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NASA Technical Reports Server (NTRS) 20050166979: Li Isotope Studie... |
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by NASA Technical Reports Server (NTRS) |
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Variations in the ratio of the stable isotopes of Li are |
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a potentially powerful tracer of processes in planetary |
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and nebular environments [1]. Large differences in the |
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7Li/6Li ratio between the terrestrial upper mantle and |
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various crustal materials make Li isotope composition a |
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potentially powerful tracer of crustal recycling |
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processes on Earth [2]. Recent SIMS studies of |
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terrestrial mantle and Martian meteorite samples report |
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intra-mineral Li isotope zoning [3-5]. Substantial Li |
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isotope heterogeneity also exists within and between the |
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components of chondritic meteorites [6,7]. Experimental |
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studies of Li diffusion suggest the potential for rapid |
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isotope exchange at elevated temperatures [8]. Large |
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variations in 7Li, exceeding the range of unaltered |
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basalts, occur in terrestrial mantle-derived xenoliths |
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from individual localities [9]. The origins of these |
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variations are not fully understood. |
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Date Published: 2016-10-25 07:18:38 |
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Identifier: NASA_NTRS_Archive_20050166979 |
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Item Size: 2218298 |
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Language: english |
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Media Type: texts |
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