2016 , Vol. 31 >Issue 4: 377 - 390
DOI: https://doi.org/10.11867/j.issn.1001-8166.2016.04.0377.
Active Characteristics and Paleoearthquakes in the West Kalpin Nappe Since the Holocene, SW Tianshan Mountain
First author:Li An (1983- ), male, Changsha City, Hu’nan Province, Research assistant.Research areas include the active tectonic and paleoseismology.E-mail:antares_lee@163.com
Received date: 2016-02-18
Revised date: 2016-03-17
Online published: 2016-04-10
Supported by
Project supported by the Young Scientists Fund of the National Natural Science Foundation of China “The topography of alluvial fans and their geomorphic response of the structure activity of the thrust fault-fold belt” (No.41402185);The Institute of Crustal Dynamics, China Earthquake Administration Research Fund “the Geomorphic response of the structure activity of the Yumen fault belt since the late Quaternary in the north Qilian Mountains ” (No.ZDJ2014-12)
Copyright
the Kalpin nappe is an important multiple thrust system. It is important to study the Cenozoic tectonic of the Tianshan Mountain. Holocene active characteristics and paleoearthquake of the Kalpin nappe can be used to evaluate the neotectonic of this area. In this paper, we accurately measured the fault scarp in the front of three thrust-fold faults and analyzed paleoearthquake events in the trenches of the Kalpin nappe. Using the 10Be exposure age, we obtained those geomorphic surface ages and paleoearthquake times. The result showed that the slip rates of the west Kalpintag fault, aozitag fault and the tuoketag fault were 1.45(+1.68/-0.44) mm/a, 0.81(+0.35/-0.19) mm/a and (0.3±0.05) mm/a, respectively since the Holocene. The slip rate indicated that the increased activity transferred from back-row fault to front-row fault and accorded with the piggy-back propagation model in the Tianshan Mountain. Displacements and recurrence intervals of paleoearthquakes was similar to the slip rate characteristics. It also showed paleoearthquakes in the front row fault were stronger than paleoearthquakes of the back row fault. The strong paleoearthquake which caused the highest surface rupture happened in the Kalpintag fault. The interval of paleoearthquakes was about 4 ka and the displacement of every paleoearthquake was about 3 m in the west Kalpintag fault; the interval of paleoearthquakes was about 2 ka and the displacement of every paleoearthquake was about 1m in the aozitag fault; the tuoketag fault ruptured only one paleoearthquake since 7 ka. The Piqiang tear fault was the tectonic result of different shortening rate between the west Kalpin system and the east Kalpin system. The shortening rate of west Kalpin system was obviously stronger than the east Kalpin system. The huge separation distance was near 20 km between the east and the west back-row fault. Because the slip rate of system transferred to the front-row fault in the piggy-back propagation model, the separation distance (~4 km) between the east and the west front-row fault was increasing.
Key words： Kalpin nappe; Slip rate; Paleoearthquake; Tianshan Mountains.
An Li , Yongkang Ran , Huaguo Liu , Liangxin Xu . Active Characteristics and Paleoearthquakes in the West Kalpin Nappe Since the Holocene, SW Tianshan Mountain[J]. Advances in Earth Science, 2016 , 31(4) : 377 -390 . DOI: 10.11867/j.issn.1001-8166.2016.04.0377.
| [1] | Feng Xianyue.Seismogeological characteristics of the Xinjiang area[J].Seismology and Geology,1985, 7(2):35-44. |
| [1] | [冯先岳. 论新疆地震地质特征[J].地震地质, 1985, 7(2):35-44.] |
| [2] | Avouac J P, Tapponnier P T, Bai M, et al.Active thrusting and folding along the northern Tienshan, and Late Cenozoic rotation of the Tarim relative to Dzhungaria and Kazakhstan[J].Journal of Geophysical Research,1993, 98:6 755-6 840. |
| [3] | Herdrix M S, Dumitru T A, Graham S A.Late Oligocene early Miocene unroofing in the Chinese Tianshan: An early effect of the India Asia collision[J]. Geology,1994, 22:487-490. |
