High-Resolution Characteristics of Recent Crustal Movement in Qinghai-Tibet Plateau
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摘要: 利用GPS资料, 采用最小二乘配置和小波技术分析了青藏高原的地壳运动特征, 对该区地壳运动强度和涡旋运动进行了定量分析.结果显示, 青藏高原地壳运动强度沿喀喇昆仑断裂、玛尼-玉树-鲜水河-小江的弧型构造带, 自西向东递减.川滇菱形块体显示出北强南弱、西强东弱的特点, 东边界形成明显的分界线, 而西边界并不明显; 青藏高原存在3个涡旋分区: 顺时针旋转的拉萨、羌塘及川滇中西部地区, 亚东-谷露断裂以东的区域为其涡旋高值区; 逆时针旋转的柴达木地块及其以北的地区, 西昆仑断裂与阿尔金断裂之间为其高值区; 逆时针旋转的青藏高原与华南地块的边界带, 龙门山与安宁河的拐角处为其高值区.Abstract: Characteristics of current crustal movement in Qinghai-Tibet Plateau were analyzed with least square collusion and wavelet using GPS data, and crustal movement strength and vortex movement were analyzed quantitatively.The conclusions are drawn as follows: The crustal movement strength in Qinghai-Tibet Plateau decreases from west to east along arc tectonic ruptures formed by Kala-Kunlun, Mani, Yushu, Xianshuihe and Xiaojiang faults.The crustal movement strengths in north and west are stronger than those of south and east in the Sichuan-Yunnan block, of which east boundaries are obvious, and west boundaries are not.There are three vortex zones in Qinghai-Tibet Plateau.Firstly, Lhasa, Qiangtang, and mid-west of Sichuan-Yunnan region clockwisely rotate, and areas to east of Yadong-Gulu are high-value areas.Secondly, Qaidam block and that to its north counterclockwisely rotate, and high-value areas are between West Kunlun and Altun.Thirdly, the boundaries of Qinghai-Tibet Plateau and southern China block counterclockwisely rotate, and high-value areas are in the corner of Longmenshan and Anninghe.
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Key words:
- crustal movement /
- vortex movement /
- Qinghai-Tibet Plateau /
- GPS
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图 1 欧亚基准下的中国大陆速度场(1999-2004年)
Fig. 1. Velocity field of Mainland China on European and Asian benchmark (1999-2004)
图 2 青藏高原水平位移速度信号的经验协方差函数
Fig. 2. Experience covariance functions of horizontal displacement velocity signal in Qinghai-Tibet Plateau
图 3 青藏高原多分辨率地壳运动强度
Fig. 3. Multi-revolution crustal movement strength of Qinghai-Tibet Plateau
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[1] Chen, Z.L., Liu, Y.P., Tang, W.Q., et al., 2006. Recent deformation and displacement of continental lithosphere in the northeastern margin of Qinghai-Tibet Plateau. Geological Bulletin of China, 25(1): 20-28(in Chinese with English abstract). [2] Ei-Fiky, G.S., Kato, T., Oware, E.N., 1999. Crustal deformation and interpolate coupling in the Shikoku district, Japan, as seen from continuous GPS observation. Tectonophysics, 314(4): 387-399. doi: 10.1016/S0040-1951(99)00226-7 [3] Fujii, Y., Xia, S., 1993. Estimation of distribution of the rates of vertical crustal movements in the Tokai district with the aid of least squares prediction. J. Phys. Earth, 41: 239-256. doi: 10.4294/jpe1952.41.239 [4] Gu, G.H., Niu, H.Y., Zheng, G.M., et al., 2000. Crustal movement in China mainland observed from 1998 to 1999. Acta Seismologica Sinica, 22(6): 561-567(in Chinese with English abstract). doi: 10.1007/s11589-000-0061-4 [5] Jiang, Z.S., Zhang, X., Chen, B., et al., 2000. Characteristics of recent horizontal movement and strain-stress field in the crust of North China. Chinese J. of Geophys. , 43(5): 657-665(in Chinese with English abstract). doi: 10.1016/S0009-2541(00)00223-0 [6] Jiang, Z.S., Zhang, X., Cui, D.X., et al., 2001. Recent horizontal movement and deformation in the northeast margin of Qinghai-Tibet block. Chinese J. of Geophys. , 44(5): 636-644(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DQWX200105006.htm [7] Kato, T., Ei-Fiky, G.S., Oware, E.N., 1998. Crustal strains in the Japanese islands as deduced from dense GPS array. Geophys. Res. Lett. , 25(18): 3445-3448. doi: 10.1029/98GL02693 [8] Li, Y.X., Li, Z., Zhang, J.H., et al., 2004. Horizontal strain field in the Chinese mainland and its surrounding areas. Chinese J. of Geophysi. , 47(2): 222-231(in Chinese with English abstract). doi: 10.1002/cjg2.480 [9] Lü, J.N., Shen, Z.K., Wang, M., 