摘要
1∶2 0万区域水系沉积物地球化学测量结果显示 ,阿坝盆地 4 0种元素簇群特征明显 ,按其相关性可划分为三大组合 ,明显富集Si、Zr、Ca、Na、Sr、La ,贫化Fe、Cr、Ni、Ti、K、Al。元素组合及分布均表现为风化残积的表生地球化学特点 ,表明盆地区现今仍以沉积为主 ,侵蚀作用居次要地位。阿坝盆地是一个发育在断裂带下降盘并逐渐向南西迁移的不对称箕状断陷盆地。
regional geochemical survey shows that the Aba basin is characterized by 40 element clusters which may be divided into 3 associations on the basis of their correlation,with obvious enrichment in Si,Zr,Ca,Na,Sr,La and depletion in Fe,Cr,Ni,Ti,K,Al Element associations and their distribution are characteristic of eluvium which indicates that in the basin sedimentation dominated over erosion Aba basin is a faulted basin which is a southward migrationg and asymmetric skip basin
出处
《四川地质学报》
2000年第3期216-220,共5页
Acta Geologica Sichuan
关键词
阿坝盆地
区域地球化学
水系沉积物测量
Aba basin,regional geochemistry,stream sediment survey,geological significance
