摘要
阿尔泰山大罗坝地区第四纪沉积物覆盖面积较大,平均厚度超过3m。沉积物分选性很差,其重矿物组成中以较稳定矿物和不稳定矿物为主。沉积物类型较复杂,初步划分有:残坡积、洪积、冲洪积、冲积和沼泽沉积。其中以冲积物和冲洪积物与砂金关系最为密切,含金量较高,其分布范围是砂金相对富集区,这是该地区沉积物的成因所决定的。
Daluoba region is extensively covered by Quaternary sediments, The average thickness of the sediments is over three meters. The heavy mineral are composed of stable and unstable mineral. The type of sediments has been preliminarily determined to be eluvial-slope wash, proluvial, diluvial-alluviation, alluviation and swamp. Among the sediments, the placer-gold is relatively plentiful in this distributing areas of wash and pluvial material. Through prelimi-nary analysis to the sedimentary features of wash-pluvial material and eluvial-slope wash, and the features of placer-gold in this area, the paper considers that the high content of gold in washpluvial material of Daluoba region is result from distribution of different sediments in this area.
出处
《干旱区地理》
CSCD
北大核心
1992年第1期92-98,共7页
Arid Land Geography
