Acquisition of a Unique Onshore/Offshore Geophysical and Geochemical Dataset in the Northern Malawi (Nyasa) Rift
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Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
Seismological Research Letters
Abstract
The Study ofExtension andmaGmatism inMalawi aNdTanzania
(SEGMeNT) project acquired a comprehensive suite of geophysical
and geochemical datasets across the northern Malawi (Nyasa) rift
in the East Africa rift system. Onshore/offshore active and passive
seismic data, long-period and wideband magnetotelluric data, continuous
Global Positioning System data, and geochemical samples
were acquired between 2012 and 2016. This combination of data
is intended to elucidate the sedimentary, crustal, and upper-mantle
architecture of the rift, patterns of active deformation, and the
origin and age of rift-related magmatism. A unique component
of our program was the acquisition of seismic data in LakeMalawi,
including seismic reflection, onshore/offshore wide-angle seismic
reflection/refraction, and broadband seismic data from lake-bottom
seismometers, a towed streamer, and a large towed air-gun source.