Reconciling patterns of long-term topographic growth with coseismic uplift by synchronous duplex thrusting.
Reconciling patterns of long-term topographic growth with coseismic uplift by synchronous duplex thrusting.
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DOI：
10.1038/s41467-023-43994-6
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发表时间：
2023-12-06
影响因子：
16.6
通讯作者：
Hu, Xiu
中科院分区：
文献类型：
--
作者：
Zhang, Yuqing;Chen, Hanlin;Shi, Xuhua;Almeida, Rafael;Walker, Richard;Lin, Xiubin;Cheng, Xiaogan;Deng, Hongdan;Chen, Zhuxin;Hu, Xiu
地表地形的长期变化如何与同震隆升相关，是理解沿沿着活跃山脉前缘高海拔形成的关键，至今仍有激烈的争论。在这里，我们研究了这种联系，通过模拟生长地层的发展和褶皱的河流阶地以上皮山双重系统在塔里木盆地南部。我们发现，同步双重逆冲的两个相邻的断层不同的滑动速率，与序列传播的皮山逆冲断层系统，需要解释的存在下，相反倾斜面板的生长地层的双重前，和盆地向迁移的阶地褶皱波峰。重要的是，这种双重构造内的同步逆冲过程调和了阶地褶皱在1000 - 1- 1亿年时间尺度上的变形与2015年皮山6.4级地震在前缘逆冲上的最大同震抬升之间的差异。这些结果表明，不同时间尺度上的地形失配可以反映断裂系统的长期运动学演化。因此，我们的研究强调了表征复杂地下断层运动学对于研究地形生长的重要性，并促使人们重新思考全球活动褶皱冲断带中从短期到长期时间尺度的造山过程。由于变形模式的不匹配，解读长期地形增长和暂时地震抬升之间的关系具有挑战性。Zhang等人介绍了一种新的模型来解决这个高度激烈争论的差异。
How long-term changes in surface topography relate to coseismic uplift is key to understanding the creation of high elevations along active mountain fronts, and remains hotly debated. Here we investigate this link by modeling the development of growth strata and the folding of river terraces above the Pishan duplex system in the southern Tarim Basin. We show that synchronous duplex thrusting of two neighboring faults with varying slip rates, associated with in-sequence propagation of the Pishan thrust system, is required to explain the presence of opposite-dipping panels of growth strata on the duplex front, and basinward migration of terrace fold crests. Importantly, this process of synchronous thrusting within the duplex reconciles the discrepancy between the deformation of terrace folds at the 10−1–100 million-year timescale and the maximum coseismic uplift of the 2015 Mw 6.4 Pishan earthquake on the frontal thrust. These results suggest that topography mismatch at different time scales can reflect the long-term kinematic evolution of fault systems. Thus, our study highlights the importance of characterizing complex subsurface fault kinematics for studying topographic growth, and motivates rethinking of the mountain building process in worldwide active fold-and-thrust belts, from short-term to long-term timescales. Deciphering the relationship between prolonged topographic growth and temporary earthquake uplift is challenging due to the mismatch in their deformation patterns. Zhang et al. introduce a novel model to address this highly hotly-debated discrepancy.
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青藏高原北部西昆仑隆起，上地壳脆性增厚为主
影响因子：
5.8
作者：
Jiang, Xiaodian;Li, Zheng-Xiang;Li, Haibing
通讯作者：
Li, Haibing
影响因子：
3.1
作者：
Chen, Hanlin;Zhang, Yuqing;Yang, Shaomei
通讯作者：
Yang, Shaomei
DOI：
10.1029/jb093ib11p13307
发表时间：
1988-11-10
期刊：
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS
影响因子：
--
作者：
KING, GCP;STEIN, RS;RUNDLE, JB
通讯作者：
RUNDLE, JB
影响因子：
18.3
作者：
Elliott, J. R.;Jolivet, R.;Stevens, V. L.
通讯作者：
Stevens, V. L.
影响因子：
3.1
作者：
Jadoon, Saif-Ur-Rehman K.;Ding, Lin;Idrees, Muhammad
通讯作者：
Idrees, Muhammad