| [4] | Deng Qidong, Feng Xianyue, Zhang Peizhen, et al.Reverse fault and fold zone in the Urumqi rang front depression of the northern Tianshan and its genetic mechanism[J]. Earth Science Frontier,1999,6(4):191-201. |
| [4] | [邓起东,冯先岳,张培震,等.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, 1999,6(4): 191-201.] |
| [5] | Li Yongjun, Yang Gaoxue, Zhang Tianji, et al.Definition of the major fold episode Shanshan movement in Yinning Massif, western Tianshan Mountains, and its geological significance[J]. Advances in Earth Scinece,2009,24(4):420-427. |
| [5] | [李永军, 杨高学,张天继,等. 西天山伊宁地块主褶皱幕鄯善运动的确立及地质意义[J]. 地球科学进展, 2009, 24(4):420-427.] |
| [6] | Thompson C B, Welson R J, Rubin C M, et al.Late Quaternary slip rates across the central Tienshan, Kyrgyzstan, central Asia[J].Journal of Geophysical Research,2002, 107(B9): 2 203. |
| [7] | Yang Xiaoping, Ran Yongkang, Cheng Jianwu, et al.Measurement of terrace deformation and crustal shortening of some renascent fold zones within Kalpin nappe structure[J].Science in China (Series D),2007,50(1):33-42. |
| [8] | Ran Yongkang, Yang Xiaoping, Xu Xiwei, et al.Deformation pattern and shortening rates in the east part of Kalpin thrust system in southwest Tianshan during late Quaternary[J].Seismology and Geology,2006,28(2):179-193. |
| [8] | [冉勇康,杨晓平,徐锡伟, 等. 西南天山柯坪推覆构造东段晚第四纪变形样式与缩短速率[J]. 地震地质,2006, 28(2):179-193.] |
| [9] | Brown E T, Bourlès D L, Burchfiel B C, et al.Estimation of slip rates in the southern Tien Shan using cosmic ray exposure dates of abandoned alluvial fans[J]. Geological Society of American Bulletin,1998,110:337-386. |
| [10] | Yin A, Nie S, Craig P, et al.Late Cenozoic tectonic evolution of the southern Chinese Tian Shan[J].Tectonics,1998, 17(1): 1-27. |
| [11] | Allen M B, Vincent S J, Wheeler P J.Late Cenozoic tectonics of the Kepingtage thrust zone: Interactions of the Tien Shan and Tarim Basin, northwest China[J].Tectonics,1999,18(4):639-654. |
| [12] | Yang S M, Li J, Wang Q.The deformation pattern and fault rate in the Tian-shan Mountains inferred from GPS observations[J]. Sciences in China (Series D),2008, 51(8):1 064-1 080. |
| [13] | Burchfiel B C, Brown E T, Deng Q D, et al.Crustal shortening on the margins of the Tienshan, Xinjiang, China[J]. International Geology Review,1999, 41:665-700. |
| [14] | Yang Xiaoping, Zhou Bengang, Li Jun, et al.Shortening and uplift of the active Yaken anticline, southern Tianshan, China since late Pleistocene[J].Seismology and Geology,2001, 23(4):501-509. |
| [14] | [杨晓平,周本刚,李军,等.新疆南天山亚肯背斜晚更新世以来的隆起和缩短[J]. 地震地质, 2001, 23(4):501-509.] |
| [15] | Wang Xin, Jia Chenzao, Yang Shufeng, et al.Geometry and kinematics of the Kuqa fold-and-thrust belt in the southern Tianshan[J].Chinese Journal of Geology,2002,37(3):372-384. |
| [15] | [汪新,贾承造,杨树锋,等.南天山库车褶皱冲断带构造几何学和运动学[J]. 地质科学, 2002, 37(3):372-384.] |
| [16] | Wang Xin.Geometry and kinematics of complex folds, illustrated with examples from Quilitake anticline of Kuqa and Bapanshuimo anticline of Keping, southern Tianshan[J]. Geological Journal of China Universities,2005, 11(4):568-576. |
| [16] | [汪新. 南天山山前复杂褶皱的构造形态分析:以库车秋里塔克背斜和柯坪八盘水磨背斜为例[J]. 高校地质学报, 2005, 11(4):568-576.] |
| [17] | Yang Xiaoping, Deng Qidong, Zhang Peizhen, et al.Crustal shortening of major nappe structures on the front margins of the Tianshan[J].Seismology and Geology,2008,30(1):111-131. |
| [17] | [杨晓平,邓起东,张培震,等.天山山前主要推覆构造区的地壳缩短[J].地震地质, 2008,30(1):111-131.] |
| [18] | China Earthquake Directory Edited Group. China Earthquake Directory from BC 780 to AD 1986[M]. Beijing: Earthquake Press,2000. |
| [18] | [中国地震简目编辑组.中国地震简目公元前780—公元1986年[M]. 北京: 地震出版社,2000.] |
| [19] | Zhou Hongjian, Wang Dandan, Yuan Yi, et al.New advances in statistics of large-scale natural disasters damage and loss: Explanation of “Statistical System of Large-scale Natural Disasters”[J]. Advances in Earth Science,2015, 30(5):530-538. |
| [19] | [周洪建, 王丹丹, 袁艺, 等. 中国特别重大自然灾害损失统计的最新进展——《特别重大自然灾害损失统计制度》解析[J]. 地球科学进展, 2015, 30(5):530-538.] |
