Investigation of lineaments in the mid-Black arc region using Bouguer gravity data

Year 2021, Volume: 45 Issue: 2, 199 - 212, 31.12.2021

Abdurrahman Yasir Parlak Ali Elmas

https://doi.org/10.24232/jmd.1049622

Abstract

The gravity data used in this study were taken from the Earth Gravity Model (EGM08) to investigate the
crustal structure in the mid-Black arc region. In this study, geological structure boundaries that offer differences in
density were tried to determine in the mid-Black arc region. For this purpose, the possible geological structure limits
at the basement levels were especially focused on. For this reason, horizontal gradient and tilt angle techniques
were practiced to find possible geological structure limits using first vertical derivative data of the regional gravity
data of the region. The soft-hard sediment, basement, Conrad and Moho interfaces have been determined using
the radial mean amplitude spectrum of Bouguer data of study region. The topographies of these interfaces were
also presented utilizing the Parker-Oldenburg algorithm. Depth values found by inversion calculations for soft-hard
sediment, basement, Conrad and Moho interface topographies are changed as 0.7-3.5, 2.1-7.4, 9.1-14.2, and 35.1-
42.5 km, respectively. The linearities determined in the study were matched against to substantial faults of region.
It has been observed that there is a qualitative relationship between the faults, ore deposit and earthquake epicenters
in the region. The results of this practice were based on studies such as exploring the ore deposits and investigating
the risks of earthquakes in the future.

Keywords

First vertical derivative, mid-Black arc region, horizontal gradient, tilt angle, lineament

References

• Akın, U., Şerifoğlu, B.İ., Duru, M., 2011, The use of tilt angle in gravity and magnetic methods. Maden Tetkik ve Arama Dergisi, 143(143), 1-12.