摘要
黄山第四纪泥砾沉积物的砾石组构特征表明,砾石AB面和A轴都倾向上游,倾角较大;沉积物粒度特征表明,频率曲线呈双峰式,累积曲线平缓,δ_1介于1.4—2.0之间,Sk_1在0左右摆动,趋向正偏态,Kg在0.678—0.788之间。上述特征反映出沉积物不是流水或冰川作用形成。通过综合分析,得到该类沉积物是经过季风型冰缘环境作用后的季风型间冰缘期的泥石流沉积物。
There are a lot of the Quaternary mudstones in the Mount Huangshan. The characterestics of debris fabric at the typical sections show: AB plane and A axis trend to
wards their headwaters; inclinations are bigger,——inclination of AB plane is about 36.0-
51.0 ° , and that of A axis is about 30-33.0° . The analysis of the deposit size shows that, the frequency curve of the deposit size takes in the form of double peaks; the accumulative curve is smooth; δ1 lies between 1.4-2.0; Sk1 nearly above 0, trending to be positive; and Kg lies between 0.678-0.788. The characterestics of the debris fabric and size of sediment show that the mudstone sediment of the Quaternary in the Mount Huangshan was neither the deposit of flowing water nor the glacial one. The sediment of mud-rock flow was formed by the common faction of the periglacial and interperiglacial environments of the monsoon-type.
出处
《冰川冻土》
CSCD
北大核心
1992年第4期360-365,共6页
Journal of Glaciology and Geocryology
基金
安徽省教委科研基金资助课题
关键词
第四纪
泥砾
沉积物
成因
泥石流
Mount Huangshan, mudstone sediment, mud-rock flow, periglacial environment of the monsoon-type, interperiglacial environment of the monsoon-type
