四川马尔康6.0级震群区流域地貌特征与控制因素研究

周文英; 梁明剑; 魏娅玲; 宫悦; 廖程; 左洪; 杨力; 薛莲; 毛泽斌

doi:10.11899/zzfy20230409

四川马尔康6.0级震群区流域地貌特征与控制因素研究

doi: 10.11899/zzfy20230409

周文英^{1, 2,},
梁明剑^{1, 2, ,},
魏娅玲^{1, 2},
宫悦¹,
廖程^{1, 2},
左洪^{1, 2},
杨力^{1, 2},
薛莲¹,
毛泽斌³

1.
四川省地震局, 成都 610041
2.
中国地震局成都青藏高原地震研究所, 成都 610041
3.
成都市永利联科技有限公司, 成都 610000

基金项目: 四川省自然科学基金（2022NSFSC0211）；中国地震局地震预测研究所基本科研业务费（CEAIEF2022050502）；国家重点研发计划（2021YFC3000601）；西藏拉萨地球物理国家野外科学观测站研究课题（NORSLS2104）

详细信息

作者简介:
周文英，女，生于1988年。硕士，工程师。主要从事构造地貌方面的研究。E-mail：zhouwenying10@163.com

通讯作者:
梁明剑，男，生于1979年。博士，高级工程师。主要从事活动构造方面的研究。E-mail：23800794@qq.com

计量
- 文章访问数: 38
- HTML全文浏览量: 16
- PDF下载量: 11
- 被引次数: 0
出版历程
- 收稿日期: 2022-08-03
- 刊出日期: 2023-12-01

Regional Geomorphic Characteristics and its factors Controlling of the Maerkang M6.0 Earthquake Swarm in Sichuan Province, Eastern Tibetan Plateau

Zhou Wenying^{1, 2
,},
Liang Mingjian^{1, 2
, ,},
Wei Yaling^{1, 2},
Gong Yue¹,
Liao Cheng^{1, 2},
Zuo Hong^{1, 2},
Yang Li^{1, 2},
Xue Lian¹,
Mao Zebin³

1.
Sichuan Earthquake Agency, Chengdu 610041, China
2.
Chengdu Institute of the Tibetan Plateau Earthquake Research, China Earthquake Administration, Chengdu 610041, China
3.
Yonglilink Science & Technology Company Limited, Chengdu 610000, China

摘要

摘要: 2022年6月10日四川马尔康6.0级震群地震发生在青藏高原东缘，位于强烈隆升的龙门山及其西缘高原腹地过渡地带，断裂构造复杂，水系发育，小震与中强地震活动频发。基于90 m×90 m空间分辨率的SRTM3数据，利用数字地貌分析方法提取了马尔康6.0级震群所在的脚木足河流域坡度、起伏度、面积-高程积分和河道陡峭指数等地貌参数，结合降水和岩性数据进行综合分析。研究结果表明，脚木足河流域坡度、起伏度、面积-高程积分和河道陡峭指数整体表现出西北低、东南高的特征。构造活动是导致区域地貌参数呈现差异性的主要原因，地貌参数高值主要分布于龙日坝断裂两侧，沿松岗断裂两侧展布，龙日坝断裂东侧是构造变形与差异性隆升强烈的龙门山地区；龙日坝断裂西侧是多条断裂交汇的构造复杂区，中强地震活跃，地貌破坏与重塑作用相对强烈，这可能是地貌参数高值的主要原因。
- 马尔康6.0级震群 /
- 青藏高原东缘 /
- 脚木足河流域 /
- 地貌参数
Abstract: On June 10, 2022, the Maerkang M6.0 earthquake swarm occurred inside the Baryan Har Block, eastern Tibetan Plateau. The earthquake swarm located in the transition zone between the strongly uplifted Longmen Mountains and the plateau hinterland, which is characterized by complex structures, well-developed water systems, frequent occurrence of moderate and small earthquakes. Based on SRTM3 data with spatial resolution of 90 m × 90 m, the slope, relief amplitude (RA), hypsometric integral (HI) and channel steepness index (k_sn) of Jiaomuzu River Basin in the Maerkang M6.0 earthquake swarm areas are extracted by digital geomorphological analysis method. Combined with precipitation and lithology data, the results show that the slope, RA, HI and k_sn values of Jiaomuzu River Basin showed the characteristics of low northwest and high southeast. Tectonic activity is the main reason for the difference of regional geomorphic parameters. The high values of the geomorphological parameters are mainly distributed on both sides of the Longriba fault, and along both sides of Songgang fault. The eastern side of the Longriba fault is the Longmen Mountains area that is characterized by the strong tectonic deformation and significant differential uplift. The western side of the Longriba fault is a complex structural area with a characteristics of multiple faults intersect and frequent occurrence of moderate earthquakes, where the geomorphological damage and remodeling are relatively strong. These may be the main reasons for the high values of geomorphic parameters in our study region.
- The Maerkang M6.0 earthquake swarm /
- Eastern Tibetan Plateau /
- Jiaomuzu River /
- Geomorphological parameters

HTML全文

图 1 研究区位置及周边主要活动断裂分布

Figure 1. The distribution map of the main active faults, earthquakes and the location of the study area

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图 2 研究区地形地貌

Figure 2. The topography map showing the rives, active faults and earthquake in the study area

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图 3 亚流域分布

Figure 3. Distribution map of sub-basins

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Figure 4. Slope versus area in a log-log plot

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图 5 研究区坡度分布

Figure 5. The slope distribution map of study area

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图 6 研究区地形起伏度分布

Figure 6. The relief amplitude distribution map of study area

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图 7 研究区典型流域地貌

Figure 7. Typical geomorphology in the study area

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图 8 研究区HI分布

Figure 8. HI values distribution map of study area

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图 9 研究区k_sn分布

Figure 9. Spatial distribution map of channel steepness index

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图 10 研究区年均降水量

Figure 10. Spatial distribution of annual precipitation of study area

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图 11 研究区岩性分布

Figure 11. Geological map of study area

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