中国大陆地壳的应变应力场研究
STUDY ON CRUSTAL STRAIN AND STRESS FIELDS IN CHINA CONTINENT
-
摘要: 根据全国GPS网1 994年和1 996年两期测量结果,研究了中国大陆地壳现阶段的水平形变应力场。结果显示,西部青藏块体与新疆块体主压应力场为近南北至北北东向,而南北地震带以东、长江以北地区为北东东至近东西向,华南块体上为北北西至北西向,与滑线场理论模型基本吻合。反映出中国大陆地壳变形的压应力主要来自印度板块与欧亚板块的俯冲碰撞,而太平洋板块与菲律宾板块对欧亚板块的作用力以及地幔向上的作用力总体上占次要地位。地震的孕育和发生可能与应力场中的畸变区有关。水平形变还表明,印度板块以49.8mm/a向北推进。Abstract: Based on two periods of observad data obtained in 1994 and 1996 from the national GPS network,the current horizontal crustal deformation stress field in China Continent has been studied in the paper.The results show that the principal compressive stress field for Qinghai Tibet block and Xinjiang block in the west is nearly in the trend of SN to NNE,for the area on the east of SN seismic zone and on the north of Changjiang River is NE to approximate EW and for South China block is NNW to NW,which are basically consistent with the theoretical model of slide line field.It has reflected that the compressive stress of crustal deformation in China Continent comes mainly from the underthrust collision of Indian plate and Eurasia plate,while the force from Pacific plate and Philippine plate towards Eurasia plate and the upwards force from the mantle have taken a secondary position.The development and the occurrence of an earthquake might be related to the distorted area.The horizontal deformation also indicates that Indian plate has driven northwards by a value of 49.8mm/a.
-
Key words:
- horizontal deformation /
- strain /
- stress field /
- China /
- Strain analysis
-
[1] 1 李四光.地质力学概论.北京: 科学出版社, 1973.
2 许桂林,朱秀岗,孙世宗.我国大陆应力场特征及其强震危险性预测.国家地震局科技发展司.中国大陆2005年前 强震危险性预测研究.北京: 地震出版社, 1997.136-142
3 M.巴特.地震学引论.许立达译.北京: 地震出版社, 1978.
4 武汉测绘学院大地测量系地震测量教研组.大地形变测量.北京: 地震出版社, 1980.
5 黄立人,郭良迁.华北北部GPS观测(1995-1996)及其结果解释.地震地质.1980, 20(4): 423-430
6 M.P.毕令斯著.1956,构造地质学.张炳熹等译.北京: 地质出版社, 1976.
7 汪素云,许忠淮,俞言祥,等.中国及其邻区周围板块作用力的研究.地球物理学报.1996, 39(6): 764-771
8 李延兴,胡新康,赵承坤, 等.GPS跟踪站观测的初步结果所揭示的板内及板缘地壳运动.地壳形变与地震.1998,18(2): 28-34
9 P.Molnar et al, Cenozoic Tectonics of Asia: Effects of a Cantinetal Collision, Science, 189, 1975.
10 丁国瑜,卢演俦.板内块体的现代运动.见: 国家地震局《中国岩石圈动力学图集》编委会.中国岩石圈动力学图集.北京: 中国地图出版社, 1989.21.
11 应绍奋, 沈永坚,黄立人,等.中国大陆形变场特征及长期地震危险区划.见: 国家地震局科技发展司.中国大陆2005年前强震危险性预测研究.北京: 地震出版社, 1997.163-171
12 郭良迁,应绍奋.从GPS复测结果初步研究华北北部的水平形变及构造活动.中国地震, 1998, 14(4): 11-19
13 P.摩尔纳 P.塔波尼尔.中国东部构造与印度次大陆-亚欧大陆碰撞的关系.滑动线场理论用于大型大陆构造.赵秋波译.国外地质.1978, (5).
14 P.塔波尼尔.P.摩尔纳.滑动线场理论和大型大陆构造.黄秀铭译,国外地质, 1977, (9). -

计量
- 文章访问数: 1430
- HTML全文浏览量: 259
- PDF下载量: 108