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Compositions of chondrites
A compilation of data on 78 elements in the nine groups of chondrites shows each to be isochemical with the exception of a few volatiles. With the exception of the most volatile elements, the groupsExpand
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Progressive aqueous alteration of CM carbonaceous chondrites
Abstract CM chondrites are aqueously altered rocks that contain ∼9 wt% H 2 O + (i.e., indigenous water) bound in phyllosilicates; also present are clumps of serpentine-tochilinite intergrowthsExpand
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The origin of KREEP
KREEP is a lunar material having very high concentrations of incompatible elements; its name is an acronym for the incompatibles K, rare-earth elements (REE), and P. Although a few pristineExpand
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The IAB Iron-Meteorite Complex: A Group, Five Subgroups, Numerous Grouplets, Closely Related, Mainly Formed by Crystal Segregation in Rapidly Cooling Melts
Abstract We present new data for iron meteorites that are members of group IAB or are closely related to this large group, and we have also reevaluated some of our earlier data for these irons. InExpand
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Metal-silicate silicon isotope fractionation in enstatite meteorites and constraints on Earth's core formation
article Silicon has long been considered a possible light element in Earth's core. If differences in 30 Si/ 28 Si ratios between metal (core) and silicate (mantle and crust) can be quantified,Expand
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Classification and origin of IAB and IIICD iron meteorites
Abstract We have analyzed, by duplicate neutron-activation analysis, 125 members of iron meteorite groups IAB and IIICD. These data show no hiatus between the groups, and we recommend that the twoExpand
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Initial 26Al/27Al in carbonaceous-chondrite chondrules: too little 26Al to melt asteroids
We report 26Mg excesses correlated with Al/Mg ratios in five chondrules from the primitive CO3.0 chondrite Yamato 81020 that yield a mean initial 26Al/27Al ratio of only (3.8 ± 0.7) × 10−6, aboutExpand
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Mineralogy and Petrology of Amoeboid Olivine Inclusions in CO3 Chondrites: Relationship to Parent-Body Aqueous Alteration
Petrographic and mineralogic studies of amoeboid olivine inclusions (AOIs) in CO3 carbonaceous chondrites reveal that they are sensitive indicators of parent-body aqueous and thermal alteration. AsExpand
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Fractionation Trends Among IVA Iron Meteorites: Contrasts with IIIAB Trends
A neutron-activation study of 48 group-IVA irons shows much lower negative slopes on Ir-Au and Ir-As diagrams than observed in the larger magmatic group IIIAB. This difference seems to reflect theExpand
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