Sahar Ebadi

University of Tehran | UT · Department of Surveying and Geomatics Engineering

This research aims to define the depth of Moho in Iran by collocation method using gravimetric data with seismic information. The definition of the Moho in the Iranian region is of considerable importance due to the geological complexity of the area also characterized by tectonic and orogenic events of particular uniqueness. We applied the collocat...

The complexity of geological units in Iran because of several unique events like tectonics and orogenic activities in this region led to extensive investigations for Moho recovery by seismic methods therein. In this research, three gravimetric methods have been evaluated by some point-wise seismic data. We applied collocation method as an iterative...

In this study, two gravity-inversion-based methods of estimating the Moho discontinuity are employed over Iran which is characterized by a rough topography with a complex geological structure. The first method is a modified form of Jeffrey theory of isostasy for the second-order radial derivative of gravitational potential, measured from the Gravit...

The Moho interface known as the Mohoroviči´Mohoroviči´c discontinuity represents the boundary between the lowermost crust and the underlying uppermost mantle. We try to recovery Moho by using the isostatic hydrostatic and flexural equilibrium. Hydrostatic equilibrium is based on floating crust on the mantle and flexural model is according to flexur...

One of the major issues associated with a regional Moho recovery from the gravity or gravity-gradient data is the optimal choice of the mean compensation depth (i.e., the mean Moho depth) for a certain area of study, typically for orogens characterised by large Moho depth variations. In case of selecting a small value of the mean compensation depth...

In this paper, three independent Earth gravity models (EGMs) of GO_CONS_GCF_2_TIM_R4, AIUB-GRACE03S and ULux_CHAMP2013s are combined to degree and order of 120. The geoid models of these EGMs are computed and compared with the Global Positioning System (GPS) and levelling data over Fennoscandia. We found that the simple mean of these geoid models i...

In this paper an estimator for geoid is presented and applied for geoid computation which considers the topographic and atmospheric effects on the geoid. The total atmospheric effect is mathematically developed in terms of spherical harmonics to degree and order 2,160 based on a recent static atmospheric density model. Also the contribution of its...