| [20] | Qu Guosheng, Chen Jie, Chen Xinfa, et al.A study on the back-thrusting system at Atushi-Bapanshuimo in Tarim Basin[J].Seismology and Geology,2001, 23(1):1-14. |
| [20] | [曲国胜,陈杰,陈新发,等.阿图什—八盘水磨塔里木盆地反冲构造系统研究[J].地震地质,2001,23(1):1-14.] |
| [21] | Yang Haijun, Li Yuejun, Shi Jun, et al.Tectonic characteristics of the late Cenozoic south Tianshan fold-thrust belt[J].Quaternary Sciences,2010, 30(5):1 030-1 043. |
| [21] | [杨海军,李曰俊,师骏,等.南天山晚新生代褶皱冲断带构造特征[J].第四纪研究, 2010,30(5):1 030-1 043.] |
| [22] | Liu Huaguo.A Study on the Tectonic Deformation of the Kalpin Thrust Tectonic System based on High-resolution Satellite Images[D].Beijing:Institute of Geology, China Earthquake Administration,2011. |
| [22] | [刘华国. 基于高分辨率遥感影像的柯坪推覆构造系的构造变形研究[D]. 北京:中国地震局地质研究所,2011.] |
| [23] | Amos C B, Burbank D W, Read S A.Along-strike growth of the Ostler fault, New Zealand: Consequences for drainage deflection above active thrusts[J].Tectonics,2010, 29(4),doi:10.1029/2009TC002613. |
| [24] | McCalpin. Geological Criteria of Recognition for Individual Paleoseismic Events in Environments[R].USGS Open File Report 87-683, 1987:102-114. |
| [25] | Lal D.Cosmic ray labeling of erosion surfaces in situ nuclide production rates and erosion models[J].Earth and Planetary Science Letters,1991, 104(2/4): 424-439. |
| [26] | Stone J O.Air pressure and cosmogenic isotope production[J].Journal of Geophysical Research,2000, 105(1 310):753-759. |
| [27] | Balco G, Stone J O, Lifton N A, et al.A complete and easily accessible means of calculating surface exposure ages or erosion rates from 10Be and 26Al measurements[J].Quaternary Geochronology,2008, 3(3): 174-195. |
| [28] | Song Fangmin, Min Wei, Han Zhujun, et al.Cenozoic deformation and propagation of the Kalpintag fold nappe[J].Seismology and Geology,2006, 28(2):224-233. |
| [28] | [宋方敏, 闵伟, 韩竹军, 等.柯坪塔格推覆体的新生代变形与扩展[J]. 地震地质, 2006, 28(2):224-233.] |
| [29] | Scharer K M, Burbank D W, Chen J, et al.Detachment folding in the Southwestern Tian Shan-Tarim foreland, China: Shortening estimates and rates[J]. Journal of Structural Geology,2004,26:2 119-2 137. |
| [30] | Li T, Chen J, Thompson J A, et al.Quantification of three-dimensional folding using fluvial terraces: A case study from the Mushi anti-cline, northern margin of the Chinese Pamir[J].Journal of Geophysical Research, Solid Earth,2013, 118:4 628-4 647. |
| [31] | Li T, Chen J, Thompson J A, et al.Hinge-migrated fold-scarp model based on an analysis of bed geometry: A study from the Mingyaole anticline, southern foreland of Chinese Tian Shan[J]. Journal of Geophysical Research, Solid Earth,2015, 120:6 592-6 613. |
| [32] | Saint-Carlier D, Charreau J, Lavé J, et al.Major temporal variations in shortening rate absorbed along a large active fold of the southeastern Tianshan piedmont (China)[J]. Earth and Planetary Science Letters,2016, 434:333-348. |
| [33] | Zhao Ruibin, Lu Jingfang, Yang Zhuen, et al.Two-dimentional finite element imitating of Tianshan Tectonic deformation[J].Xinjiang Geology, 2003, 21(2):151-156. |
| [33] | [赵瑞斌,卢静芳,杨主恩,等. 天山构造带新生代构造变形二维有限元模拟[J]. 新疆地质,2003,21(2):151-156.] |
| [34] | Li An, Ran Yongkang, Xu Liangxin, et al.Apreliminary study on the law of recurrence of paleoearthquakes in the eastern Kalpin nappe system, southwestern Tianshan, China[J].Seismology and Geology, 2011, 33(4):752-764. |
| [34] | [李安,冉勇康,徐良鑫,等,西南天山东柯坪推覆系古地震初步研究[J]. 地震地质,2011, 33(4):752-764.] |
| [35] | Li A, Ran Y K, Xu L X, et al.Paleoseismic study of the east Kalpintage fault in southwest Tianshan based on deformation of alluvial fans and 10Be dating[J]. Natural Hazards,2013, 68:1 075-1 087. |
| [36] | Chen Hanlin, Chen Shenqiang, Lin Xiubin.Areview of the Cenozoic Tectonic evolution of Pamir syntax[J].Advances in Earth Science,2014, 29(8):890-902. |
| [36] | [陈汉林, 陈沈强, 林秀斌. 帕米尔弧形构造带新生代构造演化研究进展[J]. 地球科学进展, 2014, 29(8): 890-902.] |
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