论文部分内容阅读
大坂塔格—一间房奥陶系剖面自下而上可划分为蓬莱坝组、鹰山组、一间房组、吐木休克组和良里塔格组。该剖面可以识别出6个三级层序,层序中体系域发育不全,由TST和HST构成。海侵体系域岩石类型以暗色泥晶灰岩、泥质灰岩、泥晶藻灰岩为主,发育水平层理及微波状层理,岩层厚度从中厚层状逐渐减至薄-纹层状。高水位体系域由一系列前积型的准层序组所组成。
Osaka Tagar - a room Ordovician section from bottom to top can be divided into Penglai Dam group, Yingshan group, a room group, Tumen shock group and Liang Litig group. The profile can identify 6 third-order sequences, the phylogenetic domain in the sequence is underdeveloped, and consists of TST and HST. The rocks of the transgressive system tract are dominated by dark margarite, argillite and mudstone algal limestone, with horizontal bedding and microwave-like stratification. The thickness of the strata gradually decreases from medium-thick to thin-lamellar . The high-water system tract consists of a series of pre-sedimentary quasi-sequence groups.