Accretionary dark rims in unequilibrated chondrites
Accretionary dark rims in unequilibrated chondrites
复制标题
不平衡球粒陨石中的增生暗边缘
DOI：
10.1016/0019-1035(81)90056-7
复制
发表时间：
1980
期刊：
影响因子：
3.2
通讯作者：
E. A. King
中科院分区：
文献类型：
--
作者：
T. King;E. A. King
纹理和定性EDX调查的深色镶边颗粒在6个低岩石类型的陨石表明，轮辋增生的主机颗粒在很宽的温度范围内的初始积累和石化的陨石，其中镶边颗粒现在包含之前。许多深色边缘富含中等挥发性微量元素，如Na，Cl，P和K，相对于主机颗粒和基质。与超高速撞击相关的物理/化学环境的范围可能为太阳系历史早期暗边粒子的形成提供了背景。
Textural and qualitative EDX investigations of dark-rimmed particles in six low petrologic type chondrites indicate that the rims accreted on host particles over a wide range of temperatures prior to initial accumulation and lithification of the meteorites in which the rimmed particles are now contained. Many dark rims are enriched in moderately volatile trace elements such as Na, Cl, P, and K, relative to the host particles and matrix. The range of physical/chemical environments associated with hypervelocity impacts may have offered the setting for the formation of dark-rimmed particles early in solar system history.