东昆仑祁漫塔格山志留系白干湖组浊积岩特征  

THE TURBIDITE OF THE SILURIAN BAIGANHU FORMATION IN THE QIMANTAGE MOUNTAIN EASTERN KUNLUN

作　　者：黎敦朋[1] 李静[1] 张汉军 李新林 周小康 杜少喜 

机构地区：[1]陕西省地质调查院

出　　处：《陕西地质》2003年第2期39-44,共6页Geology of Shaanxi

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.

关 键 词：浊积岩 地质构造 中扇环境 岩石学 沉积学 志留纪 祁漫塔格山 

分 类 号：P588.21[天文地球—岩石学] P548[天文地球—地质学]