摘要
前第四纪准平原化阶段形成了含金风化壳和含金砂砾层.侵蚀基准面下降引起的侵蚀回春,使古含金地质体遭受侵蚀、搬运后,沉积在第四纪河谷中形成了新砂矿.这种夷平面的切割深度超过100m时,有利于新砂矿的形成.
The gold-bearing weathering crust and auriferous-sandy gravel were formed by peneplanation at the Pre-Quaternary stage. Owing to the rejuvenated erosion resulted from lowering of erosional reference level, old gold-bearing geological bodies were subjected to erosion and formed into new gold placers by transportation and sedimentation in Quaternary valleys. Such Planation surface with a cutting depth greater than 100 m is favourable for the formation of new gold placer.
出处
《地质与勘探》
CAS
CSCD
北大核心
1991年第6期17-21,共5页
Geology and Exploration
