Strike-slip tectonics during rift linkage
Strike-slip tectonics during rift linkage
复制标题
裂谷连接期间的走滑构造
作者：
Pagli Carolina;Yun Sang Ho;Ebinger Cynthia;Keir Derek;Wang Hua
岩浆裂谷中裂谷段连接的运动学仍有争议。来自阿法尔的应变模式提供了对当前模型的测试，以了解分段裂谷如何在早期海洋扩张地区生长。在这里，我们提出了一个综合分析的地震活动，干涉合成孔径雷达（干涉合成孔径雷达），GPS衍生的应变率图，揭示了红海和阿法尔的亚丁湾裂谷板块边界之间的联系，主要是由分布式拉伸断层。书架断层模型预测的关于垂直轴的大旋转没有被检测到。此外，应力变化和地震活动的模型，最近的堤防引起的观察到的时间-空间模式的走滑地震提供了穷人。相反，我们解释这些功能作为导致裂缝垂直剪切扩展裂缝的尖端，对拉伸较少的岩石圈终止。我们的研究结果表明，分布式伸展驱动裂谷垂直剪切，在海底扩张初期实现板块边界连接。
The kinematics of rift segment linkage in magmatic rifts remain debated. Strain patterns from Afar provide tests of current models of how segmented rifts grow in areas of incipient oceanic spreading. Here, we present a combined analysis of seismicity, interferometric synthetic aperture radar (InSAR), and GPS–derived strain rate maps to reveal that the plate-boundary linkage between the Red Sea and Gulf of Aden rifts of Afar is accommodated primarily by distributed extensional faulting. Large rotations about vertical axes predicted by bookshelf faulting models are not detected. Additionally, models of stress changes and seismicity induced by recent dikes provide poor fits to the observed time-space patterns of strike-slip earthquakes. Instead, we explain these features as resulting from rift-perpendicular shearing at the tips of spreading rifts where extension terminates against less stretched lithosphere. Our results demonstrate that distributed extension drives rift-perpendicular shearing, achieving plate-boundary linkage during incipient seafloor spreading.
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影响因子：
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作者：
C. Doubre;I. Manighetti;C. Dorbath;L. Dorbath;E. Jacques;J. Delmond
通讯作者：
C. Doubre;I. Manighetti;C. Dorbath;L. Dorbath;E. Jacques;J. Delmond
根据 InSAR 和 GPS 的 3-D 速度场反演得出的阿法尔裂谷当前板块边界变形
影响因子：
3.9
作者：
Pagli Carolina;Wang Hua;Wright Tim J.;Calais Eric;Lewi Elias
通讯作者：
Lewi Elias
影响因子：
5.8
作者：
A. Draut;P. Clift
通讯作者：
A. Draut;P. Clift
影响因子：
2.8
作者：
M. Belachew;C. Ebinger;D. Cote
通讯作者：
M. Belachew;C. Ebinger;D. Cote
影响因子：
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作者：
J. C. Savage;W. Gan;J. Svarc
通讯作者：
J. C. Savage;W. Gan;J. Svarc