基于面积—高程积分对龙门山南段山前河流的构造地貌研究

现代地质 ›› 2015, Vol. 29 ›› Issue (4): 727-737.

基于面积—高程积分对龙门山南段山前河流的构造地貌研究

邵崇建¹，李勇¹，赵国华¹，颜照坤¹，聂舟²，闫亮¹，李敬波¹，郑立龙¹，周游¹，彭海燕³

(1.成都理工大学油气藏地质及开发工程国家重点实验室，四川成都 610059；2.中国石油西南油气田分公司
川西北气矿，四川江油 621700；3.四川省核工业地质局二八三大队, 四川达州 635099)

出版日期:2015-07-08 发布日期:2015-10-29
作者简介:邵崇建，男，硕士研究生，1989年出生，第四纪地质学专业，主要从事构造地貌学研究。 Email：scj350936@sina.com。
基金资助:
国家自然科学基金项目(41372114，41340005，41172162，40972083，41402159)；四川省教育厅科研项目(15ZB0085)。

Tectonic Geomorphology Analysis of Piedmont Rivers in the Southern Section of Longmenshan Based on Hypsometric Integral

SHAO Chong-jian¹，LI Yong¹，ZHAO Guo-hua¹，YAN Zhao-kun¹，NIE Zhou²，YAN Liang¹，LI Jing-bo¹，ZHENG Li-long¹，ZHOU You¹，PENG Hai-yan³

(1.State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation，Chengdu University Technology，Chengdu, Sichuan 610059，China；
2.Northwest Sichuan Gas Mine of Southwest Oil and Gas Company of PetroChina，Jiangyou，Sichuan 621700，China;
3.No.283 Brigade of Sichuan Nuclear Geological Bureau，Dazhou, Sichuan 635099，China)

Online:2015-07-08 Published:2015-10-29

摘要/Abstract

摘要：

1970年和2013年龙门山构造带南段分别发生了大邑西Ms 6.2级地震和芦山Ms 7.0级地震，表明该地区新构造运动相对活跃，为研究构造-地貌-水系的理想场所。基于DEM数据，提取了龙门山南段山前地区的西河(R₁)、出江河(R₂)、斜江河(R₃)、文井河(R₄)、三郎河(R₅)和泰安河(R₆)6条河流及其次流域，通过计算得到这6条河流及其次流域的面积-高程积分值和面积-高程积分曲线，对该地区的构造活动、地貌演化特征进行分析。结果显示：(1)研究区域总体上面积-高程积分值从NW向往SE向递减，表明从NW向往SE向区域活动性整体上在减弱，同时代地层出露的时间越来越晚。(2)研究区域双石—大川断裂上盘SW段的面积-高程积分值比NE段高，表明双石—大川断裂活动性从SW向往NE向有减弱的趋势。(3)随着前展式逆冲推覆作用持续，按照Ohmori模式推测出山地、丘陵、平原的发展模式：①山地，未来山地区域会继续长高，其面积-高程积分渐渐接近0.6(F阶段)，面积-高程积分曲线开始从S形向凸形方向发展，山地型河流会由壮年期向幼年期发育；②丘陵，其面积-高程积分曲线开始从凹形向S形发展，丘陵型河流会由老年期向壮年期发展，到达壮年期之后，会进入山地的发展模式；③平原，虽然逆冲抬升作用会增强，但地形雨降雨带也会逐渐靠近，反而造成其剥蚀强度大于抬升强度，其发展模式会渐渐进入丘陵模式。

关键词: 面积-高程积分, 构造地貌, 地貌演化, 龙门山南段

Abstract:

The southern section of Longmenshan fault belt happened Dayi Ms 6.2 earthquake in 1970 and Lushan Ms 7.0 earthquake in 2013，indicating that this area has active neotectonics movement and is the ideal place to study the relation of structure, topography and river. This paper extracted the drainage basins of six rivers in the study area and their sub-drainage basins using GIS technology based on DEM data. These rivers are Xi River (R₁)，Chujiang River (R₂)，Xiejiang River (R₃)，Wenjing River (R₄)，Sanlang River (R₅) and Tai’an River (R₆).The hypsometric integral values of these six rivers were calculated and their curves were drawn to analysis the tectonic activity and geomorphological evolution of the study area. The conclusion can be drawn as follows:(1) The hypsometric integral values descend from NW to SE,indicating that the regional activity descends from NW to SE and the contemporary strata exposed in the SE are younger than those in the NW.(2)The hypsometric integral value of SW segment on the hanging wall of Shuangshi-Dachuan fault is larger than that of SE segment, indicating that the tectonic activity of Shuangshi-Dachuan fault becomes waken from NW to SE. (3)According to Ohmori’s model，with the pre-show style over thrust advancing forward to foreland, the evolutions of mountains, hills and plains can be speculated that ① in mountains, the uplift of mountain will continue until it reaches the highest point with hypsometric integral value equaling to 0.6，and hypsometric integral curves begin to change from S shape to convex shape, and the river will develop from mature stage to juvenile stage; ② in hills, the hypsometric integral curves begin to change from concave shape to S shape，and the river will develop from old stage to mature stage，then the hill will develop to be the mountain; ③ in plains, although the thrusting uplift increases,the local-rain belt will gradually close to the plain, causing the erosion intensity larger than uplift strength，thus the development mode will gradually become to be the hill development mode.

Key words: hypsometric integral, tectonic geomorphology, landform evolution, the southern section of Longmenshan

中图分类号:

P542

邵崇建，李勇，赵国华，颜照坤，聂舟，闫亮，李敬波，郑立龙，周游，彭海燕. 基于面积—高程积分对龙门山南段山前河流的构造地貌研究[J]. 现代地质, 2015, 29(4): 727-737.

SHAO Chong-jian1，LI Yong1，ZHAO Guo-hua1，YAN Zhao-kun1，NIE Zhou2，YAN Liang1，LI Ji. Tectonic Geomorphology Analysis of Piedmont Rivers in the Southern Section of Longmenshan Based on Hypsometric Integral[J]. Geoscience, 2015, 29(4): 727-737.

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