Jeoloji Münendisliği Dergisi

Shallow Crustal Structure of Lake Van and Its Surroundings with WGM2012 Bouguer Gravity Data

Abstract: Using the Bouguer gravity data obtained from the World Gravity Map (WGM2012), the shallow crustalstructure of Van Lake and its vicinity has been studied in this study. In this context, it is aimed to investigate thelateral boundaries of the geological units of the region by applying total horizontal derivative and tilt angle methodsto the vertical derivative values of the gravity data. The maximum amplitude values of the total horizontal derivativeand zero amplitude values of the tilt angle were used to reveal the horizontal boundaries. In addition to the similaritybetween the results of this study and the results of previous studies, new discontinuity boundaries were determined.In addition, the average depths of the soft/hard sediments, basement and Conrad topographies were calculated withthe amplitude spectrum in the study area. In addition, with the inverse solution, the basement topography of theregion was calculated and mapped. As a result of the amplitude spectrum calculation, the average depths of soft/hardsediment, basement and Conrad interfaces were determined as 3.1 km, 6.2 km and 14.4 km, respectively. In additionto the determination of the mass boundaries that present a density difference, it has been calculated that the depthvalues of the basement topography vary between 5.6 and 6.7 km with the inverse solution.