Mathematics – Logic
Scientific paper
Nov 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009e%26psl.288..611l&link_type=abstract
Earth and Planetary Science Letters, Volume 288, Issue 3-4, p. 611-618.
Mathematics
Logic
7
Scientific paper
Eight samples spanning the bulk chemical range of monomict ureilites, have been analyzed for their W isotopic composition and Hf/W in order to elucidate the differentiation history of the ureilite parent body. The ureilites studied here show sub-chondritic Hf and W concentrations and low Hf/W ratio, and all show clear 182W deficits relative to bulk chondrites. The W isotope data provide evidence that the ureilite parent body differentiated within 1 to 2 million years after the start of the solar system. Such early accretion and differentiation is comparable to the parent bodies of various magmatic iron meteorites, as well as the HED parent body. However, the trace element fractionations and by inference melting processes are very different. An early smelting/partial melting event coupled with metal-silicate segregation, however, can reproduce the observed Hf-W data in ureilites, and is consistent with petrological and other chemical evidence for a missing basaltic component and with primitive oxygen and noble gases compositions.
Grove Timothy L.
Halliday Alex N.
Lee Der-Chuen
Singletary Steven J.
No associations
LandOfFree
182Hf-182W chronometry and early differentiation of the ureilite parent body does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with 182Hf-182W chronometry and early differentiation of the ureilite parent body, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 182Hf-182W chronometry and early differentiation of the ureilite parent body will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1264152