应用宇宙成因核素^(10)Be和^(26)Al估算剥蚀面的暴露时间及剥蚀速率和剥蚀厚度  

Estimation of exposure time and erosion rate as well as thickness of erosion surface using cosmogenic nuclides ^(10)Be and ^(26)Al

作　　者：李储华[1] 纪友亮[2] 张世奇[1] 赵俊青[3] 

机构地区：[1]石油大学地球资源与信息学院,山东东营257061 [2]同济大学海洋与地球科学学院,上海200092 [3]中科院广州地化所,广东广州510640

出　　处：《石油大学学报（自然科学版）》2004年第1期1-4,共4页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：国家"973"项目资助 (G19990 43 3 0 4)

摘　　要：宇宙成因核素10 Be和2 6Al的浓度记录着岩层剥蚀面的暴露时间和岩石剥蚀速率等信息。利用数学换算法分析影响10 Be和2 6Al浓度的因素 ,并利用10 Be和2 6Al的半衰期的近似倍数关系建立联立方程组 ,从理论上得到了年轻地质体中遭受快速埋藏的剥蚀面的暴露时间和剥蚀速率的估算公式。在此基础上 ,对整个剥蚀区不同位置剥蚀速率进行了分析。通过分析可以更准确地估算出整个剥蚀区不同位置的剥蚀厚度 ,从而可恢复剥蚀面的古地貌。The concentrations of cosmogenic nuclides ^(10)Be and ^(26)Al recorded the messages of exposure time and denudation rate on the denuded surface. The factors influencing the concentration of ^(10)Be and ^(26)Al were analyzed. The united formulas were built according to the approximate multiple relation of half-life between ^(10)Be and ^(26)Al. The theoretical estimation formulas for denudation time and denudation rate of the young geology body were established. The denuded thickness of different locations in the denudation area can be estimated accurately by analyzing the denudation rate of denudation locations. Then the paleo-geomorphology can be reconstructed.

关 键 词：宇宙成因核素 ^10BE ^26Al 剥蚀面 暴露时间 剥蚀速率 剥蚀厚度 半衰期 放射性核素 

分 类 号：P618.13[天文地球—矿床学]