|本期目录/Table of Contents|

[1]刘 超,杜 鹏,雷启云,等.基于无人机航测的天景山断裂孟家湾地貌精细解译及活动构造定量参数提取[J].地震研究,2022,45(01):100-108.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0011 ]
 LIU Chao,DU Peng,LEI Qiyun,et al.Fine Geomorphic Interpretation and Quantitative-parameter Extraction of the Active Structure of Mengjiawan of the Tianjingshan Fault Based on UAV Photogrammetric Technique[J].Journal of Seismological Research,2022,45(01):100-108.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0011 ]
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基于无人机航测的天景山断裂孟家湾地貌精细解译及活动构造定量参数提取(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
45
期数:
2022年01期
页码:
100-108
栏目:
出版日期:
2022-01-20

文章信息/Info

Title:
Fine Geomorphic Interpretation and Quantitative-parameter Extraction of the Active Structure of Mengjiawan of the Tianjingshan Fault Based on UAV Photogrammetric Technique
作者:
刘 超杜 鹏雷启云武治群吕俊强余思汗
(宁夏回族自治区地震局,宁夏 银川 750001)
Author(s):
LIU ChaoDU PengLEI QiyunWU ZhiqunLYU JunqiangYU Sihan
(Earthquake Agency of Ningxia Hui Autonomous Region,Yinchuan 750001,Ningxia,China)
关键词:
无人机航测技术 天景山断裂 构造地貌 精细解译 定量参数
Keywords:
UAV photoqrammetric technique the Tianjingshan Fault tectonic landforms fine interpretation quantitative parameters
分类号:
P315.2
DOI:
10.20015/j.cnki.ISSN1000-0666.2022.0011
摘要:
利用无人机摄影测量技术航测天景山断裂孟家湾的地表地形地貌数据,以获取的数字高程模型为基础,通过构造地貌精细解译进一步提取地震断层的水平位移量及垂直位错量,计算断层的平均水平滑动速率,并分析判识了古地震事件。结果表明:①研究区发育3期河流阶地T3、T2、T1,且均被断错,最新的冲沟T0未见错动; ②在T1阶地面上提取水平位移量为(7.77±0.98)m,计算得到全新世中期以来的平均水平滑动速率为0.86~0.91 mm/a; ③在T1阶地面上跨陡坎提取垂直位错量为(0.61±0.11)m,其坡度存在2个明显拐点,代表2次地表破裂型地震事件,推测在12 000 a前,即晚更新世末期或全新世初期以来至少发生过2次地表破裂型地震。
Abstract:
The Unmanned Aerial Vehicle(UAV)photogrammetric technique was used to collect the topographic and geomorphic data of Mengjiawan observatory site in the Tianjingshan Fault in order to get the digital elevation model.Then,through fine interpretation of tectonic geomorphology,the horizontal displacement and vertical dislocation of seismic faults were extracted.The average horizontal slip rate of the fault was calculated,and the paleoseismic events were analyzed and identified.The results show that:①Three stages of river terraces T3,T2 and T1 developed in the study area,and all of them were interrupted,but the latest gully T0 was not disturbed.②The average,horizontal,slip-rate since the middle of Holocene was 0.86-0.91 mm/a,which was calculated on the basis of the horizontal displacement of(7.77±0.98)m on the T1 terrace.③The vertical dislocation across the steep ridge on terrace T1 was(0.61±0.11)m,and the terrace's slope had two obvious inflection points,which represented two seismic events in the form of surface rupture.It was presumed that there had been at least two seismic events in the form of surface rupture since the end of the Late Pleistocene or the beginning of the Holocene,namely 12 000 years ago.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2021-05-15
基金项目:宁夏自然科学基金(2020AAC03443)、地震科技星火计划项目(XH19047)、宁夏回族自治区重点研发计划重大项目(2018BFG02012)和宁夏地震局科技创新团队(CX2019-1)联合资助.

更新日期/Last Update: 2022-01-20