Paleoearthquake Investigations of the Mae Hong Son Fault, Mae Hong Son Region, Northern Thailand.
Paleoearthquake Investigations of the Mae Hong Son Fault, Mae Hong Son Region, Northern Thailand.
复制标题
泰国北部湄宏顺地区湄宏顺断层的古地震调查。
DOI：
10.1142/s1793431114500079
复制
发表时间：
2014
影响因子：
1.5
通讯作者：
Pailoplee S. and Saithong P.
中科院分区：
文献类型：
--
作者：
Wiwegwin W.;Hisada K.;Charusiri P.;Kosuwan S.; Pailoplee S. and Saithong P.
我们应用遥感和航空摄影技术来研究位于泰国北部湄宏顺府地区的湄宏顺断层 (MHSF)。该地区发现了几条断层线，主要走向东北-西南、西北-东南和北-南。与 MHSF 相关的主要地貌构造有断层陡坎、偏移溪流、线性山谷、三角面、偏移山脊、温泉和线性山锋。利用新生代地层中的一条沟渠、一个采石场和一条道路来分析该地区的断层几何形状。我们根据挖沟、采石场和路堑数据以及光激发光 (OSL) 和热释光 (TL) 测年确定了八次古地震事件。事件的 OSL 和 TL 年龄为： (1) 78,000 年前； (2) 距今 68,000 年； (3) 距今 58,000 年； (4) 距今 48,000 年； (5) 距今 38,000 年； (6) 28,000年前； (7) 18,000 年 BP； (8) 距今 8,000 年。 MHSF 上地震事件的重现间隔似乎是。 10,000 年，滑移率估计为 asca。 0.03–0.13 毫米/年。 MHSF近期发生大地震的可能性较低。
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 beca. 10,000 years, and the slip rate was estimated asca. 0.03–0.13 mm/yr. There is a low possibility of a large earthquake on the MHSF in the near future.