Geological structure modeling derived from gravity data at the Purwodadi mud volcano complex, Central Java, Indonesia Ardian Novianto, Wahyu Hidayat, Bambang Bintarto, Ghiffari Aulia Adzli Sadi Utomo, Muhammad Asslam Ridho
Geophysical Engineering Department, Faculty of Mineral and Energy Technology, UPN Veteran Yogyakarta, Yogyakarta, Indonesia
Petroleum Engineering Department, Faculty of Mineral and Energy Technology, UPN Veteran Yogyakarta, Yogyakarta, Indonesia
Abstract
We present a subsurface geological model of the Purwodadi mud volcano complex. This study focuses on understanding the structural development and tectonic evolution to provide insights into the occurrence and formation of mud volcanoes within the Purwodadi region. By analyzing the subsurface geological structure and density variations using gravity data, the study aims to elucidate the underlying factors and processes that have shaped the Purwodadi mud volcano complex. The analysis of the subsurface structure is informed by Euler deconvolution techniques and 2.5-dimensional gravity modeling. The data used in this study is high-resolution gravity data collected across the Purwodadi mud volcano complex in Central Java, Indonesia. This high-quality gravity data provides detailed information about the subsurface geological structure and density variations within the study area. The 2.5D gravity model suggests two distinct tectonic episodes that have shaped the geological structure of the Purwodadi mud volcano complex. Initially, a strain phase led to the formation of syn-rift deposits, as the region underwent extensional tectonics. This was then followed by a compressional tectonic regime, which generated thrust faults and the development of a fold-thrust belt system. These two dominant fault systems exhibit a predominantly west-east orientation, reflecting the overall tectonic evolution of the study area.
