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Large Holocene paleoseismic events and synchronized travertine formation: a case study of the Kurai fault zone (Gorny Altai, Russia).
- Source :
- International Geology Review; Sep2023, Vol. 65 Issue 15, p2426-2446, 21p
- Publication Year :
- 2023
-
Abstract
- The Kurai Fault Zone (KFZ) is one of the most hazardous seismogenic structures in the Gorny Altai (Russia), which bounds the largest Kurai and Chuya intermontane basins from the north. Trenching studies, radiocarbon dating of colluvial wedge deposits, and <superscript>230</superscript>Th-U dating of seismogenic travertine of the Meshtuyaryk field showed that the fault scarp in the northwestern part of the Chuya Depression was formed by earthquakes that occurred ca. 9.5, 7.7, 5.8, and 4.8–3.4 ka BP. The last two palaeoearthquakes are younger than 3.2 ka BP. The parameters of seismogenic ruptures, as well as the distances between coeval seismogenic travertines along the KFZ, yielded estimates of the M<subscript>w</subscript> of the four oldest palaeoearthquakes as 6.8–7.6 and ESI 2007 shaking intensities of VIII–XI. The results of <superscript>230</superscript>Th-U dating suggest that deposition of the Meshtuyaryk travertines was triggered by three strong palaeoearthquakes at ca. 9.5, 7.7, and 4.8–3.4 ka BP, which activated faults and caused a rapid rise along them of ambient-temperature bicarbonate groundwaters previously sealed in deep-seated limestone aquifers. [ABSTRACT FROM AUTHOR]
- Subjects :
- FAULT zones
TRAVERTINE
HOLOCENE Epoch
RADIOCARBON dating
LIMESTONE
Subjects
Details
- Language :
- English
- ISSN :
- 00206814
- Volume :
- 65
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- International Geology Review
- Publication Type :
- Academic Journal
- Accession number :
- 169951619
- Full Text :
- https://doi.org/10.1080/00206814.2022.2145510