Summary

To study the geological structure under basalt coating

using gravity Bouguer anomalies by modern analysis

and processing methods on two profiles in Ia Don and Ia Nan communes

Phạm Nam Hưng, Cao Đình Trọng, Mai Xuân Bách,

Nguyễn Mai Phúc Lợi, Nguyễn Tiến Hóa, Cao Đình Triều

In scope of this paper, authors present a process of measuring and analyzing gravity data for construction of geological structure - density section under basalt covering in Ia Dom and Ia Nan communes, Duc district, Gia Lai province. Modern methods applied such as Wavelet transform, Euler convolution and Gravity inversion were used for setting input model to solve gravity inverse problem. Results of measuring shown that geological structure under basalt covering in Ia Dom - Ia Nan area which consist of mass (or dike/vein) and including extrusive igneous rocks of Mang Yang formation (lT₂my) with average density of 2.63 g/cm³; biotite granite of Van Canh complex (gT₂vc₃) with average density of 2.56 g/cm³; extrusive igneous rocks of Chu Prong formation (aP₂ -T₁cp) with average density of 2.73 g/cm³.

Keywords: Geological structure, basalt covering, Bouguer gravity anomaly, Wavelet transform, Euler convolution, 2D gravity inverse

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