We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
2023年甘肃积石山6. 2级地震发震构造浅析.
- Authors
杨攀新; 熊仁伟; 胡朝忠; 高原
- Abstract
On December 18, an Ms6. 2 earthquake occurred in Jishishan County, Gansu Province, which causing casual ties and prope rty losses. The ea_rt hquake occurred on the northeastern margin of the Qinghai-Tibet Pla/teau where developed two groups of typical fault structures due to the extension of the Qinghai-Tibet Pla/teau to the northeast. The NWW trending large left-latera_l strike-slip fauIts are seemed as the boundaries of the active blocks, and the other group of NNW-trending right-latera_l strike-slip faults develop within the blocks as the secondary block boundaries. The Jiashishan Ms6. 2 earthquake occurred in the large compression st epover bet ween the NWW-t rending left-la tera_l stri ke-slip fault zone of the north margin West Qinling and the NNW--trending Riyueshan right--la_teral str ike-slip faul t zone, and the seismogenic tectonic is det ermined to be the southeastern segment of Lajishan fault zone named eastern margin of Jishishan fault. The distribution of a_ftershocks are strictly limited to the south of Yellow River and within the Dahejia tertiary basin in the eastern piedmont of Jishishan. The ridgelines and piedmont lines on the eastern section of Lajishan and Jishishan are discontinuous, and there are fault triangle faces along eas t bank of Yellow River which flows bet ween the two mornit ains. It is specula/ted that a transverse fault with the function of adjusting the regional differential compression deformation is developed in this area. This fault cuts the southeastern segment of Lajishan fault zone and may make the eastern margin of Jishishan fault to be an independent active segment with a length of less than 40 km. It is determined that the possibility of a larger earthquake occurring in this area is not high in near future.
- Publication
Earthquake (1000-3274), 2024, Vol 44, Issue 1, p153
- ISSN
1000-3274
- Publication type
Article
- DOI
10.12196/j.issn.1000-3274.2024.01.011