2003. Contemporary crustal deformation and active tectonic block model of the Sichuan-Yunnan region. China Seismology and Geology, 25(4): 533-554(in Chinese with English abstract). [10] Ma, Z.J., Chen, X.L., Ye, S.H., et al., 2001. GPS study of current crustal movement of China mainland. Chinese Science Bulletin, 46(13): 1118-1120(in Chinese with English abstract). doi: 10.1360/csb2001-46-13-1118 [11] Moritz, H., 1963. Interpolation and predication of point gravity anomalies. Annals Academiace Scientiarum Fennicae, 69(Ⅲ A): 1-32. [12] Savage, J.C., Gan, W.J., Svarc, J.L., 2001. Strain accumulation and rotation in the eastern California shear zone. J.G.R. , 106(B10): 21995-22007. doi: 10.1029/2000JB000127 [13] Shen, Z.K., Zhao, C.K., An, Y., et al., 2000. Contemporary crustal deformation in East Asia constrained by global positioning system measurements. J.G.R. , 105: 5721-5734. doi: 10.1029/1999JB900391 [14] Tang, W.Q., Chen, Z.L., Liu, Y.P., et al., 2005. Present-day tectonics activity in the intersection area of the Xianshuihe fault and Longmenshan fault on the eastern margin of the Qinghai-Tibet Plateau. Geological Bulletin of China, 24(12): 1169-1172(in Chinese with English abstract). [15] Wang, M., Shen, Z.K., Niu, Z.J., et al., 2003. Present-day crustal movement of Chinese mainland and active block model. Science in China(Ser. D), 33(Suppl. ): 21-32(in Chinese). doi: 10.1360%2F02yd9085 [16] Yang, G.H., Jiang, Z.S., Wu, Y.Q., et al., 2005. No-netrotation on crustal movement of China mainland and its application. Journal of Geodesy and Geodynamics, 25(4): 6-10(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-DKXB200504001.htm [17] Zhang, C.Y., Ding, J., Chao, D.B., 2007. General expression of least squares collocation in local gravity field. Geomatics and Information Science of Wuhan University, 32(5): 431-434(in Chinese with English abstract). doi: 10.1631/jzus.2007.B0900 [18] Zhang, G.M., Zhang, P.Z., 2000. Academic progress on the mechanism and forecast for continental strong earthquake in the first two years. China Basic Science, (10): 4-10(in Chinese with English abstract). http://en.cnki.com.cn/Article_en/CJFDTOTAL-ZGJB200010000.htm [19] Zhang, P.Z., Wang, Q., Ma, Z.J., 2002. GPS velocity field and active crustal deformation in and around the Qinghai-Tibet plateau. Earth Science Frontiers, 9(2): 442-450(in Chinese with English abstract). [20] 陈智梁, 刘宇平, 唐文清, 等, 2006. 青藏高原东北缘大陆岩石圈现今变形和位移. 地质通报, 25(1): 20-28. doi: 10.3969/j.issn.1671-2552.2006.01.005 [21] 顾国华, 牛红叶, 郑贵明, 等, 2000. 中国大陆1998-1999年地壳运动观测结果. 地震学报, 22(6): 561-567. doi: 10.3321/j.issn:0253-3782.2000.06.001 [22] 江在森, 张希, 陈兵, 等, 2000. 华北地区近期地壳水平运动与应力应变场特征. 地球物理学报, 43(5): 657-665. doi: 10.3321/j.issn:0001-5733.2000.05.009 [23] 江在森, 张希, 崔笃信, 等, 2001. 青藏块体东北缘近期水平运动与变形. 地球物理学报, 44(5): 636-644. doi: 10.3321/j.issn:0001-5733.2001.05.007 [24] 李延兴, 李智, 张静华, 等, 2004. 中国大陆及周边地区的水平应变场. 地球物理学报, 47(2): 222-231. doi: 10.3321/j.issn:0001-5733.2004.02.008 [25] 吕江宁, 沈正康, 王敏, 2003. 川滇地区现代地壳运动速度场和活动地块运动模型研究. 地震地质, 25(4): 533-554. https://www.cnki.com.cn/Article/CJFDTOTAL-DZDZ200304002.htm [26] 马宗晋, 陈鑫连, 叶叔华, 等, 2001. 中国大陆区现今地壳运动的GPS研究. 科学通报, 46(13): 1118-1120. doi: 10.3321/j.issn:0023-074X.2001.13.015 [27] 唐文清, 陈智梁, 刘宇平, 等, 2005. 青藏高原东缘鲜水河断裂与龙门山断裂交会区现今的构造活动. 地质通报, 24(12): 1169-1172. doi: 10.3969/j.issn.1671-2552.2005.12.013 [28] 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. 中国科学(D辑), 33(增刊): 21-32. https://www.cnki.com.cn/Article/CJFDTOTAL-JDXK2003S1002.htm [29] 杨国华, 江在森, 武艳强, 等, 2005. 中国大陆整体无净旋转基准及其应用. 大地测量与地球动力学, 25(4): 6-10. doi: 10.3969/j.issn.1671-5942.2005.04.002 [30] 章传银, 丁剑, 晁定波, 2007. 局部重力场最小二乘配置通用表示技术. 武汉大学学报(信息科学版), 32(5): 431-434. https://www.cnki.com.cn/Article/CJFDTOTAL-WHCH200705015.htm [31] 张国民, 张培震, 2000. "大陆强震机理与预测"中期学术进展. 中国基础科学, (10): 4-10. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGJB200010000.htm [32] 张培震, 王琪, 马宗晋, 2002. 青藏高原现今构造变形特征与GPS速度场. 地学前缘, 9(2): 442-450. doi: 10.3321/j.issn:1005-2321.2002.02.023 -
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