南里维拉板块与哈利斯科地块俯冲带的地震结构
Seismic structure of the southern Rivera plate and Jalisco block subduction zone
AI总结：
本研究利用多类地震与测深数据，揭示了南里维拉板块以12-14度倾角俯冲于哈利斯科地块之下，并提供了增生楔及地壳上地幔的新地震图像。
摘要：
墨西哥太平洋海岸的结构和构造特征在哈利斯科地块（JB）区域产生了高水平的 seismic 活动，使其成为全球最具吸引力的地球物理研究区域之一。里维拉-北美接触带近年来已成为 TsuJal 项目框架内不同构造研究的对象。迄今为止，该项目已产生了众多关键的地球物理结果，显著增进了我们对这一地区的理解。我们的研究聚焦于 JB 南部与里维拉板块（RP）之间的相互作用，该相互作用横跨中美洲海沟。我们还覆盖了一条长 130 公里的海陆联合剖面，从东部里维拉断裂带延伸至哈利斯科州的拉韦尔塔地区。为表征该区域，我们解释了广角地震、多道地震和多波束测深数据。这些结果与哈利斯科地震加速度遥测网络及里维拉俯冲带测绘实验记录的局部和区域地震活动相结合，为南部 RP 的几何形态提供了新见解，该板块在东北-西南方向以 12-14 度的倾角俯冲于 JB 之下。此外，我们的结果提供了沿该剖面的增生楔、浅部地壳、深部地壳和上地幔结构的新地震图像。
英文摘要：
Structural and tectonic features in the Pacific Coast of Mexico generate a high level of seismic activity in the Jalisco block (JB) region, making it one of the most attractive areas of the world for geophysical investigations. The Rivera North America contact zone has been the object of different tectonic studies in recent years framed within the TsuJal project. To this day, this project is generating numerous crucial geophysical results, which significantly improve our understanding of the region. Our study is focused on the interaction between the south of the JB and Rivera plate (RP), which crosses the Middle America trench. We also cover an offshore onshore transect of 130 km length between the eastern Rivera fracture zone and La Huerta region, in the Jalisco state. To characterize this region,we interpreted wide angle seismic, multichannel seismic, and multibeam bathymetry data. The integration of these results, with the local and regional seismicity recorded by the Jalisco Seismic Accelerometric Telemetric Network and by the Mapping the Rivera Subduction Zone experiment, provides new insights into the geometry of the southern RP, which is dipping 12 14 degrees under the JB in the northeast southwest direction. Moreover, our results provide new seismic images of the accretionary wedge, the shallow crust, the deep crust, and the upper-mantle structure along this profile.
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