[1] We present the first use at a mid-ocean ridge of a recently developed broadband marine magnetotelluric (MT) instrument. The extended high frequency performance of the instrument allows resolution of electrical resistivity structure at shallower depths than traditional marine MT sensors. Our two-dimensional inversion model from data collected at four MT sites on the East Pacific Rise (EPR) a...

Continent–continent collisions are an important tectonic process and have played a fundamental role in the evolution of the modern continents. A combination of geological and geophysical data has provided new constraints on the structure and temporal evolution of these orogens. Magnetotelluric (MT) studies have been an important part of these studies since they can constrain the fluid content a...

Introduction. Electromagnetic (EM) sounding has been widely used to reveal earth structure from depths of meters to hundreds of kilometers [e.g. 1-5] and has also probed the deep interiors of the Moon [e.g. 6-9] and the Galilean satellites [10]. The mag-netotelluric method [MT: 11,12] enables natural-source soundings from a single platform, without any external measurements or prior knowledge a...

where E,, E, and If,, H, represent electric and magnetic components measured along two orthogonal axes (in this paper, for simplicity, to be north and east, respectively). The elements ;,, comprise the magnetotelluric impedance tensor, and they are generally complex due to phase differences between the electric and magnetic fields. All quantities in equation (I ) are frequency dependent. For th...

We have developed a linearized algorithm to invert noisy 2-D magnetotelluric data for subsurface conductivity structures represented by smooth boundaries defining sharp resistivity contrasts. We solve for both a fixed number of subsurface resistivities and for the boundary locations between adjacent units. The boundary depths are forced to be discrete values defined by the mesh used in the forw...

magnetotellurics (mt) is a geophysical passive technique for exploring geothermal reservoirs. it utilizes a broad spectrum of natural geomagnetic fields for electromagnetic induction in the earth. this method is also preferred over dc-resistivity methods, particularly where the exploration of subsurface deep aquifers is considered. the role of mt method in the exploration of geothermal reservoi...

ZTEM refers to the Z-axis tipper electromagnetic method. The method is an airborne magnetotelluric sounding based on difference in rocks’ resistivity using native field. effective exploring large-scale structures when ground fluctuant. paper introduces inversion algorithm of 2D named conjugate gradient This method, which avoids solving Jacobi matrix, very but not enough model divided into a big...