Isotopic composition of silver in iron meteorites
نویسندگان
چکیده
منابع مشابه
Molybdenum Isotopic Composition of Iron Meteorites, Chondrites and Refractory Inclusions
Introduction. Recent Mo isotopic studies of meteorites reported evidence for differences in isotopic compositions for whole rocks of some primitive [1-3] and differentiated meteorites [2,4], relative to terrestrial materials. Enrichments of rand p-process isotopes of up to 3-4 ε units (ε unit = parts in 10) over s-process dominated isotopes are the most prominent features. Certain types of pres...
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Introduction The scientific community has actively debated for quite some time the possibility that conditions were once favorable for life to originate and evolve on Mars. However, as we know it, for life to survive, the presence of liquid water is essential. The present day climate on Mars is inhospitable for sustaining any life form. However, recent data from twin rovers, Spirit and Opportun...
متن کاملENDEMIC Ru ISOTOPIC ANOMALIES IN IRON METEORITES AND IN ALLENDE
Small variations for Mo isotopes have been observed recently in the Allende meteorite and in iron meteorites, mesosiderites, and pallasites, using ICP-MS [1]. Large effects for Mo have been reported for leaches of Orgueil [2] and in SiC and graphite from Murchison [3-5]. Variations for Mo in bulk Allende and in Murchison have also been presented by NTIMS [6]. Effects in Ru isotopes can define f...
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Title of Document: The Multiple Sulfur Isotopic Composition of Iron Meteorites: Implications for Nebular Evolution. Michael Ariel Antonelli, Master of Science, 2013. Directed By: Professor James Farquhar, Department of Geology and Earth System Sciences Interdisciplinary Center, University of MarylandCollege Park Multiple sulfur isotopic measurements of troilite from 61 different iron meteorites...
متن کاملNickel Isotopic Compositions in Pallasites and Iron Meteorites
We report Ni isotope ratio results for Ni from metal in iron meteorites and from metal and olivine in pallasites. The investigation of pallasites was undertaken because (1) previous work on pallasites showed evidence for in situ decay of Mn (t1⁄2 = 3.7 Ma) in olivines [1,2] and of Pd (t1⁄2 =6.5 Ma) in metal [3]; (2) evidence for the in situ decay of Fe (t1⁄2 = 1.5 Ma) in eucrites [4,5]; (3) pos...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research
سال: 1964
ISSN: 0148-0227
DOI: 10.1029/jz069i003p00505