The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault
In transtensional regions, structures striking obliquely to the extension direction generally exhibit oblique or partitioned slips. However, their on-fault partitioning patterns and controlling factors are less known, hindering our understanding of the evolution of the rifting process. Here, we stud...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-09-01
|
| Series: | Remote Sensing |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-4292/14/18/4553 |
| _version_ | 1797482794645979136 |
|---|---|
| author | Yuqing He Teng Wang Li Zhao |
| author_facet | Yuqing He Teng Wang Li Zhao |
| author_sort | Yuqing He |
| collection | DOAJ |
| description | In transtensional regions, structures striking obliquely to the extension direction generally exhibit oblique or partitioned slips. However, their on-fault partitioning patterns and controlling factors are less known, hindering our understanding of the evolution of the rifting process. Here, we study the slip distribution of the 2021 Mw6.7 Lake Hovsgol (Mongolia) earthquake occurred in a pull-apart basin using InSAR observations. Our preferred slip model shows a remarkable feature, with three zones exhibiting distinct slip directions at different depths. The Coulomb stress change analysis reveals that this pattern is likely controlled by the left-lateral motion of the Mondy Fault to the north, which also inhibits the growth of a boundary fault to the east of the lake, shaping the asymmetric graben structure in this region. Our results imply the important role of major strike-slip faults bounding the pull-apart basin in the formation and evolution of the oblique rift. |
| first_indexed | 2024-03-09T22:38:32Z |
| format | Article |
| id | doaj.art-42a51259cbda41e3b8489ead2600594e |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T22:38:32Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-42a51259cbda41e3b8489ead2600594e2023-11-23T18:44:32ZengMDPI AGRemote Sensing2072-42922022-09-011418455310.3390/rs14184553The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip FaultYuqing He0Teng Wang1Li Zhao2School of Earth and Space Sciences, Peking University, Beijing 100089, ChinaSchool of Earth and Space Sciences, Peking University, Beijing 100089, ChinaSchool of Earth and Space Sciences, Peking University, Beijing 100089, ChinaIn transtensional regions, structures striking obliquely to the extension direction generally exhibit oblique or partitioned slips. However, their on-fault partitioning patterns and controlling factors are less known, hindering our understanding of the evolution of the rifting process. Here, we study the slip distribution of the 2021 Mw6.7 Lake Hovsgol (Mongolia) earthquake occurred in a pull-apart basin using InSAR observations. Our preferred slip model shows a remarkable feature, with three zones exhibiting distinct slip directions at different depths. The Coulomb stress change analysis reveals that this pattern is likely controlled by the left-lateral motion of the Mondy Fault to the north, which also inhibits the growth of a boundary fault to the east of the lake, shaping the asymmetric graben structure in this region. Our results imply the important role of major strike-slip faults bounding the pull-apart basin in the formation and evolution of the oblique rift.https://www.mdpi.com/2072-4292/14/18/45532021 Mongolia earthquakeslip distributionoblique riftCoulomb stress change analysishalf grabenslip partitioning |
| spellingShingle | Yuqing He Teng Wang Li Zhao The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault Remote Sensing 2021 Mongolia earthquake slip distribution oblique rift Coulomb stress change analysis half graben slip partitioning |
| title | The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault |
| title_full | The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault |
| title_fullStr | The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault |
| title_full_unstemmed | The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault |
| title_short | The 2021 Mw6.7 Lake Hovsgol (Mongolia) Earthquake: Irregular Normal Faulting with Slip Partitioning Controlled by an Adjacent Strike-Slip Fault |
| title_sort | 2021 mw6 7 lake hovsgol mongolia earthquake irregular normal faulting with slip partitioning controlled by an adjacent strike slip fault |
| topic | 2021 Mongolia earthquake slip distribution oblique rift Coulomb stress change analysis half graben slip partitioning |
| url | https://www.mdpi.com/2072-4292/14/18/4553 |
| work_keys_str_mv | AT yuqinghe the2021mw67lakehovsgolmongoliaearthquakeirregularnormalfaultingwithslippartitioningcontrolledbyanadjacentstrikeslipfault AT tengwang the2021mw67lakehovsgolmongoliaearthquakeirregularnormalfaultingwithslippartitioningcontrolledbyanadjacentstrikeslipfault AT lizhao the2021mw67lakehovsgolmongoliaearthquakeirregularnormalfaultingwithslippartitioningcontrolledbyanadjacentstrikeslipfault AT yuqinghe 2021mw67lakehovsgolmongoliaearthquakeirregularnormalfaultingwithslippartitioningcontrolledbyanadjacentstrikeslipfault AT tengwang 2021mw67lakehovsgolmongoliaearthquakeirregularnormalfaultingwithslippartitioningcontrolledbyanadjacentstrikeslipfault AT lizhao 2021mw67lakehovsgolmongoliaearthquakeirregularnormalfaultingwithslippartitioningcontrolledbyanadjacentstrikeslipfault |