南天山西段前陆褶皱冲断带平衡剖面分析
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摘要
平衡剖面技术是一种基于几何守恒原理的应用于造山带和盆地结构恢复的方法。本文以挤压环境下形成的南天山西段前陆褶皱冲断带为例,对其典型二维地震剖面进行变形分析和平衡剖面恢复。结果表明,从平面上可将该冲断带划分为多排近似平行、东西走向的背斜带,由南往北依次为喀什、阿图什、托帕-康西维尔和喀拉伯克托尔-温古尔背斜带;从剖面上可以将该冲断带划分为两个不同层次的推覆构造系统:浅层为大规模叠瓦式冲断系统;深层为原地隐伏双重冲断构造系统。对重点剖面进行平衡剖面分析,得出自上新世以来研究区南北构造缩短量为49.1km,缩短率为50.51%,地壳平均缩短速率为13.72mm/a。
The technique of balanced section is based on the geometric conservation principle to restore the structure of orogenic and basin.Took the Western part of the foreland fold-thrust belt in Southern Tien Shan for example,which formed in a compressional tectonic setting,this paper analysed tectonic deformation and the balanced section of the typical 2D seismic profiles in this area. The result shows that the fold-thrust belt can be divided into several rows of anti-clines on plane which are almost parallel and E-W-trending,such as Kashi,Atushi,Tuopa-Kangxiweier and Kaboketuoer-Wenguer from south to north. In profile,it can be divided into two different levels of thrust system:The shallow part is a large scale imbricate thrust system;the deep structure is in-situ buried duplex structure system. Analysed the balanced section of the key profile in this area,concluding that this area is shortened by 49.1 km (from north to south)since Pliocene in shortening ratio of 50.51%,its average crustal shortening rate is 13.72 mm / a.
The technique of balanced section is based on the geometric conservation principle to restore the structure of orogenic and basin.Took the Western part of the foreland fold-thrust belt in Southern Tien Shan for example,which formed in a compressional tectonic setting,this paper analysed tectonic deformation and the balanced section of the typical 2D seismic profiles in this area. The result shows that the fold-thrust belt can be divided into several rows of anti-clines on plane which are almost parallel and E-W-trending,such as Kashi,Atushi,Tuopa-Kangxiweier and Kaboketuoer-Wenguer from south to north. In profile,it can be divided into two different levels of thrust system:The shallow part is a large scale imbricate thrust system;the deep structure is in-situ buried duplex structure system. Analysed the balanced section of the key profile in this area,concluding that this area is shortened by 49.1 km (from north to south)since Pliocene in shortening ratio of 50.51%,its average crustal shortening rate is 13.72 mm / a.
引文
[1]张世华,叶艳鸣,李忠权.平衡剖面研究中的新方法[J].矿物岩石,1998,18:234-235.
[2]刁博,程顺有.提高平衡剖面应用价值的有效方法[J].西北大学学报,2004,2(3):1-8.
[3]伍秀芳.塔里木盆地西南缘前陆褶皱冲断带构造几何学和运动学分析[D],杭州:浙江大学地球科学系,2003.
[4]张向鹏,杨晓薇.平衡剖面技术的研究现状及进展[J],期刊第2007,35(2):78-80.
[5]张明山,陈发景.平衡剖面技术应用的条件及实例分析[J].石油地球物理勘探,1998,33(4):532-540.
[6]Butler R W H.Thrust sequences[J].Journal of Geolog-ical Society.London,1987,144:857-634.
[7]Williams G.The geometry of listric normal faults and de-formation in their hanging wall[J].Journal of Structural Geology.1987:789-795.
[8]Davison I.Listric normal fault profiles:Calculation us-ing bed length balance and fault displacement[J].Journal of Structural Geology.1986,8:209-211.
[9]肖安成,贾承造,杨树锋,等.中国南天山西部冲断褶皱系前缘区的运动学特征[J].沉积学报,2000,18(3):439-444.
