SUBSURFACE STRUCTURE OF BATURAGUNG ESCARPMENT REVEALED THROUGH THREE-DIMENSIONAL GRAVITY INVERSION

Authors

  • Selvi Misnia Irawati Geophysical Engineering, Institut Teknologi Sumatera, