湖北新洲盆地的形成与演化  

Formation and Evolution of Xinzhou Basin in Hubei Province

作　　者：杜小锋 周鼎 廖明芳 霍炬 万俊 徐聪 Du Xiaofeng;Zhou Ding;Liao Mingfang;Huo Ju;Wan Jun;Xu Cong(Hubei Geological Survey,Wuhan,Hubei 430034)

机构地区：[1]湖北省地质调查院,湖北武汉430034

出　　处：《资源环境与工程》2022年第3期314-320,共7页Resources Environment & Engineering

基　　金：2021年湖北省地质局科技项目——支撑服务武汉市高质量发展1∶10万系列地质图件编制(KJ2021-30)。

摘　　要：新洲盆地位于秦岭—大别造山带南缘,是白垩纪以来发育起来的陆相盆地,盆地内沉积多个韵律旋回的冲积扇—湖泊陆缘沉积体。盆地形成过程受滨太平洋运动的影响,控盆断裂主要为NNE向的团麻断裂,而近EW向的襄广断裂则控制了盆地的南部边界。通过区域地质背景研究、盆地内的沉积建造、控盆构造的演化、火山活动特征等对比分析,认为新洲盆地是断陷盆地,其演化可划分为3个阶段,即晚白垩世—古近纪早期盆地裂陷充填阶段、古近纪末期盆地萎缩封闭阶段、新近纪时期盆地差异升降阶段。Xinzhou Basin is located in the southern margin of Qinling-Dabie orogenic belt.It is a continental basin developed since Cretaceous.Multiple rhythmic cycles of alluvial fan lake continental margin sediments are deposited in the basin.The basin formation process is affected by the coastal Pacific movement.The basin controlling fault is mainly the NNE Tuanma fault,while the nearly EW Xiangguang fault controls the southern boundary of the basin.Through the comparative analysis of regional geological background,sedimentary formation in the basin,evolution of basin controlling structure and volcanic activity characteristics,it is considered that Xinzhou Basin is a faulted basin,and its evolution can be divided into three stages:basin filling and deposition stage from Late Cretaceous to early Paleogene,basin closing and denudation stage at the end of Paleogene and differential rise and fall stage of basin in Neogene.

关 键 词：新洲盆地 沉积建造 控盆断裂 盆地演化 

分 类 号：P544[天文地球—构造地质学]