Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon
Abstract We present the first geomorphic evidence for successive, surface‐rupturing earthquakes throughout the Quaternary on the Tintina fault in the Yukon Territory, northwestern Canada. A ∼130‐km‐long series of scarps and pressure ridges offset 2.6 Ma and 132 ka landforms by ∼500–1,500 m and 65–85...
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| Format: | Article |
| Language: | English |
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Wiley
2025-07-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2025GL116050 |
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| author | Theron Finley Edwin Nissen John F. Cassidy Guy Salomon Lucinda J. Leonard Duane Froese |
| author_facet | Theron Finley Edwin Nissen John F. Cassidy Guy Salomon Lucinda J. Leonard Duane Froese |
| author_sort | Theron Finley |
| collection | DOAJ |
| description | Abstract We present the first geomorphic evidence for successive, surface‐rupturing earthquakes throughout the Quaternary on the Tintina fault in the Yukon Territory, northwestern Canada. A ∼130‐km‐long series of scarps and pressure ridges offset 2.6 Ma and 132 ka landforms by ∼500–1,500 m and 65–85 m, respectively, indicating a dextral slip rate of ∼0.2–0.8 mm/yr. However, early Holocene terraces are undeformed across the fault, implying that the elapsed time since the most recent earthquake is >12 kyr and that the fault may be nearing the end of a long interseismic cycle. A minimum slip deficit of ∼6 m has likely accrued since the last major surface rupture, and future earthquakes could exceed Mw 7.5. These results highlight the hazards of earthquakes on mature, low‐slip‐rate intraplate faults, which may have exceptionally long recurrence intervals, elude instrumental networks, and lack a distinct surface expression due to landscape resetting. |
| format | Article |
| id | doaj-art-0b8b8dce66fc4533be752567d12f6716 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-0b8b8dce66fc4533be752567d12f67162025-08-20T03:08:48ZengWileyGeophysical Research Letters0094-82761944-80072025-07-015214n/an/a10.1029/2025GL116050Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, YukonTheron Finley0Edwin Nissen1John F. Cassidy2Guy Salomon3Lucinda J. Leonard4Duane Froese5School of Earth and Ocean Sciences University of Victoria Victoria BC CanadaSchool of Earth and Ocean Sciences University of Victoria Victoria BC CanadaSchool of Earth and Ocean Sciences University of Victoria Victoria BC CanadaSchool of Earth and Ocean Sciences University of Victoria Victoria BC CanadaSchool of Earth and Ocean Sciences University of Victoria Victoria BC CanadaDepartment of Earth and Atmospheric Sciences University of Alberta Edmonton AB CanadaAbstract We present the first geomorphic evidence for successive, surface‐rupturing earthquakes throughout the Quaternary on the Tintina fault in the Yukon Territory, northwestern Canada. A ∼130‐km‐long series of scarps and pressure ridges offset 2.6 Ma and 132 ka landforms by ∼500–1,500 m and 65–85 m, respectively, indicating a dextral slip rate of ∼0.2–0.8 mm/yr. However, early Holocene terraces are undeformed across the fault, implying that the elapsed time since the most recent earthquake is >12 kyr and that the fault may be nearing the end of a long interseismic cycle. A minimum slip deficit of ∼6 m has likely accrued since the last major surface rupture, and future earthquakes could exceed Mw 7.5. These results highlight the hazards of earthquakes on mature, low‐slip‐rate intraplate faults, which may have exceptionally long recurrence intervals, elude instrumental networks, and lack a distinct surface expression due to landscape resetting.https://doi.org/10.1029/2025GL116050earthquakefaultpaleoseismologygeomorphologyhazardYukon |
| spellingShingle | Theron Finley Edwin Nissen John F. Cassidy Guy Salomon Lucinda J. Leonard Duane Froese Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon Geophysical Research Letters earthquake fault paleoseismology geomorphology hazard Yukon |
| title | Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon |
| title_full | Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon |
| title_fullStr | Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon |
| title_full_unstemmed | Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon |
| title_short | Large Surface‐Rupturing Earthquakes and a >12 kyr, Open Interseismic Interval on the Tintina Fault, Yukon |
| title_sort | large surface rupturing earthquakes and a 12 kyr open interseismic interval on the tintina fault yukon |
| topic | earthquake fault paleoseismology geomorphology hazard Yukon |
| url | https://doi.org/10.1029/2025GL116050 |
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