccia meteorite and we speculated it might originate from the Feldspathic Highlands Terrane(FHT)on the far side of the Moon.Here,we report detailed petrography,major and trace elements,and noble gas(He,Ne,and Ar)isotopes for the clasts and matrix,respectively.The results show that the NWA 15528 lunar meteorite contains diverse clasts,including anorthosite,granulite,basalt,and impact melt clasts.The coarse,wellcrystallized,uniform chemical composition minerals may come from intrusive plutonic rocks.Among the anorthosite clasts,the norite/olivine clasts originate from the deep lunar crust,whereas the other anorthosite clasts are from lunar highlands.The Sm concentrations in NWA 15528 were similar to those in the fourth group of Apollo 16 melt samples,demonstrating that NWA 15528 has a typical plagioclase highland meteorite composition.Compared with the Apollo sample data and remote sensing results,the chemical composition of NWA 15528 indicated strong affinities with the FHT area and ferroan anorthosite(FAN)material from the far side of the Moon.The noble gas isotopic composition of NWA 15528 is consistent with a binary mixture of solar wind and cosmogenic components;during stepwise pyrolytic extractions,we observed that the abundance of cosmogenic components decreased,whereas that of solar wind components increased with increasing temperature.The average cosmic-ray exposure(CRE)age of the matrix and granulite is 42±6 Ma,with a shielding depth in the same range of 10-20 g cm^(−2).The gas retention age of NWA 15528 is 2.14 Ga,and the antiquity age of NWA 15528 is(0.69-0.74)±0.2 Ga(considering 50%40Arm is 40Artrap)which indicates the different clasts of NWA 15528 are assembled after 0.69-0.74 Ga.

关键词： The Moon Regolith Meteorites Cosmic rays Solar wind Thermal histories Far side of the Moon

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Characteristics of the lunar samples returned by the Chang'E-5 mission

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National Science Review 2022年第2期9卷 21-33页

作者： Chunlai Li Hao Hu Meng-Fei Yang Zhao-Yu Pei Qin Zhou Xin Ren Bin Liu Dawei Liu Xingguo Zeng Guangliang Zhang Hongbo Zhang Jianjun Liu Qiong Wang Xiangjin Deng Caijin Xiao Yonggang Yao dingshuai xue Wei Zuo Yan Su Weibin Wen Ziyuan Ouyang Key Laboratory of Lunar and Deep Space Exploration National Astronomical Observatories Chinese Academy of Sciences Lunar Exploration and Space Engineering Center Beijing Institute of Spacecraft System Engineering Department of Nuclear Physics China Institute of Atomic Energy State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Institute of Geochemistry Chinese Academy of Sciences

Forty-five years after the Apollo and Luna missions returned lunar samples,China’s Chang’E-5(CE-5)mission collected new samples from the mid-latitude region in the northeastern Oceanus Procellarum of the Moon.Our study shows that 95% of CE-5 lunar soil sizes are found to be within the range of 1.40-9.35 μm,while 95% of the soils by mass are within the size range of 4.84-432.27 μm.The bulk density,true density and specific surface area of CE-5 soils are 1.2387 g/cm~3,3.1952 g/cm~3 and 0.56 m~2/g,respectively.Fragments from the CE-5 regolith are classified into igneous clasts(mostly basalt),agglutinate and glass.A few breccias were also found.The minerals and compositions of CE-5 soils are consistent with mare basalts and can be classified as low-Ti/low-Al/low-K type with lower rare-earth-element contents than materials rich in potassium,rare earth element and phosphorus.CE-5 soils have high FeO and low Mg index,which could represent a new class of basalt.

关键词： Chang’E-5 lunar soils physical properties petrography mineralogy chemistry

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Multicolumn solid phase extraction with hybrid adsorbent and rapid determination of Au,Pd and Pt in geological samples by GF-AAS

Multicolumn solid phase extraction with hybrid adsorbent and...

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中国科学院地质与地球物理研究所2015年度（第15届）...

作者： dingshuai xue Hongyue Wang Yanhong Liu Ping Shen Key Laboratory of Mineral Resources Institute of Geology & GeophysicsChinese Academy of Sciences

A novel hybrid adsorbent(HA)composed of cellulose fiber,activated carbon,and anion exchange resin Dowex 1×8 was prepared for the preconcentration and separation of noble metals,namely,gold(Au),palladium(Pd)and platinum(Pt),in geological samples.The optimal experimental parameters,such as flow rate,sample volume and interfering ions,were investigated.The accuracy of the method was confirmed by added/found method for tap and sea water,and evaluated by analyzing certified reference materials with good agreement.Under the optimal experimental conditions,the detection limits(3σcriteria)of the developed technique were 0.008 ng mL(Au),0.017 ng mL(Pd)and0.014 ng mL(Pt)and the sample throughput reach to 30 samples every eight hours,Moreover,the adsorption capacity of HA for Au,Pd and Pt was determined to be 4.8.2,35.9 and 29.8 mg g,respectively.

关键词： Precious metals GF-AAS Geological samples

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地质样品中钴、镍的分析进展

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岩石学报 2023年第4期39卷 1217-1232页

作者：薛丁帅李文君王静贾丽辉毛亚晶苏本勋中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所北京100029 中国科学院大学北京100049

早在20世纪初期,化学家就开展了比色法分析钴、镍的研究工作。由于比色法灵敏度不高且操作繁琐,人们开始追求更高效的固体样品消解方法、更简便的操作以及更高灵敏度和高精度的分析技术。在样品分解方面,逐渐发展出了酸溶和碱熔两套样... 详细信息

早在20世纪初期,化学家就开展了比色法分析钴、镍的研究工作。由于比色法灵敏度不高且操作繁琐,人们开始追求更高效的固体样品消解方法、更简便的操作以及更高灵敏度和高精度的分析技术。在样品分解方面,逐渐发展出了酸溶和碱熔两套样品分解体系;在仪器分析方面,则发展出了原子吸收光谱法、等离子体光谱法、X射线荧光光谱法、等离子体质谱法等更加高效简洁的仪器分析技术。随着地质科学的发展,电子探针和激光剥蚀电感耦合等离子体质谱微区原位分析技术,以及多接收等离子体质谱镍同位素分析技术也逐渐发展起来。在元素分析方面,原子吸收光谱法、等离子体光/质谱法一般需要经过酸或者碱将样品分解为溶液状态,前处理流程较为繁琐;而X射线荧光光谱法采用熔片或者压片进行样品制备,前处理方法简单高效,更加受到青睐。在同位素分析方面,镍同位素逐渐应用到钴镍矿床研究中,近年有望通过典型矿床剖析明确多种成矿过程镍同位素的行为与分馏机制,如岩浆演化、热液蚀变、风化等。镍同位素的分离技术难度较高,因此,创新镍同位素的分离过程和测试方法,并建立更加简便的分析流程是未来发展的重点方向。在微区分析方面,激光剥蚀-电感耦合等离子体质谱比电子探针的样品制备简单、分析速度快、成本低,更有发展潜力。本文总结了近百年来地质样品钴、镍分析方法的演变与突破,对比了各类方法的优缺点,展望了地质样品钴、镍分析方法的发展前景。

关键词：样品前处理比色法原子吸收光谱等离子体光谱 X射线荧光光谱电子探针 (多接收和激光剥蚀)等离子体质谱

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