Monitoring interseismic activity on the Ilan Plain (NE Taiwan) using Small Baseline PS-InSAR, GPS and leveling measurements: partitioning from arc-continent collision and backarc extension
Monitoring interseismic activity on the Ilan Plain (NE Taiwan) using Small Baseline PS-InSAR, GPS and leveling measurements: partitioning from arc-continent collision and backarc extension
复制标题
使用小基线 PS-InSAR、GPS 和水准测量监测宜兰平原（台湾东北部）的震间活动：从弧大陆碰撞和弧后延伸中划分
DOI：
10.1093/gji/ggx394
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发表时间：
2018
影响因子：
2.8
通讯作者：
Pei-Ling Wang
中科院分区：
文献类型：
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作者：
Zhe Su;Jyr-Ching Hu;Erchie Wang;Yongsheng Li;Yinghui Yang;Pei-Ling Wang
宜兰平原位于台湾东北部，是吕宋弧与欧亚板块斜碰撞与弧后伸展（冲绳海槽）的过渡地带。这种从弧-陆碰撞到弧后伸展的突变机制尚不确定。利用全球定位系统（GPS）、水准测量和多干涉图小基线持续散射干涉测量（SBAS-PSI）数据监测盆地的地震间活动。为数据集选择了一个共同的参考站点。将GPS的水平分量和水准数据的垂直测量值转换为视距（LOS）数据，并与SBAS-PSI数据进行比较。对比结果表明，整个宜兰平原在LOS方向上以最大- 11±2 mm yr - 1的速度快速沉降。我们推测垂直变形和人为活动可能在这种变形中起重要作用。结合DInSAR和强震数据，对2005年宜兰地震震源模型进行了联合反演。最佳拟合模型预测2005年宜兰地震是由三兴断层引起的。观测到的张拉变形以正断层为主，并伴有轻微的左旋走滑运动。我们将我们的SBAS-PSI结果与短期（2005-2009）地下水位变化进行了比较。结果表明，虽然不能排除泵送引起的地表沉降，但以琉球弧的快速南移和冲绳海槽的弧后伸展为特征的构造变形是伊兰平原张开的主要特征。此外，包括长水断裂和三兴断裂在内的一系列正、左走滑张拉断裂形成了一个书架状的构造，以适应平原的伸展。伊兰平原虽处于复杂的构造相互作用区，但主要受伸展控制而非缩短控制。由于先前存在的巨大的菲律宾-琉球岛弧被菲律宾海板块刺穿，宜兰平原形成了台湾东北角的残弧后盆地。
The Ilan Plain, located in Northeast Taiwan, represents a transition zone between oblique collision (between the Luzon Arc and the Eurasian Plate) and backarc extension (the Okinawa Trough). The mechanism for this abrupt transition from arc-continent collision to backarc extension remains uncertain. We used Global Positioning System (GPS), leveling and multi-interferogram Small Baseline Persistent Scatterer Interferometry (SBAS-PSI) data to monitor the interseismic activity in the basin. A common reference site was selected for the data sets. The horizontal component of GPS and the vertical measurements of the leveling data were converted to line-of-sight (LOS) data and compared with the SBAS-PSI data. The comparison shows that the entire Ilan Plain is undergoing rapid subsidence at a maximum rate of −11 ± 2 mm yr−1in the LOS direction. We speculate that vertical deformation and anthropogenic activity may play important roles in this deformation. We also performed a joint inversion modeling that combined both the DInSAR and strong motion data to constrain the source model of the 2005 Ilan earthquake. The best-fitting model predicts that the Sansing fault caused the 2005 Ilan earthquake. The observed transtensional deformation is dominated by the normal faulting with a minor left-lateral strike-slip motion. We compared our SBAS-PSI results with the short-term (2005–2009) groundwater level changes. The results indicate that although pumping-induced surface subsidence cannot be excluded, tectonic deformation, including rapid southward movement of the Ryukyu arc and backarc extension of the Okinawa Trough, characterizes the opening of the Ilan Plain. Furthermore, a series of normal and left-lateral strike-slip transtensional faults, including the Choshui and Sansing faults, form a bookshelf-like structure that accommodates the extension of the plain. Although situated in a region of complex structural interactions, the Ilan Plain is primarily controlled by extension rather than by shortening. As the massive, pre-existing Philippines–Ryukyu island arc was pierced by the Philippine Sea Plate, the Ilan Plain formed as a remnant backarc basin on the northeastern corner of Taiwan.
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DOI：
10.1016/s0040-1951(00)00275-4
发表时间：
2001-04
期刊：
--
影响因子：
--
作者：
Shui Yu;B. Kuo
通讯作者：
Shui Yu;B. Kuo
影响因子：
5.2
作者：
Hua Wang;Tim J. Wright;Juliet Biggs
通讯作者：
Hua Wang;Tim J. Wright;Juliet Biggs
影响因子：
3
作者：
W. Prescott
通讯作者：
W. Prescott
影响因子：
5.3
作者：
E. Carminati;M. Wortel;P. Meijer;R. Sabadini
通讯作者：
E. Carminati;M. Wortel;P. Meijer;R. Sabadini
影响因子：
1.6
作者：
Ming-San Yang;Kwo-Hwa Chen;Shyang Wen Shiao
通讯作者：
Ming-San Yang;Kwo-Hwa Chen;Shyang Wen Shiao