全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

中国大陆与各活动地块、南北地震带实测应力特征分析

DOI: 10.6038/j.issn.0001-5733.2012.12.032, PP. 4207-4217

Keywords: 中国大陆,地应力测量,回归分析,活动地块,地震带

Full-Text   Cite this paper   Add to My Lib

Abstract:

本文以"中国大陆地壳应力环境基础数据库"为基础,补充了迄今为止查阅到的中国大陆水压致裂法与应力解除法的实测地应力数据,在1474个测点上得到3586条数据,研究区经度范围75°E-130°E,纬度范围18°N-47°N,深度范围0~4000m,基本覆盖了中国大陆的各活动地块与南北地震带各段等研究区.本文采用等深度段分组归纳的方法解决了实测地应力数据样本数量沿深度分布的不均匀问题,给出了中国大陆与各研究区地壳浅层测量深度范围内应力量值、方位特征.结果显示:(1)中国大陆地壳浅层最大水平应力、最小水平应力、垂直应力随深度呈线性增加;(2)中国大陆地区侧压系数随深度的变化特征为:浅部离散,随着深度增加而集中,并趋向0.68,D=465m是水平作用为主导向垂直作用为主导的转换深度,Kav=1;(3)中国大陆水平差应力在地表为3MPa左右,随深度增加以5.8MPa/km的梯度增大;(4)在测量深度范围内,中国大陆各研究区最大水平应力中间值(深度为2000m时的统计回归值)从大到小的顺序是:青藏地块63.6MPa、南北带北段57.3MPa、华南地块51.4MPa、华北地块50.5MPa、南北带中段47.9MPa、西域地块47.5MPa、南北带南段45.4MPa、东北地块44.8MPa,总体表现为"西强东弱"的基本特征,反映了印度板块与欧亚板块的强烈碰撞是中国大陆构造应力场强度总体特征的主要来源;(5)与其他研究区相比较,青藏地块地壳在从南向北的挤压作用下呈现出明显的"浅弱深强"特点;(6)最大水平应力方向的总体特征,基本以青藏高原为中心,呈辐射状展布,由西向东,从近N-S方向逐步顺时针旋转至NNE-SSW、NE-SW、NEE-SWW、NW-SE方向,与深部的震源机制解研究结果有一致性.

