 | | Journal (article/letter/editorial) | | olivine-hypersthene chondrites characterized by comparatively iron-rich olivine (FE+,,,_,,) and orthopyroxene (Fs,...,,,) and a low content (1-5O/O)of nickel-iron. Other minerals include plagioclase (composition around...investigation of Manbhoom, and pointed out that this meteorite did contain chondrules, although they are sparse...brecciated; however, it is clear that the type meteorite for the rodites is Roda, which is quite different...6 7 8 Y 10 11 12 Jelica; LIXANITSCH, 1892. Appley Bridge; WIIR, unpublished; H,O+, 0.17; H,O-, 0.00; |  | | Journal (article/letter/editorial) | | lead and thallium in the matrix of the Allende meteorite and the extent of terrestrial lead contamination...University of Oxford, Parks Road, Oxford OX1 3PR (England) Received September 17, 1982 Revised version received...composition of two matrix fractions and whole meteorite were measured and found to be indistinguishable...5 U - 2 ° 7 p b , 232Th-2°8pb and 2°7pb-2°6pb meteorite ages, and the related scatter on the U-Pb and...troilite phase of the Cation Diablo iron meteorite. Further, whole meteorite or separated mineral phases from |  | | Journal (article/letter/editorial) | | article: refractory inclusions of the Allende meteorite, phosphates in ordinary chondrites and basaltic...The proximity of this estimate to the 4.55 Ga meteorite isochron (Patterson, 1956), represented as the...1979a,b) or meteorite groups (Gopalan and Wetherill, 1968, 1969; Minster et al., 1982). Iron Meteorites...original Pb-Pb meteorite isochron (Patterson, 1956) is constructed with the lead data from two iron meteorites...meteoritic material! More recent lead studies of iron meteorites (Tatsumoto et al., 1973; Chen and Wasserburg |  | | Journal (article/letter/editorial) | | differences in the times of f o r m a t i o n of the meteorite p a r e n t bodies or to either partial or complete...interpretation. First, there is at least one meteorite from each of the ordinary chondrite groups which...Second, the initial 2°~pb/2°4pb ratios in the meteorite parent bodies would have had to vary by a factor...would not account for the discordancy of some meteorite data, but the possibility of some terrestrial...whole-rock splits from these meteorites. Troilite in iron meteorites may contain several ppm Pb but virtually |  | | Journal (article/letter/editorial) | | in-situ decay of U. Different samples of the same meteorite show different Pb/Pb model ages. In cases when...and the P b / P b model age if we consider all meteorite types. However, if we consider only the H chondrites...for the refractory inclusions of the Allende meteorite (t = 4.566 _+ c. G6pel et al. / Earth and Planetary...and R.O. Hutchison, U-Pb studies of the Appley Bridge Meteorite. Nature 66, 419-420, 1979. [7] D.M. Unruh...Barwell chondrite: anatomy of a 'discordant' meteorite, Proc. Lunar. Sci. Conf. 10, 1011-1030, 1979. |
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