摘要
吉林陨石钻孔样品^(53)Mn深度剖面进一步表明吉林陨石经历了二阶段暴露历史:第一阶段母体经受2π宇宙射线辐照,时间约为10Ma;第二阶段母体经受4π宇宙射线辐照,时间约为0.5Ma。
Core samples of the Jilin chondrite have been determined for cosmogenic 53Mn. The 53Ma profile in the Jilin chondrite can be explained in terms of a two-stage exposure history. The first stage occurred near the surface of the parent body in 2π geometry and lasted about 10 Ma. The Jilin was then expelled from its parent body and exposed to cosmic rays in the se-cond (4π) stage which lasted about 0.5 Ma.
出处
《地球化学》
CAS
1988年第4期363-367,共5页
Geochimica
