新疆克拉麦里造山带下石炭统地层系统及其沉积构造背景  

Lower Carboniferous Stratigraphic System of Kelamaili Orogenic Belt,Xinjiang and Its Tectonic Setting

作　　者：杨品荣[1] 杨文强[1] 蒙有言[1] 冯庆来[2] 

机构地区：[1]中国地质大学研究生院,武汉430074 [2]中国地质大学地质过程与矿产资源国家重点实验室,武汉430074

出　　处：《地质科技情报》2007年第5期6-10,共5页Geological Science and Technology Information

基　　金：中国石油化工股份有限公司新疆勘探公司项目"陆梁隆起东部地区石炭系-侏罗系地层;沉积;储层研究及有利目标预测"

摘　　要：新疆克拉麦里造山带位于准噶尔与西伯利亚板块之间。下石炭统是该造山带的重要组成部分,前人将其作为一个地层层序,自下而上划分为黑山头组、姜巴斯套组和那林卡拉组。运用造山带地层学研究其下石炭统地层系统,识别出西伯利亚板块南缘岛弧盆地层序(黑山头组)、弧前大陆边缘盆地层序(卡姆斯特组)、洋盆层序(放射虫硅质岩和蛇绿混杂岩),以及准噶尔板块北缘岛弧盆地层序(塔木岗组和松喀尔苏组)和弧前大陆边缘盆地层序(东古鲁巴斯套组和姜巴斯套组)。根据克拉麦里造山带两侧均存在岛弧盆地层序,推论克拉麦里洋盆曾在早石炭世向两侧发生俯冲。Kelamaili orogenic belt, located on the northeastern margin of Junggar basin, is an important tectonic unit in central Asia geology. There is a controversy regarding its evolution although a lot of work has been carried out on the belt. According to orogenic belt stratigraphy theory, every stratigraphic sequence should be corresponding with a tectonic basin. Five Lower Carboniferous stratigraphic sequences, including one oceanic basin sequence, two island arc sequences and two forearc basin sequences, are differentiated in the studied area. Stratigraphic system representing Lower Carboniferous paleogeographic pattern is reconstructured for the area. The Kelamaili oceanic shell should subduct toward its both sides in Early Carboniferous because there are two island arc stratigraphic sequences in/on both sides of the oceanic basin sequence. K

关 键 词：地层学 造山带 构造背景 早石炭世 新疆北部 

分 类 号：P534.45[天文地球—古生物学与地层学]