焉耆盆地北缘和静逆断裂-褶皱带古地震破裂方式和时间序列

doi:10.3969/j.issn.0253-4967.2015.03.001

地震地质 ›› 2015, Vol. 37 ›› Issue (3): 661-674.DOI: 10.3969/j.issn.0253-4967.2015.03.001

焉耆盆地北缘和静逆断裂-褶皱带古地震破裂方式和时间序列

李安^1,2, 杨晓平², 伊力亚尔³

1 中国地震局地壳应力研究所, 地壳动力学重点实验室, 北京 100085;
2 中国地震局地质研究所, 活动构造与火山重点实验室, 北京 100029;
3 新疆维吾尔自治区地震局, 新疆防御自然灾害研究所, 乌鲁木齐 830011

收稿日期:2014-03-09 修回日期:2015-06-03 出版日期:2015-09-20 发布日期:2015-10-20
通讯作者: 杨晓平,男,研究员,E-mail:yangxiaoping-1@163.com
作者简介:李安,男,1983年生,2013年于中国地震局地质研究所获构造地质学博士学位,助理研究员,主要研究方向为活动构造,电话:010-62846731,E-mail:antares_lee@163.com.
基金资助:
中国地震局地壳应力研究所基本科研业务专项(ZDJ2014-12)、地震行业专项编制活断层探察相关标准研究(201308001)和全国地震监视防御区活动断层地震危险性评价项目(1521044025)共同资助.

THE RUPTURE MODEL AND TIME SERIES OF PALEOEARTHQUAKES OF THE HEJING THRUST FAULT-FOLD BELT IN THE NORTH MARGIN OF THE YANQI BASIN

LI An^1,2, YANG Xiao-ping², Yiliyaer³

1 Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China;
2 Key Laboratory of Active Tectonics and Volcano, Institute of Geology, China Earthquake Administration, Beijing 100029, China;
3 Institute of Natural Disaster Prevention of Xinjiang, Earthquake Administration of Xinjiang Uygur Autonomous Region, Urumqi 830011, China

Received:2014-03-09 Revised:2015-06-03 Online:2015-09-20 Published:2015-10-20

摘要/Abstract

摘要：

古地震研究是构造地质基础研究工作之一, 获得较为精细的古地震结果有利于提高对断层构造变形的样式、强度以及时间的认识.焉耆盆地是南天山东段的山间盆地, 现今的构造应力场特征以挤压兼有走滑为主.盆地南北缘断裂均为全新世活动断裂, 南缘开都河断裂以走滑运动为主.盆地北缘断裂向盆内扩展的新生和静逆断裂-褶皱带以逆冲运动为主, 且具备发生7级以上大地震的能力.因此, 对于焉耆盆地北缘和静逆断裂-褶皱带的古地震破裂方式和发生时间的研究具有重要意义.调查发现, 其中的哈尔莫敦背斜南翼主逆断裂以30°左右向盆内逆冲, 在河漫滩和T₁阶地上形成了3排断层陡坎.在3条断层陡坎上开挖的5个探槽中, 通过标志地层建立的时间序列可以确定6次古地震事件的先后关系.利用 ¹⁴C和光释光(OSL)测年手段获得了探槽中相关地层和坎前堆积物的沉积时代, 利用逐次限定法得到了各次古地震事件的发生时间和全新世以来2ka左右的古地震复发间隔.结果显示F₁断层在所有的古地震事件中都发生了破裂, F₂断层只在事件E时产生了破裂, F₃断层只在事件D和事件E中发生过破裂.从古地震事件上分析, 事件D是一次3条断层同时破裂的事件, 事件E是一次F₁和F₃ 2条断层同时破裂的事件, 其他事件都只在F₁断层上破裂.和静逆断裂的古地震破裂同时存在必然性和不确定性.

