摘要
通过岩石学、沉积学分析 ,东昆仑祁漫塔格山志留纪白干湖组浊流沉积鲍玛序列以BC、AE、BCE、BCD段为主 ;粒度分布概率累积曲线斜率低、分布区间宽、悬浮总体含量大而分选差 ;古流向呈扇状 ,属近源浊积岩B、C相的浊积扇中扇环境 ,从下到上岩石粒度逐渐变细 ,沉积盆地水体逐渐变深 ,反映为浊积扇向海推进的弧后盆地沉积特征 ,这对分析本区地质构造演化具有重要意义。
The Buoma sequence of the turbidite in the Silurian Baiganhu Formation in Qimantage mountain of eastern Kunlun is dominant in the portions of BC, AE, BCE and BCD; the granular distributions are characterized by low gradient of the probability cumulative curve, extensive distribution, large content and poor sorting of the total suspension; the fan shaped paleocurrent direction indicated that formed in the turbidite fan in fan environment of proximal turbidite B and C facies, in which the granular of rocks becomes finer and the water in the sedimentary basin trends to deeper, reflecting the sedimentary features of back arc basin from promotion of the turbidite fan to the sea.
出处
《陕西地质》
2003年第2期39-44,共6页
Geology of Shaanxi
