中生代焉耆盆地演化特征  

The evolution characteristic of Yanqi Basin in the Mesozoic

作　　者：陈建军[1] 刘池阳[1] 姚亚明[2] 陈建中 段心建[4] 

机构地区：[1]西北大学大陆动力学国家重点实验室,陕西西安710069 [2]郑州经济管理干部学院环境工程系,河南郑州450052 [3]新疆地质矿产勘查局第三地质队,新疆库尔勒841000 [4]河南油田公司勘探开发研究院,河南南阳473132

出　　处：《西北大学学报（自然科学版）》2007年第2期287-290,共4页Journal of Northwest University（Natural Science Edition）

基　　金：国家重点基础研究发展规划基金资助项目(2003CB214607)

摘　　要：目的探讨焉耆盆地中生代盆地的演化。方法通过盆地断裂活动特征、沉积演化特征探讨盆地演化阶段。结果盆地断裂活动分为3个阶段,中晚三叠世挤压断层发育阶段、侏罗纪—早白垩世伸展正断层发育阶段和晚白垩世挤压逆冲断层发育阶段;沉积演化分为两个阶段,中—晚三叠世挤压环境的辫状河—浅湖相沉积,早—中侏罗世伸展环境的辫状河—浅湖相沉积。结论焉耆盆地中生代的演化可分为中晚三叠世前陆盆地阶段、侏罗纪—早白垩世的伸展阶段和晚白垩世的挤压抬升阶段3个阶段。Ahn To discuss the Yanqi Basin evolution phases in the Mesozoic. Methods Disscuss the basin evolvement phases according to the characteristic of the basin stratum, fault activity and depositional evolution. Resuits The basin fracture activity had the three activity phases： the phase of extruded fault in Middle-Late Trias, extensional positive fault in Jurassic-Early Cretaceous and thrust fault in Late Cretaceous. Yanqi Basin depisitional phase included river-shallow-lake facies under extrusion in Middle-Late Trias and river-shallow-lake facies under extensional surroundings in Early-Middle Jurassic. Conclusion Three phases were partitioned on the Mesozoic Yanqi Basin evolvement： foreland basin phase in Middle-Late Trias, extensional phase in Jurassic-Early Cretaceous and extruded-raised phase in Late Cretaceous.

关 键 词：中生代 断裂 沉积演化 盆地演化 

分 类 号：P618.130.2[天文地球—矿床学]