Shallow Crustal Structure of Lake Van and Its Surroundings with WGM2012 Bouguer Gravity Data Van Gölü ve Civarının Sığ Kabuk Yapısının WGM2012 Bouguer Gravite Verileriyle İncelenmesi


ELMAS A.

Jeoloji Muhendisligi Dergisi, vol.46, no.1, pp.41-50, 2022 (Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 46 Issue: 1
  • Publication Date: 2022
  • Doi Number: 10.24232/jmd.1138849
  • Journal Name: Jeoloji Muhendisligi Dergisi
  • Journal Indexes: Scopus, Academic Search Premier, Geobase
  • Page Numbers: pp.41-50
  • Keywords: First Vertical Derivative, Structural Discontinuity, Tilt Angle, Total Horizontal Derivative, Van Lake
  • Karadeniz Technical University Affiliated: Yes

Abstract

© 2022, TMMOB Chamber of Geological Engineers. All rights reserved.Using the Bouguer gravity data obtained from the World Gravity Map (WGM2012), the shallow crustal structure of Van Lake and its vicinity has been studied in this study. In this context, it is aimed to investigate the lateral boundaries of the geological units of the region by applying total horizontal derivative and tilt angle methods to the vertical derivative values ​of the gravity data. The maximum amplitude values ​of the total horizontal derivative and zero amplitude values ​of the tilt angle were used to reveal the horizontal boundaries. In addition to the similarity between 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 with the amplitude spectrum in the study area. In addition, with the inverse solution, the basement topography of the region was calculated and mapped. As a result of the amplitude spectrum calculation, the average depths of soft/hard sediment, basement and Conrad interfaces were determined as 3.1 km, 6.2 km and 14.4 km, respectively. In addition to the determination of the mass boundaries that present a density difference, it has been calculated that the depth values of the basement topography vary between 5.6 and 6.7 km with the inverse solution.