Joint inversion of teleseismic receiver functions and magnetotelluric data using a genetic algorithm:
Are seismic velocities and electrical conductivities compatible?
Moorkamp, M., A.G. Jones and D.W. Eaton
Joint inversion of different kinds of geophysical data has the potential to improve model resolution,
under the assumption that the different observations are sensitive to the same subsurface features.
Here, we examine the compatibility of P-wave teleseismic receiver functions and long-period magnetotelluric
(MT) observations, using joint inversion, to infer one-dimensional lithospheric structure. We apply a
genetic algorithm to invert teleseismic and MT data from the Slave craton; a region where previous
independent analyses of these data have indicated correlated layering of the lithosphere. Examination of
model resolution and parameter trade-off suggests that the main features of this area, the Moho,
Central Slave Mantle Conductor and the Lithosphere-Asthenosphere boundary, are sensed to varying degrees
by both methods. Thus, joint inversion of these two complementary datasets can be used to construct
improved models of the lithosphere. Further studies will be needed to assess whether the approach can be
Geophysical Research Letters, 34, L16311, doi: 10.1029/2007GL030519, 2007.
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Alan G Jones / 15 September 2007 /