Secondary processing of chondrules and refractory inclusions (CAIs) by gasdynamic heating.
Secondary processing of chondrules and refractory inclusions (CAIs) by gasdynamic heating.
复制标题
通过气体动力加热对球粒和耐火夹杂物 (CAI) 进行二次加工。
DOI：
10.1006/icar.1993.1085
复制
发表时间：
1993
期刊：
影响因子：
3.2
通讯作者：
R. Reynolds
中科院分区：
文献类型：
--
作者：
M. Podolak;D. Prialnik;T. Bunch;P. Cassen;R. Reynolds
给出了流星粒子进入母体大气时气动加热的理论模型。该模型考虑了颗粒内部的熔化、汽化和热传导的影响。球粒规则轮缘的属性在模型的上下文中进行解释。我们的结论是，大气进入形成真正的熔融边缘需要在边缘形成之前在球粒陨石的外部分离出低熔点温度成分，并且在UOC球粒陨石中观察到的热蚀变效应的范围反映了相遇条件和球粒陨石类型的变化。建议对该模型进行进一步的检验。
A theoretical model of aerodynamic heating of a meteoric particle upon entry into a parent body atmosphere is presented. The model includes the effects of melting, vaporization, and heat conduction into the particle interior. Properties of chondrule rims are interpreted in the context of the model. We conclude that the formation of true melt rims by atmospheric entry requires that a low-melting-temperature component be fractionated in the outer part of the chondrule prior to rim formation, and that the range of thermal alteration effects observed in UOC chondrites reflects the variety of encounter conditions and chondrite types. Further tests of the model are suggested.