金衢盆地的原型及其含油气前景  

The Prototype of Jinhua-Quzhou Basin and Its Gas and Oil Foreground

作　　者：祖辅平[1] 舒良树[1] 沈骥千[2] 李成[1] 

机构地区：[1]南京大学地球科学与工程学院,南京210093 [2]江苏煤炭地质物测队,南京210046

出　　处：《沉积学报》2011年第4期644-657,共14页Acta Sedimentologica Sinica

基　　金：国家自然科学基金项目(批准号:40972132;40634022);内生金属矿床成矿机制研究国家重点实验室项目(编号:2008-7-01)资助

摘　　要：金衢盆地是中国东南部晚中生代断陷盆地之一,发育在前中生代变质褶皱基底之上,主要由北部浅凹陷带、中央隆起带以及南部深凹陷带三个构造单元组成。运用盆地原型分析方法,对盆地的构造事件、深部构造、蚀源区、沉降史、沉积中心、盆地边界构造和沉积间断等进行了研究。盆地经历了早期陆内挤压、早白垩世晚期伸展拉张、晚白垩世拗陷、白垩世末萎缩以及后期改造几个演化阶段。研究认为:盆地沉积物主要来自于早期褶皱隆升的前中生代地层的剥蚀以及晚期拉张背景的山体风化剥蚀,证实了金衢盆地经历过由挤压向拉张机制转换所致抬升剥蚀事件,这些事件对断陷箕状盆地的形成起了很大作用;盆地沉积沉降中心主要在衢州附近,而在不同的古岩相期又有一定位移的迁移。研究表明,盆地具有良好的含油气前景,钱家、水亭、杨塘和蒋塘4个构造圈闭具有较大的勘探潜力。South China is one of the most complex area with continental reconstruction.Under the evolution background of tectonic regime and heat system,different basin types had been shaped with the distinguishing feature of identical phase prototype basins coming to being combined and distinct phase archetype basins being superposed.Generally,South China has two stage prototypes of marine facies original mold from Palaeozoic Era to Early Indosinian and Meso-cenzoic terrestrial facies antetype;the former being labeled by fluctuating sea level,being accompanied by ingression and regression of the sea,being presented by relatively integral cyclic depositional series,and shaping the marine facies prototype basin,and the latter undergoing relatively frequent tectonic events,having multiphase tectonic reworking on marine facies prototype basins and overlapping above last term prototype,creating varied conditions of bearing,storing,and capping.For Jinhua-Quzhou basin is typical representation of Meso-cenozoic land facies prototype basins,being situated in kernel place of South China,by studying its key elements of prototype and recognizing entirety through part,theoretical references can be provided for researching tectonic setting evolution history and filling history of Southeast China and even the whole South China,guiding denotation on the aspect of oil and gas exploration activity. Jinhua-Quzhou Basin is one of the late Mesozoic rifted basins in Southeast China.It developed on the Pre-mesozoic metamorphosed fold basement,mainly including three structural units of northern shallow depression zone,central uplift belt and southern hollow zone.Making use of analytic approach of basin prototype,tectonic events,deep seated structure,provenance,subsiding history,depocenter,basin boundary structure and cessation of deposition,and so on,were studied.J-Q basin had undergone several evolutionary phases of early intracontinental compressing,late early Crataceous extending and drafting,late Crataceous depression,suppression of last stag

关 键 词：金衢盆地 原型分析 沉降中心 构造环境 油气 

分 类 号：TE121.1[石油与天然气工程—油气勘探]