月球物质的Re-Os同位素组成研究:对月球后期增生历史的指示
Re-Os isotopic compositions of lunar materials:Implication for late accretion history of the Moon
查看参考文献19篇
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文摘
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Re-Os同位素体系是理解月球强亲铁元素的分布规律和示踪月球的后期增生历史的重要手段.目前人们对月球物质Re-Os同位素成分的了解还是十分有限的,已有的Re-Os同位素数据显示一些能代表月幔成分特征的月海玄武岩具有很低的Re和Os的浓度,以及类似于球粒陨石的~(187)Os/~(188)Os成分特征,而月球火山玻璃和月壤等表现出相对高的Re、Os丰度和相对富放射成因Re-Os同位素成分.一般认为月球月幔的Re-Os和其他强亲铁元素相对球粒陨石是非常亏损的,而地球地幔则具有相对较高的强亲铁元素丰度(0.008倍CI球粒陨石的丰度).新的Re-Os同位素结果证明月幔确实是亏损的,但是月球和地球在太阳系演化的较晚时期都有外来的球粒陨石物质的大量加入,即后期增生(late accretion)过程,导致了月球和地球上部物质(如月球火山玻璃、月壤等)相对地富集Os同位素和强亲铁元素,这些外来物质的后期增生可能是长期和持续的,增生过程主要发生在3.9～4.4 Ga.但目前仍不清楚后期增生的陨石物质是被逐渐加入的,还是在一个相对较短的时期大量加入的,因此尚需对更多的月球物质做进一步的Re.Os同位素和强亲铁元素成分的研究. |
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其他语种文摘
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Re-Os isotopic system is a particularly valuable tool to understand distributions of highly siderophile elements (HSE) within lunar mantle, and trace late accretion history of the Moon. It is still unclear for Re-Os isotopic compositions of the lunar materials. Published Re-Os isotopic data show that the mare basahs have very low Re and Os concentrations as well as long-term, chondritic ~(187)Os/~(188)Os ratios, meanwhile some lunar volc anic glasses and soils have relatively high Re and Os abundances as well as radiogenic Re-Os isotopic composition. It is generally accepted that HSE of the lunar mantle were depleted relative to chondrites, but those of Earth's mantle has sufficiently high abundances of the HSE (ca. 0. 008 times CI chondrite abundances). New Re-Os isotopic results of the lunar materials comfirm that the lunar mantle is indeed depleted, but a significant portion of the lunar and terrestrial late veneer may have been added relatively late in the evolution of the solar system by addition of meteoritic contaminant, I.e., late accretion, resulting in enrichment of Os isotope and HSE on upper materials of the Earth and Moon. This late accretion process was long and prolonged. The late accreted materials were mainly added to the Earth-Moon system during 3.9 - 4. 4 Ga. However, it is remain unknown if this late-accreted material was progressively added, or largely added during a relatively short time interval, which requires further Re-Os isotopic and HSE investigation for more lunar materials. |
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来源
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地球化学
,2010,39(2):142-148 【核心库】
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关键词
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月球
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Re-Os同位素
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后期增生
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月球玻璃
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陨石
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地址
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中国科学院广州地球化学研究所, 广东, 广州, 510640
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0379-1726 |
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学科
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天文学;地质学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:3865492
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参考文献 共
19
共1页
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1.
Shen J J. Precise Re-Os determinations and systematics of iron meteorites.
Geochimica et Cosmochimica Acta,1996,60(15):2887-2900
|
被引
38
次
|
|
|
|
|
2.
Smoliar M I. Re-Os ages of group ⅡA,II1 A,IVA,and Ⅳ B iron meteorites.
SCIENCE,1996,271(5252):1099-1102
|
被引
313
次
|
|
|
|
|
3.
Morgan J W. Osmium isotope constraints on earth's late aceretionary history.
NATURE,1985,317(6039):703-705
|
被引
6
次
|
|
|
|
|
4.
Meisel T. The osmium isotopic composition of the Earth's primitive upper mantle.
NATURE,1996,383(6600):517-520
|
被引
41
次
|
|
|
|
|
5.
Walker R J. Re-Os systematics of early Proterozoic ferropicrites,Pechenga Complex,northwestern Russia:Evidence for ancient ~(187)Os-enriched plumes.
Geochimica et Cosmochimica Acta,1997,61(15):3145-3160
|
被引
11
次
|
|
|
|
|
6.
Shirey S B. The Re-Os isotope system in cosmochemistry and high-temperature geochemistry.
Ann Rev Earth Planet Sci,1998,26:423-500
|
被引
140
次
|
|
|
|
|
7.
Birck J L. Contrasting Re/Os mngmatic fractionntion in planetary basalts.
Earth and Planetary Science Letters,1994,124(1/4):139-148
|
被引
9
次
|
|
|
|
|
8.
Walker R J. Low abundances of highly siderophile elements in the lunar mantle:Evidence for prolonged late accretion.
Earth and Planetary Science Letters,2004,224(3/4):399-413
|
被引
3
次
|
|
|
|
|
9.
Papanastassiou D A. Exotic siderophiles on the Lunar surface.
NLSI Lunar Science Conference,2008,LPI Contribution No.1415,2009
|
被引
1
次
|
|
|
|
|
10.
Day J M 13. Accretion,differentiation,and late bombardment history of the Moon deduced from Re-Os isotope systematics of mare bosalts.
37th Annual Lunar and Planetary Science Conference,2006
|
被引
1
次
|
|
|
|
|
11.
Day J M D. Highly siderophile element constraints on accretion and differentiation of the Earth-Moon system.
SCIENCE,2007,315(5809):217-219
|
被引
10
次
|
|
|
|
|
12.
Benz W. The origin of the Moon and the singh-impact hypothesis Ⅲ.
Icarns,1989,81(1):113-131
|
被引
1
次
|
|
|
|
|
13.
O'Neill H St C. The origin of the moon and the early history of the earth-A chemical model.Part Ⅰ:The moon.
Geochim Cosmachim Acts,1991,55(4):1135-1157
|
被引
1
次
|
|
|
|
|
14.
Ringwood A E. Volatile and siderophile element geochemistry of the Moon:A reappraisal.
Earth and Planetary Science Letters,1992,111(2/4):537-555
|
被引
2
次
|
|
|
|
|
15.
Wolf R. Lunar basalts and pristine highland rocks-Comparison of siderophile and volatile elements.
Proceedings of the 10th Lunar and Planetary Science Conference,1979:2107-2130
|
被引
1
次
|
|
|
|
|
16.
Morgan J W. 74001 drive tube-Siderophile elements match ⅡB iron meteorite pattern.
Proceedings of the 10th Lunar and Planetary Science Conference,1979:327-340
|
被引
1
次
|
|
|
|
|
17.
Morgan J W. Sudace-oorrelated trace elements in 15426 lunar glasses (abs).
Lunar Planet Sci,1984,15:562-563
|
被引
1
次
|
|
|
|
|
18.
Carlson R. The age of ferroan anorthosite 60025 --Oldest crust on a young moon?.
Earth and Planetary Science Letters,1988,90(2):119-130
|
被引
1
次
|
|
|
|
|
19.
Chen J H. Re-Os isotope systematics in lunar soils and breccias.
33rd Annual Lunar and Planetary Science Conference,2002
|
被引
1
次
|
|
|
|
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