Latest Research on Aeromagnetic Data: Dec – 2019

STATISTICAL MODELS FOR INTERPRETING AEROMAGNETIC DATA

A mathematical basis for the applying of power qualitative analysis to aeromagnetic map interpretation is developed. Associate in Nursing ensemble of blocks of variable depth, width, thickness, and magnetization is taken into account as a applied mathematics model. With the employment of the elemental postulate of natural philosophy, a formula which might be accustomed Associate in Nursingalyze the ability spectrum of an aeromagnetic map is developed. The influences of horizontal size, depth, thickness, and depth extent of the blocks on the form of the ability spectrum ar assessed. Examples that embody power spectra of maps from North American country and Central America demonstrate the applying of the approach. within the cases studied a double ensemble of blocks seems to best justify the discovered power spectrum characteristics. [1]

Simple Micro-Levelling for Aeromagnetic Data

A simple technique is delineate for removing residual levelling errors from aeromagnetic knowledge. These residual errors have a definite spectral signature and square measure simply aloof from a grid of the info mistreatment existing directional grid-filtering ways. The filtered grid is then wont to correct the placed knowledge. the strategy cannot distinguish between levelling errors and real elongate anomalies parallel to the flight-line direction. It ought to thus be used by selection. [2]

Mapping Basement Magnetization Zones from Aeromagnetic Data in the San Juan Basin, New Mexico

Two new techniques ar used in analysis of aeromagnetic information from the metropolis basin, New Mexico, to reinforce the expression of buried basement structure and lithology: (1) the info ar analytically continuing downward onto the irregular basement surface so as to cut back the result of variable depth to basement, and (2) magnetization boundaries ar painted by a linear filter supported the gradient of pseudogravity. Reduction to the basement involves 3 procedures that, together, give a sensible technique for continuation of potential fields between general surfaces. information ar continuing from the nonlevel flight-elevation surface onto A level surface (drape-to- level continuation) by suggests that of a system of sequential approximations supported growth of a Taylor series. [3]

Fingerprinting Proterozoic Bedrock in Interior Wilkes Land, East Antarctica

Wilkes Land in East Antarctic continent remains one among the last earth science exploration frontiers on Earth. Hidden at a lower place kilometres of ice, its bedrock preserves a poorly-understood tectonic history that mirrors that of southern Australia and holds essential insights into past supercontinent cycles. Here, we tend to use new and recently revealed Australian and Antarctic earth science and geology knowledge to gift a completely unique interpretation of the age and character of crystalline basement and matter cowl of interior geographical area. [4]

Interpretation of High Resolution Aeromagnetic Data to Estimate the Curie Point Depth Isotherm of Parts of Middle Benue Trough, North-East, Nigeria

This analysis work deals with estimation of Curie temperature depth isopleth victimization aeromagnetic information of a part of middle Benue Trough, North-East, Nigeria. The study space lies inside the line of longitude nineºE – 10ºE and Latitude 8ºN – 9.50ºN with associate calculable total space of 18150km2. Regional/Residual separation was performed on the overall magnetic field strength victimization polynomial fitting. The residual map was divided into fourteen spectral blocks and therefore the log of spectral energies were planned against frequency. center of mass depth and depth to prime boundary obtained were accustomed estimate the Curie temperature depth isopleth that is that the depth at that the crust and top mantle magnetic materials stop to be magnetic as a results of increase in temperature as depth will increase. [5]

Reference

[1] Spector, A. and Grant, F.S., 1970. Statistical models for interpreting aeromagnetic data. Geophysics, 35(2), (Web Link)

[2] Minty, B.R.S., 1991. Simple micro-levelling for aeromagnetic data. Exploration Geophysics, 22(4), (Web Link)

[3] Cordell, L. and Grauch, V.J.S., 1985. Mapping basement magnetization zones from aeromagnetic data in the San Juan Basin, New Mexico. In The utility of regional gravity and magnetic anomaly maps (pp. 181-197). Society of Exploration Geophysicists. (Web Link)

[4] Fingerprinting Proterozoic Bedrock in Interior Wilkes Land, East Antarctica
Alessandro Maritati, Jacqueline A. Halpin, Joanne M. Whittaker & Nathan R. Daczko
Scientific Reports volume 9, (Web Link)

[5] Aliyu, A., Salako, K. A., Adewumi, T. and Mohammed, A. (2018) “Interpretation of High Resolution Aeromagnetic Data to Estimate the Curie Point Depth Isotherm of Parts of Middle Benue Trough, North-East, Nigeria”, Physical Science International Journal, 17(3), (Web Link)

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