云南莲峰、昭通—鲁甸断裂带面积—高程积分的构造地貌研究
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

本文为西藏洛扎县第一次全国自然灾害综合风险普查房屋建筑与市政设施调查项目(编号:GZFCG2022- 7250)的成果


Study on tectonic geomorphology of area—elevation integral in Lianfeng and Zhaotong—Ludian fault zone
Author:
Affiliation:

Fund Project:

单位:
  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    笔者等基于ASTER GDEM数据,提取莲峰、昭通—鲁甸断裂带集水区,计算该区亚流域盆地的面积—高程积分值,并结合野外剖面特征、历史地震、断裂构造特征及活动特征等,初步探讨了莲峰、昭通—鲁甸断裂带的构造地貌特征及其动力学机制。得到以下几点认识:① 研究区除鲁甸盆地外,大部分地区的地貌发育阶段为壮年期;② 研究区面积—高程积分值(HI)主要受控于构造活动,岩性的抗侵蚀性和水系侵蚀发挥局部或次要作用;③ 面积—高程积分值(HI)对研究区不同构造抬升强度地区的响应方式不同:构造强烈抬升区,HI值反映了集水流域受到强烈的构造抬升和侵蚀的共同作用;构造抬升减弱区,HI值反映了缓慢的构造隆升和沉积作用的共同结果。

    Abstract:

    In order to explore the corresponding models of the area—elevation integral values (HI) of the Lianfeng and Zhaotong—Ludian fault zones to the development of the geomorphology in the tectonic active areaMethods:Based on ASTERGDEM data, the catchment areas of Lianfeng and Zhaotong—Ludian fault zones are extracted, and the area—elevation integral values of subbasin basins in this area are calculated. Combined with the characteristics of field profile, historical earthquakes, fault structure and activity, the tectonic geomorphological features and dynamic mechanism of Lianfeng and Zhaotong—Ludian fault zones are discussed. Results:The extracted slope and relief profiles across the Lianfeng Fault and the Zhaotong—Ludian Fault show that the slope and relief of the Jinyang Fold Uplift area west of the Jinsha River vary drastically, and reach a maximum at the Jinsha River, passing through the Lianfeng Fault. The Zhaotong—Ludian fault began to decrease, and reached the lowest value in the Ludian Basin, and then began to increase when it entered the Weining fold fault uplift area, but the slope and undulation were still smaller than the Jinyang fold fault uplift area. The geomorphic type is obviously controlled by faults, and the uplift terrain affected by Lianfeng fault and Baogunao—Xiaohe fault constitutes the western boundary of Ludian Basin. The HI value of the basin in the middle and lower reaches of the Jinsha River has a good consistency with the regional geomorphic uplift and fault distribution. The juvenile landform area is small, scattered between the Lianfeng fault and the Zhaotong—Ludian fault, and most of the areas belong to the mature stage (Fig. 4b). The high- value area is roughly consistent with the strike of the fault, while the area where the fault passes shows a relatively low- value area, revealing the control effect of tectonic activities on the development of landforms. Conclusions:① Except Ludian basin, the geomorphological development stage of most areas in the study area is in the adult stage. ② The area—elevation integral value (HI) of the study area is mainly controlled by tectonic activity, and the erosion resistance of lithology and river system play a local or secondary role. ③ The response of area—elevation integral value (HI) to different tectonic uplift intensity areas in the study area is different: in the strong tectonic uplift area, the HI value reflects the combined action of strong tectonic uplift and erosion in the catchment basin; in the tectonic uplift weakening area, HI value reflects the common result of slow tectonic uplift and sedimentation.

    参考文献
    相似文献
    引证文献
引用本文

秦川,李敬波,郑立龙,白赟.2023.云南莲峰、昭通—鲁甸断裂带面积—高程积分的构造地貌研究[J].地质论评,69(3):2023030007,[DOI].
QIN Chuan, LI Jingbo, ZHENG Lilong, BAI Yun.2023. Study on tectonic geomorphology of area—elevation integral in Lianfeng and Zhaotong—Ludian fault zone[J]. Geological Review,69(3):2023030007.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-09-20
  • 最后修改日期:2023-04-22
  • 录用日期:
  • 在线发布日期: 2023-05-18
  • 出版日期: 2023-05-15