岩庄陨石橄榄石的冲击效应  

THE SHOCK EFFECTS OF OLIVINE IN THE YANZHUANG CHONDRITE

作　　者：陈鸣[1] 谢先德[1] 

机构地区：[1]中国科学院地球化学研究所广州分部,广州510640

出　　处：《矿物学报》1993年第2期108-114,T002,共8页Acta Mineralogica Sinica

基　　金：北京中关村联合分析测试中心的资助

摘　　要：岩庄陨石在太空中经受过极高能的冲击碰撞、陨石中橄榄石出现的冲击效应包括:面状裂隙、位错、镶嵌状结构、砾化结构、固态转变以及熔融重结晶等。其中首次找到了天然击变玻璃,并发现两种产状的林伍德石。研究证实岩庄陨石经受的冲击波峰压高达100GPa,温度峰值大于2000℃。The Yanzhuang chondrite had undergone a violent impact event in space. The shock effects of olivine in the chondrite are reflected by: planar fractures, dislocations, mosaic and brecciated textures, solid-state transformation, melting and recrystallization. It is the first time that shock-produced thetomorphic glass of olivine has been discovered in a meteorite. The shock peak pressure and temperature imposed on the meteorite are estimated to be as high as 100 GPa and 2000℃.

关 键 词：球粒陨石 陨石 橄榄石 冲击效应 

分 类 号：P68[天文地球—地质学]