Publication Date:
2003-01-25
Description:
Hydrated minerals occur in accretionary rims around chondrules in CM chondrites. Previous models suggested that these phyllosilicates did not form by gas-solid reactions in the canonical solar nebula. We propose that chondrule-forming shock waves in icy regions of the nebula produced conditions that allowed rapid mineral hydration. The time scales for phyllosilicate formation are similar to the time it takes for a shocked system to cool from the temperature of phyllosilicate stability to that of water ice condensation. This scenario allows for simultaneous formation of chondrules and their fine-grained accretionary rims.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ciesla, Fred J -- Lauretta, Dante S -- Cohen, Barbara A -- Hood, Lon L -- New York, N.Y. -- Science. 2003 Jan 24;299(5606):549-52.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Planetary Sciences, Lunar and Planetary Laboratory, University of Arizona, 1629 East University Boulevard, Tucson, AZ 85721, USA. fciesla@lpl.arizona.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/12543970" target="_blank"〉PubMed〈/a〉
Keywords:
Ice
;
*Meteoroids
;
Pressure
;
*Silicates
;
Temperature
;
Thermodynamics
;
*Water
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
