Linked Life Data

17641194

Source:http://linkedlifedata.com/resource/pubmed/id/17641194

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5836
pubmed:dateCreated
2007-7-20
pubmed:abstractText
Eucrites are a group of meteorites that represent the first planetary igneous activity following metal-silicate differentiation on an early planetesimal, similar to Asteroid 4 Vesta, and, thus, help date geophysical processes occurring on such bodies in the early solar system. Using the short-lived radionuclide (182)Hf as a relative chronometer, we demonstrate that eucrite zircon crystallized quickly within 6.8 million years of metal-silicate differentiation. This implies that mantle differentiation on the eucrite parent body occurred during a period when internal heat from the decay of (26)Al and (60)Fe was still available. Later metamorphism of eucrites took place at least 8.9 million years after the zircons crystallized and was likely caused by heating from impacts, or by burial under hot material excavated by impacts, rather than from lava flows. Thus, the timing of eucrite formation and of mantle differentiation is constrained.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Jul
pubmed:issn
1095-9203
pubmed:author
pubmed:issnType
Electronic
pubmed:day
20
pubmed:volume
317
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
345-7
pubmed:year
2007
pubmed:articleTitle
The crystallization age of eucrite zircon.
pubmed:affiliation
Department of Geology, University of Toronto, Toronto, ON, Canada, M5S 3B1. srini@geology.utoronto.ca
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't