关键词: 古地震, 和静逆断裂-褶皱带, 焉耆盆地, 天山

Abstract:

Paleoearthquake study is a basic research that can be favorable for the understanding of deformation pattern, intensity and time scale of the fault structure. The Yanqi Basin is an intermountain basin located in the eastern part of southern Tianshan Mountains. The present-day tectonic stress field of the basin is dominated by compression with strike-slip component. Both the north and the south marginal faults are Holocene active faults. The Kaiduhe Fault on the southern margin is a strike-slip fault. The Hejing Fault on the northern margin is a neogenic thrust-fold belt dominated by thrust faulting and extending towards the basin. The Hejing thrust fault has the potential to generate M7 earthquake in the future. Therefore, it is important to study the rupture model and time series of paleoearthquakes of the Hejing thrust fault-fold belt. According to the surveys, the major thrust fault at the south limb of the Haermodun anticline thrusts inwards the basin, with a dip angle of 30°, producing three paleoseismic scarps in T₁ terrace and washland. We determine the time series of six paleoseismic events by the cut-cover relationship of marker stratums in five trenches, date the age of stratums and colluvial wedges by ¹⁴C and OSL dating method, and obtain the recurrence intervals of the paleoseismic events using progressive constraining method. The rupture models of the Hejing fault are summarized. The fault F₁ ruptured in every paleo seismic event, but fault F₂ only ruptured in event E, F₃ only ruptured in event D and E. In other words, Event D ruptured the three faults simultaneously, Event E ruptured two faults, and the other events only ruptured fault F₁. There exist both certainty and uncertainty in the rupturing of Hejing thrust fault in the paleo-earthquakes.

Key words: paleoearthquake, Hejing thrust fault-fold belt, Yanqi Basin, Tianshan

中图分类号:

P315.2

李安, 杨晓平, 伊力亚尔. 焉耆盆地北缘和静逆断裂-褶皱带古地震破裂方式和时间序列[J]. 地震地质, 2015, 37(3): 661-674.

LI An, YANG Xiao-ping, Yiliyaer. THE RUPTURE MODEL AND TIME SERIES OF PALEOEARTHQUAKES OF THE HEJING THRUST FAULT-FOLD BELT IN THE NORTH MARGIN OF THE YANQI BASIN[J]. SEISMOLOGY AND GEOLOGY, 2015, 37(3): 661-674.

