新疆南天山库车坳陷区东秋里塔格断褶带构造特征及新活动性
|
摘要
库车坳陷是南天山中段新构造运动异常强烈的地区,内部发育有四排近EW向展布的逆断裂-背斜带,由南天山山前向塔里木方向依次为:山麓逆断裂-背斜带;喀桑托开逆断裂-背斜带;秋里塔格逆断裂-背斜带和亚肯盲逆断裂-背斜带.东秋里塔格背斜属秋里塔格逆断裂-背斜带东段部分,其构造运动尤为强烈.研究表明:东秋里塔格背斜是浅部滑脱面与其南翼逆冲断层共同形成的断层传播-滑脱混生褶皱,背斜南翼的浅层逆冲断层和深层的断坡构造是重要孕震场所.东秋里塔格浅部背斜核部的背冲式断裂和北翼的膝折属于派生的次级构造,断裂的规模、错动量有限.东秋里塔格背斜南翼逆断层最新活动错断Ⅱ级阶地砾石层,其活动年代至少为全新世早期,这次错动在地表留有3~4km长的古地震破裂形迹,说明断裂具粘滑运动特征.
The Kuqa depression is located in the middle segment of the southern Tianshan Mountains.There are four E-W extending rows of reverse fault and anticline zones in the depression. From the south Tianshan Mountains towards the Tarim basin, they are the mountain piedmont, the Kasangtuokai, the Qiulitag and the Yaken reverse fault and fold zones. The most recent active fold in this system is the Qiulitag fold belt. Dongqiulitag anticlinal zone belongs to east segment of Qiulitag reverse fault and fold zone. Comparing with other tectonic belts, new tectonic movement of the east segment is very strong. Research shows that dongqiulitag anticlinal is fault propagation-detachment mixed-fold, which results from effect of shallow detachment surface and reverse fault locating south of Dongqiulitag anticlinal. In the south of Dongqiulitag anticlinal, shallow reverse fault and deep ramp structure are important seismogenic locus. Back thrusting fault of shallow anticlinal core and kinking of the north wing of Dongqiulitag anticline belong to derivative secondary-structure. Size of the rupture and disturbance is finite. Latest activity of reverse fault, which locates south wing of the Dongqiulitag anticline, dislocated II terrace gravel layer. Activity date of the reverse fault is not less than earlier Holocene Epoch. The disturbance leaves paleoearthquake fractured trace behind in the ground surface, which is 3-4 kilometre. It shows that the rupture features of stick-slip movement.
The Kuqa depression is located in the middle segment of the southern Tianshan Mountains.There are four E-W extending rows of reverse fault and anticline zones in the depression. From the south Tianshan Mountains towards the Tarim basin, they are the mountain piedmont, the Kasangtuokai, the Qiulitag and the Yaken reverse fault and fold zones. The most recent active fold in this system is the Qiulitag fold belt. Dongqiulitag anticlinal zone belongs to east segment of Qiulitag reverse fault and fold zone. Comparing with other tectonic belts, new tectonic movement of the east segment is very strong. Research shows that dongqiulitag anticlinal is fault propagation-detachment mixed-fold, which results from effect of shallow detachment surface and reverse fault locating south of Dongqiulitag anticlinal. In the south of Dongqiulitag anticlinal, shallow reverse fault and deep ramp structure are important seismogenic locus. Back thrusting fault of shallow anticlinal core and kinking of the north wing of Dongqiulitag anticline belong to derivative secondary-structure. Size of the rupture and disturbance is finite. Latest activity of reverse fault, which locates south wing of the Dongqiulitag anticline, dislocated II terrace gravel layer. Activity date of the reverse fault is not less than earlier Holocene Epoch. The disturbance leaves paleoearthquake fractured trace behind in the ground surface, which is 3-4 kilometre. It shows that the rupture features of stick-slip movement.
引文
[1]贾承造.中国塔里木盆地构造特征与油气[M].北京:石油工业出版社,1997.
[2]田作基,宋建国.塔里木库车新生代前陆盆地构造特征及形成演化[J].石油学报,1999,20(4):9-13.
[3]卢华复,贾东,陈楚铭,等.库车新生代构造性质和变形时间[J].地学前缘,1999,6(4):215-221.