References

[1]  谢富仁, 陈群策, 崔效锋等. 中国大陆地壳应力环境研究. 北京: 地质出版社, 2003. Xie F R, Chen Q C, Cui X F, et al. Research on Crustal Stress State in China and Adjacent Area. Beijing: Geological Publish House, 2003.
[2]  张培震, 邓起东, 张国民等. 中国大陆的强震活动与活动地块. 中国科学(D辑), 2003, 33(增): 12-20. Zhang P Z, Deng Q D, Zhang G M, et al. Active tectonic blocks and strong earthquakes in the continent of China. Science in China (Series D), 2003, 46(Suppl.): 13-24.
[3]  阚荣举, 张四昌, 晏凤桐等. 我国西南地区现代构造应力场与现代构造活动特征的探讨. 地球物理学报, 1977, 20(2): 96-108. Kan R J, Zhang S C, Yan F T, et al. Present tectonic stress field and its relation to the characteristics of recent tectonic activity in Southwestern China. Acta Geophysica Sinica (Chinese J. Geophys.) (in Chinese), 1977, 20(2): 96-108.
[4]  王连捷, 吴珍汉, 王薇等. 青藏高原中段现今构造应力场的数值模拟. 地质力学学报, 2006, 12(2): 140-149. Wang L J, Wu Z H, Wang W, et al. Numerical modeling of the present tectonic stress field in the central Qinghai-Tibet plateau. Journal of Geomechanics (in Chinese), 2006, 12(2): 140-149.
[5]  张春山, 吴满路, 廖椿庭等. 青海格尔木—五道梁地区现今地应力测量结果及其构造分析. 地球物理学报, 2005, 26(2): 183-186. Zhang C S, Wu M L, Liao C T, et al. Current stress measurement and structure analysis of Golmud-Wudaoliang region in Qinghai province. Chinese J. Geophys. (in Chinese), 2005, 26(2): 183-186.
[6]  Hast N. The state of stress in the upper part of the Earth''s crust. Tectonophysics, 1969, 8(3): 169-211.
[7]  Worotniki G, Denham D. The state stress in the upper part of the Earth''s crust in Australia according to measurements in tunnels and mines and from seismic observation: Investigation of Stress in Rock-Advances in Stress Measurement, Int. Soc. Rock Mech. Symp. Sydney, Australia: , 1976: 71-82.
[8]  Brown E T, Hoek E. Trends in relationships between measured in-situ stresses and depth. Int. J. Rock Mech. Min. Sci. Geomech. Abstr., 1978, 15(4): 211-215.
[9]  Stacey T R, Wesseloo J. In situ stresses in mining areas in South Africa, JIS. Afr. Inst. Min. Metall., 1998, 98(7): 365-368.
[10]  Zoback M L. First- and second-order patterns of stress in the lithosphere: the world stress map project. J. Geophys. Res., 1992, 97(B8): 11703-11728.
[11]  李方全, 祁英男. 地壳应力随深度的变化规律. 岩石力学与工程学报, 1988, 7(4): 301-309. Li F Q, Qi Y N. Variation of crustal stresses with depth in China. Chinese Journal of Rock Mechanics and Engineering (in Chinese), 1988, 7(4): 301-309.
[12]  蔡美峰. 地应力测量原理和技术. 北京: 科学出版社, 2000. Cai M F. The Principle and Technology of In-Situ Stress Measurement (in Chinese). Beijing: Science Press, 2000.
[13]  朱焕春, 陶振宇. 不同岩石中地应力分布. 地震学报, 1994, 16(1): 49-63. Zhu H C, Tao Z Y. Geostress distributions in different rocks. Acta Seismologica Sinica (in Chinese), 1994, 16(1): 49-63.
[14]  景锋, 盛谦, 张勇慧等. 不同地质成因岩石地应力分布规律的统计分析. 岩土力学, 2008, 29(7): 1877-1883. Jing F, Sheng Q, Zhang Y H, et al. Statistical analysis of geostress distribution laws for different rocks. Rock and Soil Mechanics (in Chinese), 2008, 29(7): 1877-1883.
[15]  朱焕春, 陶振宇. 地形地貌与地应力分布的初步分析. 水利水电技术, 1994, 223(1): 29-34. Zhu H C, Tao Z Y. A preliminary analysis on ground stress and topography morphology. Water Resources and Hydropower Engineering (in Chinese), 1994, 223(1): 29-34.
[16]  赵德安, 陈志敏, 蔡小林等. 中国地应力场分布规律统计分析. 岩石力学与工程学报, 2007, 26(6): 1265-1271. Zhao D A, Chen Z M, Cai X L, et al. Analysis of distribution rule of geostress in China. Chinese Journal of Rock Mechanics and Engineering (in Chinese), 2007, 26(6): 1265-1271.
[17]  石耀霖. 地应力主应力的方位角求和与平均. 地震学报, 2004, 26(1): 106-109. Shi Y L. Summation and decomposition of principal stresses in the crust. Acta Seismologica Sinica (in Chinese), 2004, 26(1): 106-109.
[18]  谢富仁, 崔效锋, 赵建涛等. 中国大陆及邻区现代构造应力场分区. 地球物理学报, 2004, 47(4): 654-662. Xie F R, Cui X F, Zhao J T, et al. Regional division of the recent tectonic stress field in China and adjacent areas. Chinese J. Geophysics. (in Chinese), 2004, 47(4): 654-662.
[19]  景锋, 盛谦, 张勇慧等. 中国大陆浅层地壳实测地应力分布规律研究. 岩土力学与工程学报, 2007, 26(10): 2057-2062. Jing F, Sheng Q, Zhang Y H, et al. Research on distribution rule of shallow crustal geostress in China mainland. Chinese Journal of Rock Mechanics and Engineering (in Chinese), 2007, 26(10): 2057-2062.
[20]  许忠淮, 石耀霖. 岩石圈结构与大陆动力学. 地震学报, 2003, 25(5): 512-527. Xu Z H, Shi Y L. Lithospheric structure and continental geodynamics. Acta Seismologica Sinica (in Chinese), 2003, 25(5): 512-527.
[21]  邓起东, 张裕明, 许桂林等. 中国构造应力场特征及其与板块运动的关系. 地震地质, 1979, 1(1): 11-22. Deng Q D, Zhang Y M, Xu G L, et al. On the tectonic stress field in China and its relation to plate movement. Seismology and Geology (in Chinese), 1979, 1(1): 11-22.
[22]  许忠淮, 汪素云, 黄雨蕊等. 由大量的地震资料推断的我国大陆构造应力场. 地球物理学报, 1989, 32(6): 636-647. Xu Z H, Wang S Y, Huang Y R, et al. The tectonic stress field of Chinese continent deduced from a great number of earthquakes. Chinese J. Geophys. (in Chinese), 1989, 32(6): 636-647.
[23]  邓阳凡, 李守林, 范蔚茗等. 深地震测深揭示的华南地区地壳结构及其动力学意义. 地球物理学报, 2011, 54(10): 2560-2574. Deng Y F, Li S L, Fan W M, et al. Crustal structure beneath South China revealed by deep seismic soundings and its dynamics implications. Chinese J. Geophys. (in Chinese), 2011, 54(10): 2560-2574.
[24]  张辉, 高原, 石玉涛等. 基于地壳介质各向异性分析青藏高原东北缘构造应力特征. 地球物理学报, 2012, 55(1): 95-104. Zang H, Gao Y, Shi Y T, et al. Tectonic stress analysis based on the crustal seismic anisotropy in the northeastern margin of Tibetan plateau. Chinese J. Geophys. (in Chinese), 2012, 55(1): 95-104.
[25]  姜辉, 高祥林. 欧亚东边缘的双向板块汇聚及其对大陆的影响. 地球物理学报, 2012, 55(3): 897-905. Jiang H, Gao X L. Two-directional plate convergence along the east margin of Eurasia and its influence on the continent. Chinese J. Geophys. (in Chinese), 2012, 55(3): 897-905.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133