[10]肖安成.塔里木盆地西南缘的构造特征与油气聚集规律[J],江汉石油学院学报,1997,19(2):1-6.
[11]Suppe J.Geometry and Kinematics of fault bend fold-ing[J].Amer,Jour.Sci.,1983,283:684-721.
[12]Suppe J,Medwedeff D A.Geometry and Kinematics of fault-propagation folding.Eclog[J].Geol.Helv,1990,83:409-454.
[13]尚新璐,陈新卫,吴超,等.塔里木盆地西部喀什地区的新生代冲断构造[J],地质科学,2004,39(4):543-550.
[14]罗金海,周新源,邱斌,等.塔里木盆地西部喀什凹陷褶皱冲断带的构造特征[J],石油与天然气地质,2004,25(2):199-203
[15]薛崇武.喀什及邻区区域构造体系特征[J],新疆地质,2001,19(1):74-79.
[16]张原庆.塔里木盆地西部喀什凹陷新生代构造特征、演化历史与盆山耦合[D],北京,北京大学地质学系,2001.
[17]钱俊锋,肖安成,程晓敢,等.喀什北缘南天山冲断带构造变形分析,中国矿业大学学报[J],2008,7.
[18]陈杰,卢演俦,丁国瑜.塔里木西缘晚新生代造山过程的记录-磨拉石建造及生长地层和生长不整合[J].第四纪研究,2001,21(6):528-539.
[2]刁博,程顺有.提高平衡剖面应用价值的有效方法[J].西北大学学报,2004,2(3):1-8.
[3]伍秀芳.塔里木盆地西南缘前陆褶皱冲断带构造几何学和运动学分析[D],杭州:浙江大学地球科学系,2003.
[4]张向鹏,杨晓薇.平衡剖面技术的研究现状及进展[J],期刊第2007,35(2):78-80.
[5]张明山,陈发景.平衡剖面技术应用的条件及实例分析[J].石油地球物理勘探,1998,33(4):532-540.
[6]Butler R W H.Thrust sequences[J].Journal of Geolog-ical Society.London,1987,144:857-634.
[7]Williams G.The geometry of listric normal faults and de-formation in their hanging wall[J].Journal of Structural Geology.1987:789-795.
[8]Davison I.Listric normal fault profiles:Calculation us-ing bed length balance and fault displacement[J].Journal of Structural Geology.1986,8:209-211.
[9]肖安成,贾承造,杨树锋,等.中国南天山西部冲断褶皱系前缘区的运动学特征[J].沉积学报,2000,18(3):439-444.
[10]肖安成.塔里木盆地西南缘的构造特征与油气聚集规律[J],江汉石油学院学报,1997,19(2):1-6.
[11]Suppe J.Geometry and Kinematics of fault bend fold-ing[J].Amer,Jour.Sci.,1983,283:684-721.
[12]Suppe J,Medwedeff D A.Geometry and Kinematics of fault-propagation folding.Eclog[J].Geol.Helv,1990,83:409-454.
[13]尚新璐,陈新卫,吴超,等.塔里木盆地西部喀什地区的新生代冲断构造[J],地质科学,2004,39(4):543-550.
[14]罗金海,周新源,邱斌,等.塔里木盆地西部喀什凹陷褶皱冲断带的构造特征[J],石油与天然气地质,2004,25(2):199-203
[15]薛崇武.喀什及邻区区域构造体系特征[J],新疆地质,2001,19(1):74-79.
[16]张原庆.塔里木盆地西部喀什凹陷新生代构造特征、演化历史与盆山耦合[D],北京,北京大学地质学系,2001.
[17]钱俊锋,肖安成,程晓敢,等.喀什北缘南天山冲断带构造变形分析,中国矿业大学学报[J],2008,7.
[18]陈杰,卢演俦,丁国瑜.塔里木西缘晚新生代造山过程的记录-磨拉石建造及生长地层和生长不整合[J].第四纪研究,2001,21(6):528-539.
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