参考文献

邓起东, 冯先岳, 张培震, 等. 1999. 乌鲁木齐山前坳陷逆断裂-褶皱带及其形成机制［J］. 地学前缘, 6(4): 191—201.
DENG Qi-dong, FENG Xian-yue, ZHANG Pei-zhen, et al. 1999. Reverse fault and fold zone in the Urumqi range front depression of the northern Tianshan and its genetic mechanism［J］. Earth Science Frontier, 6(4): 191—201(in Chinese).
邓起东, 冯先岳, 张培震, 等. 2000. 天山活动构造［M］. 北京: 地震出版社.
DENG Qi-dong, FENG Xian-yue, ZHANG Pei-zhen, et al. 2000. Active Tectonics in Tianshan［M］. Seismological Press, Beijing(in Chinese).
郭建明, 傅碧宏, 林爱明, 等. 2003. 焉耆盆地活动构造的遥感图像特征［J］. 地震地质, 25(2): 195—202.
GUO Jian-ming, FU Bi-hong, LIN Ai-ming, et al. 2003. Characteristics of the remote sensing images of active tectonics in Yanqi Basin［J］. Seismology and Geology, 25(2): 195—202(in Chinese).
黄伟亮, 杨晓平, 李安, 等. 2011. 和静逆断裂-褶皱带的晚新生代构造地貌与侧向扩展［J］. 地震地质, 33(4): 765—776. doi: 10.3969/j.issn.0253-4967.2011.04.003.
HUANG Wei-liang, YANG Xiao-ping, LI An, et al., 2011. Morphotectonic evidence from lateral propagation of Hejing reverse fault-fold zone during the late Quaternary［J］. Seismology and Geology, 33(4): 765—776(in Chinese).
李安, 杨晓平, 黄伟亮, 等. 2011. 焉耆盆地北缘哈尔莫敦背斜区的活动断裂及其形成机制［J］. 地震地质, 33(4): 789—803. doi: 10.3969/j.issn.0253-4967.2011.04.
LI An, YANG Xiao-ping, HUANG Wei-liang, et al., 2011. Active faults of the Haermodun anticline and their formation mechanism in the north margin of the Yanqi Basin［J］. Seismology and Geology, 33(4): 789—803(in Chinese).
李安, 杨晓平, 黄伟亮, 等. 2012. 焉耆盆地北缘和静逆断裂-褶皱带第四纪变形［J］. 地震地质, 34(2): 240—253. doi: 10.3969/j.issn.0253-4967.2012.02.004.
LI An, YANG Xiao-ping, HUANG Wei-liang, et al. 2012. Quaternary deformation of the Hejing thrust-fold belt on northern margin of the Yanqi Basin, Southern Tianshan［J］. Seismology and Geology, 34(2): 240—253(in Chinese).
林爱明, 傅碧宏, 守野谦一, 等. 2003. 焉耆盆地活动断层的晚第四纪右行走滑［J］. 新疆地质, 21(1): 103—115.
LIN Ai-ming, FU Bi-hong, Keni-ichi Kano, et al. 2003. Late Quaternary dextral shearing of the active fault in Yanqi Basin［J］. Xinjiang Geology, 21(1): 103—115(in Chinese).
王敏, 沈正康, 牛之俊, 等. 2003. 现今中国大陆地壳运动与活动块体模型［J］. 中国科学(D辑), 33(S1): 21—32.
WANG Min, SHEN Zheng-kang, NIU Zhi-jun, et al. 2003. Present-day crustal movement of Chinese mainland and active block model［J］. Science in China(Ser D), 33(S1): 21—32(in Chinese).
王琪, 丁国瑜, 乔学军, 等. 2000. 用GPS研究南天山(伽师)地区现今地壳变形［J］. 地震学报, 22(3): 263—271.
WANG Qi, DING Guo-yu, QIAO Xue-jun, et al. 2000. Research on present crustal deformation in the southern Tianshan(Jiashi), China by GPS geodesy［J］. Acta Seismologica Sinica, 22(3): 263—271(in Chinese).
王晓强, 李杰, 王琪, 等. 2005. 天山现今地壳运动的形变场分析［J］. 大地测量与地球动力学, 25(3): 63—68.
WANG Xiao-qiang, LI Jie, WANG Qi, et al. 2005. Analysis of present-day crustal deformation of Tianshan［J］. Journal of Geodesy and Geodynamics, 25(3): 63—68(in Chinese).
杨晓平, 邓起东, 张培震, 等. 2008. 天山山前主要推覆构造区的地壳缩短［J］. 地震地质, 30(1): 111—131.
YANG Xiao-ping, DENG Qi-dong, ZHANG Pei-zhen, et al. 2008. Crustal shortening of major nappe structures on the front margins of the Tianshan［J］. Seismology and Geology, 30(1): 111—131(in Chinese).
中国地震简目编辑组. 2000. 中国地震简目公元前780—公元1986年［M］. 北京: 地震出版社.
China Earthquake Directory Editing Group. 2000. China Earthquake Directory from 780 BC to 1986 AD［M］. Seismological Press, Beijing(in Chinese).
Avouac J P, Tapponnier P T, Bai M, et al. 1993. Active thrusting and folding along the northern Tienshan, and Late Cenozoic rotation of the Tarim relative to Dzhungaria and Kazakhstan［J］. J Geophy Res, 98: 6755—6840.
Huang W L, Yang X P, Li A et al. 2014. Climatically controlled formation of river terraces in a tectonically active region along the southern piedmont of the Tian Shan, NW China［J］. Geomorphology, 220: 15—29.
Molnar P, Tapponnier P. 1975. Cenozoic tectonics of Asia: Effects of a continental collision［J］. Sciences, 189: 419—429.
Molnar P, Tapponnier P. 1978. Active tectonics of Tibet［J］. J Geophy Res, 83: 5361—5374.
Molnar P, Lyon-Caen H. 1989. Fault plane solution of earthquakes and active tectonics of the Tibetan plateau and its margins［J］. Geophy J Int, 99: 123—153.
Philip H, Meghraoui M. 1983. Deformations of El Asnam earthquake［J］. Tectonics, 2(1): 17—49.
Royden L H. 2008. The geological evolution of the Tibetan plateau［J］. Science, 321: 1054.
Tapponnier P, Molnar P. 1977. Active faulting and Cenozoic tectonics of China［J］. J Geophy Res, 82: 2905—2930.
Tapponnier P, Molnar P. 1978. Active Faulting and Cenozoic tectonics of Tianshan, Mongolia and Baykal regions［J］. J Geophy Res, 84: 3425—3459.

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焉耆盆地北缘和静逆断裂-褶皱带古地震破裂方式和时间序列

THE RUPTURE MODEL AND TIME SERIES OF PALEOEARTHQUAKES OF THE HEJING THRUST FAULT-FOLD BELT IN THE NORTH MARGIN OF THE YANQI BASIN

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