Paleoearthquake Investigations of the Mae Hong Son Fault, Mae Hong Son Region, Northern Thailand

Autor:	Krit Won-In, Weerachat Wiwegwin, Santi Pailoplee, Punya Charusiri, Suwith Kosuwan, Ken-ichiro Hisada, Preecha Saithong, Kitti Khaowiset
Rok vydání:	2014
Předmět:	geography geography.geographical_feature_category Landform Paleoseismology Active fault Fault (geology) Geotechnical Engineering and Engineering Geology Oceanography Fault scarp Geophysics Ridge Geomorphology Cenozoic Geology Seismology Slip rate
Zdroj:	Journal of Earthquake and Tsunami. :1450007
ISSN:	1793-7116 1793-4311
DOI:	10.1142/s1793431114500079
Popis:	We applied remote sensing and aerial photographic techniques to a study of the Mae Hong Son Fault (MHSF), located in the Mae Hong Son region, northern Thailand. Several fault lines are recognized in the region, trending mainly NE–SW, NW–SE, and N–S. The main morphotectonic landforms associated with the MHSF are fault scarps, offset streams, linear valleys, triangular facets, offset ridge crests, hot springs, and linear mountain fronts. A trench, a quarry, and a road cut in Caenozoic strata were used to analyze fault geometries in the area. We identified eight paleoearthquake events from trenching, quarry, and road-cut data, and from optically stimulated luminescence (OSL) and thermoluminescence (TL) dating. The OSL and TL ages of the events are: (1) 78,000 yr BP; (2) 68,000 yr BP; (3) 58,000 yr BP; (4) 48,000 yr BP; (5) 38,000 yr BP; (6) 28,000 yr BP; (7) 18,000 yr BP; and (8) 8,000 yr BP. The recurrence interval of seismic events on the MHSF appears to be ca. 10,000 years, and the slip rate was estimated as ca. 0.03–0.13 mm/yr. There is a low possibility of a large earthquake on the MHSF in the near future.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::37a25a680a6587fdf6b34299a35da94e https://doi.org/10.1142/s1793431114500079 Zobrazit plný text záznamu