地理学报 ›› 1982, Vol. 37 ›› Issue (2): 111-122.doi: 10.11821/xb198202001

• 论文 •    下一篇

东南沿海水系及新构造应力场

艾南山1, 梁国昭2, Scheidegger. A. E3   

  1. 1. 兰州大学;
    2. 广州地理研究所;
    3. 奥地利, 维也纳技术大学
  • 出版日期:1982-04-15 发布日期:1982-04-15
  • 基金资助:
    中奥学者交流计划和联合国大学资助

THE VALLEY TRENDS AND NEOTECTONIC STRESS FIELD OF SOUTHEAST CHINA

Ai Nan-shan1, Liang Guo-zhao2, Scheidegger. A. E. 3   

  1. 1. Lanzhou University, China;
    2. Guangzhou Institute of Geography, China;
    3. Technical University of Vienna, Austria
  • Online:1982-04-15 Published:1982-04-15

摘要: 本文研究范围,除中国的东南沿海及邻近诸省(区)外,还包括越南民主共和国的红河流域,大致从东经123°至109°,北纬18°至30°(见图8)。

关键词: 新构造应力场, 水系分布, 地震断层, 研究区, 东南沿海, 主压应力, 断层面解, 极方向, 区域构造应力场, 东部区

Abstract: The directions of river valley trends in the coastal region of Southeast China and its vicinity were investigated.The distribution of river valleys, like other geomorphological features, is nothing but the result of the antagonistic action of endogenic and exogenic effects. Valleys caused by erosion alone should be randomly oriented. Evidence from statistical ana-lyses of valley directions shows that the latter are not random. This non-randomness of valley directions results from the endogenic effects, the origin of which lies in the global tectonics or plate-tectonics.The determination of the preferred valley orientations in an area has to be carried out by a statistical procedure. For this purpose, a program developed earlier to fit one or more distributions of the type of exp (k cos2θ ) to the direction-data was employed. The best-fitting "mean" directions were determined by computer using a function-minimization procedure. Prom these directions the principal stress directions have been calculated. The latter vary clockwise from N 111°E (in the East) to N 131°E (in the Middle) and to N 175°E (in the "West), they agree with those calculated from fault plane solutions of earthquakes, showing that the valleys of the area can indeed be interpreted as shear phenomena of the neotectonic stress field. This field is a con-sequence of the collision of the Eurasian with the Indian, the Philippine and the Pacific Plates.