东昆仑造山带海西—印支期东昆南前陆盆地构造岩相古地理  

HERCYNIAN INDOSINIAN TECTONIC LITHOFACIES PALEOGEO GRAPHY OF THE SOUTH OF EASTERN KUNLUN FORLAND BASIN OF EASTERN KUNLUN OROGENIC BELT

作　　者：田军[1] 张克信[2] 龚一鸣[2] 王国灿[2] 

机构地区：[1]同济大学海洋地质教育部重点实验室,上海200092 [2]中国地质大学地球科学学院,湖北武汉430074

出　　处：《现代地质》2001年第1期21-26,共6页Geoscience

基　　金：国土资源部"中国西部不同类型造山带及非史密斯地层区 1: 2 5万填图方法研究"项目! (I47C0 0 10 0 2 )

摘　　要：地层相态的恢复对于研究非史密斯地层区沉积盆地的演化过程有着非常重要的意义。在1∶ 2 5万野外地质填图基础上作出了东昆仑造山带东段东昆南前陆盆地晚二叠世至中三叠世构造岩相古地理图 ,该系列图揭示了东昆南前陆盆地在 5个发展阶段中的岩相分布特征和空间上的古地理展布范围 ,即晚二叠世早期东昆南前陆盆地发育的初始阶段、晚二叠世晚期前陆盆地的扩展至短期萎缩阶段、早三叠世早期前陆盆地的再次扩展阶段、早三叠世晚期盆地发育的高峰阶段和中二叠世前陆盆地的萎缩至消亡阶段。The recovery of sedimentary facies of non smithian stratum is critical to the understanding of evolution of a basin. Based on the 1∶250,000 mapping of the east part of eastern Kunlun orogenic belt, the tectonic lithofacies paleogeographic maps of south of eastern Kunlun forland basin from Late Permian to Middle Trassic are supplied to study its lithofacies evolutions and its paleogeographic distributions both on temporal and on spatial. The evolution of south of eastern Kunlun forland basin experienced five stages: the initial stage of the basin of P 1 3, the expanding and the short term shrinking stage of the basin of P 2 3, the second expanding stage of the basin of T 1 1, the summit stage of the basin of T 2 1 and the shrinking and disappear stage of the basin of T 2. To some extent, the facies evolution reflects the tectonic controls on the sedimentation of the forland basin.

关 键 词：东昆仓造山带 前陆盆地 构造岩相古地理图 沉积构造 

分 类 号：P544.4[天文地球—构造地质学]