[4]陈楚铭,卢华复,贾东,等.塔里木盆地北缘库车再生前陆褶皱逆冲带中秋丘里塔格前锋带的构造和油气[J].地质论评,1999,45(4):423-433.
[5]卢华复,陈楚铭,刘志宏.库车再生前陆逆冲带的构造特征与成因[J].石油学报,2000,21(3):18-24.
[6]邓起东,冯先岳,张培震,等.天山活动构造[M].北京:地震出版社,2000.
[7]汪新,贾承造,杨树锋,等.南天山库车褶皱带构造几何学和运动学[J].地质科学,2002,37(3):372-384.
[8]卢华复,贾承造.库车-柯坪再生前陆冲断带构造[M].北京:科学出版社,2003.
[9]管树巍,陈宁华.库车坳陷秋里塔格褶皱带几何学和运动学特征与油气圈闭.石油学报,2003,24(6):30-34.
[10]何光玉,卢华复.库车盆地秋里塔格构造带构造圈闭及油气勘探方向[J].地质科学,2003,38(4):506-513.
[11]占继军,贾承造,王招明,等.秋里塔格构造带构造分段特征与油气成藏[J].石油勘探与开发,2004,31(6):20-24.
[12]齐英敏,苗继军,马全天,等.新疆库车地区秋里塔格构造带成因分析[J].地质科学,2004,39(4):961-570.
[13]沈军,吴传勇,李军,等.库车坳陷活动构造的基本特征[J].地震地质,2006,28(2):269-278.
[14]吴传勇,沈军,陈建波,等.新疆南天山库车坳陷晚第四纪以来地壳缩短速率的初步研究[J].地震地质,2006,28(2):279-288.
[15]柏美祥.新疆河谷阶地年代[J].内陆地震,1998,12(1):13-19.
[16]新疆地震局.新疆通志第11卷地震志[M].乌鲁木齐:新疆人民出版社,2002.
[2]田作基,宋建国.塔里木库车新生代前陆盆地构造特征及形成演化[J].石油学报,1999,20(4):9-13.
[3]卢华复,贾东,陈楚铭,等.库车新生代构造性质和变形时间[J].地学前缘,1999,6(4):215-221.
[4]陈楚铭,卢华复,贾东,等.塔里木盆地北缘库车再生前陆褶皱逆冲带中秋丘里塔格前锋带的构造和油气[J].地质论评,1999,45(4):423-433.
[5]卢华复,陈楚铭,刘志宏.库车再生前陆逆冲带的构造特征与成因[J].石油学报,2000,21(3):18-24.
[6]邓起东,冯先岳,张培震,等.天山活动构造[M].北京:地震出版社,2000.
[7]汪新,贾承造,杨树锋,等.南天山库车褶皱带构造几何学和运动学[J].地质科学,2002,37(3):372-384.
[8]卢华复,贾承造.库车-柯坪再生前陆冲断带构造[M].北京:科学出版社,2003.
[9]管树巍,陈宁华.库车坳陷秋里塔格褶皱带几何学和运动学特征与油气圈闭.石油学报,2003,24(6):30-34.
[10]何光玉,卢华复.库车盆地秋里塔格构造带构造圈闭及油气勘探方向[J].地质科学,2003,38(4):506-513.
[11]占继军,贾承造,王招明,等.秋里塔格构造带构造分段特征与油气成藏[J].石油勘探与开发,2004,31(6):20-24.
[12]齐英敏,苗继军,马全天,等.新疆库车地区秋里塔格构造带成因分析[J].地质科学,2004,39(4):961-570.
[13]沈军,吴传勇,李军,等.库车坳陷活动构造的基本特征[J].地震地质,2006,28(2):269-278.
[14]吴传勇,沈军,陈建波,等.新疆南天山库车坳陷晚第四纪以来地壳缩短速率的初步研究[J].地震地质,2006,28(2):279-288.
[15]柏美祥.新疆河谷阶地年代[J].内陆地震,1998,12(1):13-19.
[16]新疆地震局.新疆通志第11卷地震志[M].乌鲁木齐:新疆人民出版社,2002.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心