Stability of the regional stress field in central Japan during the late Quaternary inferred from the stress inversion of the active fault data
Stability of the regional stress field in central Japan during the late Quaternary inferred from the stress inversion of the active fault data
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从活断层应力反演推断日本中部晚第四纪区域应力场的稳定性
DOI：
10.1029/2012gl054094
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发表时间：
2012
影响因子：
5.2
通讯作者：
A
中科院分区：
文献类型：
--
作者：
Tsutsumi;H.;Sato;K.;and Yamaji;A
我们分析了日本中部37个活动断层的169个地质断层滑动数据，以研究晚第四纪应力场的稳定性。现代的压力状态已被记录与前所未有的准确性，但是，他们的稳定性在时间尺度上超出仪器观测是不充分的理解。由于应力场在地质历史中发生了变化，我们将日本中部目前的应力条件与地球物理观测确定的条件进行了比较，这些条件是通过反演过去105年来表现出累积位移的活动断层的断层滑动数据确定的。从断层滑动数据获得的最大应力轴趋势为ESE-WNW。这种应力状态占数据的97%，并支持该地区具有反向和走滑方向的斜断层交错的事实。最佳应力与现今应力状态相似，表明日本中部地区的应力场在过去的105 a中是均匀稳定的。
We analyzed 169 geological fault‐slip data from 37 active faults in central Japan to investigate the late Quaternary stress field stability. Modern stress states have been documented with unprecedented accuracy; however, their stability over time scales beyond instrumental observations is inadequately understood. Because the stress field has changed in the geological past, we compared present stress conditions in central Japan, determined from geophysical observations, with conditions determined by inverting the fault‐slip data from active faults that exhibited cumulative displacement for the past ∼105years. The maximum stress axis obtained from fault‐slip data trends ESE–WNW. This state of stress accounts for 97% of the data and supports the fact that oblique faults with reverse and strike‐slip senses are interlaced in the region. The optimal stress is similar to the present stress state, indicating that the stress field in central Japan has been uniform and stable over the past ∼105years.