库鲁克塔格地区巷古勒塔格组瘤状灰岩及其沉积环境  

NODULAR LIMESTONE IN THE WARTY SEDIMENTARY SEQENCE OF THE HANGULETAG FORMATION IN KURUKTAG, XINJIANG

作　　者：白云风[1] 程日辉[2] 王璞珺[2] 刘万洙[2] 

机构地区：[1]中国地质大学(武汉)资源学院,湖北武汉430074 [2]吉林大学地球科学学院,吉林长春130061

出　　处：《新疆地质》2006年第4期361-364,I0010,共5页Xinjiang Geology

摘　　要：新疆库鲁克塔格地区巷古勒塔格组发育瘤状灰岩,是一种深水沉积序列.本区瘤状灰岩形成于台缘斜坡带,滑塌重力流改造原岩形态,并分为富泥型、过渡型及富灰型3种类型.富泥型瘤状灰岩沉积在CCD线之下,受深度海水溶解作用改造.过渡型瘤状灰岩形成在CCD附近,受海底底流和深度海水溶解的双重作用改造.富灰型瘤状灰岩形成在CCD之上,受周期性的重力流作用的改造和海底底流的溶解作用.岩性组合表明,早奥陶世库鲁克塔格地区处于迅速海侵阶段.Nodular limestones of Hanguletag formation in the Kuruktag are part of a type of warty sedimentary sequence The nodular limestone is developed in the slop of platform margin and was rebuilt by slumping and gravity flow. There are three types of nodular limestone including mud-rich, transitional and lime-rich. The mud-rich noduar limestone was deposited under the CCD and was dissolved in the deep sea-water. The transitional nodular limestone was deposited near the CCD and was dissolved by both bottom current of sea floor and deep sea water. The lime-rich nodular limestone was deposited above CCD and was rebuilt by periodical gravity flow and dissolved by bottom current of sea floor, These litbologic associations suggest that the Kuruktag was formed during a stage of rapid transgression in the early-Ordovician.

关 键 词：库鲁克塔格 巷古勒塔格组 瘤状灰岩 深水沉积序列 海侵 

分 类 号：P581[天文地球—岩石学]