A nebular origin for chondritic fine-grained phyllosilicates

被引：118

作者：

Ciesla, FJ

Lauretta, DS

Cohen, BA

Hood, LL

机构：

[1] Univ Arizona, Dept Planetary Sci, Lunar & Planetary Lab, Tucson, AZ 85721 USA

[2] Univ Hawaii, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA

来源：

SCIENCE | 2003年 / 299卷 / 5606期

关键词：

D O I：

10.1126/science.1079427

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

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页码：549 / 552

页数：6

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