博格达山下二叠统塔什库拉组沉积特征及古地理分析

The Analysis about Sedimentary Features and Palaeogeography of Tashenkula Formation of Lower Permian in Bogda Mountain

博格达山属于晚古生代的陆间裂谷。在早二叠世晚期,它为走向近东西的槽型盆地。盆地轴部位于博格达北坡及主峰一带,南北两侧为构造控制的高角度斜坡。斜坡上发育块体搬运的重力流沉积和内陆棚粗粒风暴岩。块体搬运的重力流顺斜坡演化为浊流,进入盆地轴部后转为由东往西顺盆地走向流动,并在轴部形成一套经典浊积岩。

Bogda was a rift basin in late Palaeozonic. During late time of early Permian it was a narrow basin extending along east-west with axial belt in the peak and north side of Bogda Mountains. Multiforms of mass transported deposits and coarse-grained tempestite were formed on slopes. The turbidity current transformed from gravitational sliding on slopes were transported from east to west along the axis of the basin.