摘要
对桂林一带分布较广的第四系亚粘土砾石层的成因和时代,前人做过不少工作,提出过诸如冰川堆积物等看法。我们在进行1:20万水文地质普查时,有针对性地勘探剖面和测制人工露头剖面各两条。根据采集样品的差热、光谱、化学和孢粉分析,说明它的沉积环境是湿热的。根据堆积的展布和岩性特征,以及^(14)C年代测定资料认为,这一套堆积物属第四系中更新统泥石流堆积,并非冰川和冰水堆积物。
Predecessors have done quite a lot of investigations and studies on genesis and era of widespread clayey-gravel in Guilin, and advanced many views such as glacial sediment. We prospected two profiles and mapped two artificial exposure profiles during the hydrogeologic reconnaissance on scale of 1:200 000. According to differential thermal, spectral, chemical and spore-pollen analyses of collected samples the sedimentary environment is shown to be damp and hot. In the light of distribution and lithological features of the sediment, and 14C age data this paper consider the sediment to be Middle Pleislocene series mudflow sediment and not to be glacial and outwash sediment.
出处
《冰川冻土》
CSCD
北大核心
1991年第2期147-157,共11页
Journal of Glaciology and Geocryology
