Study of Extension and maGmatism in Malawi aNd Tanzania

This experiment will acquire a family of geophysical, geochemical and geological observations in and around northern Lake Malawi to test fundamental hypotheses regarding continental rupture. Together, these data will allow us to characterize extensional deformation and magmatism at depth in the crust, mantle lithosphere and upper asthenosphere. These include seismic reflection data, onshore/offshore wide-angle seismic reflection/refraction data, passive seismic data (including body waves and surface waves), seismicity, long-period and wide-band MT data, continuous GPS data, InSAR data, and geochemical data. The IRIS PASSCAL component consists of 40 BB stations and 16 IP stations deployed for a period of 18 months.

本实验将在马拉维湖北部及其周边区域获取一系列地球物理、地球化学及地质观测数据，以验证关于大陆破裂的基础假说。这些数据将共同助力我们刻画地壳、岩石圈地幔及软流层上部深处的伸展变形与岩浆活动特征。数据类型涵盖地震反射数据、海陆广角地震反射/折射数据、被动地震数据（含体波与面波）、地震活动性数据、长周期与宽频带大地电磁（MT）数据、连续GPS数据、干涉合成孔径雷达（InSAR）数据及地球化学数据。IRIS PASSCAL部分包含40个宽频带（BB）台站与16个短周期（IP）台站，部署时长为18个月。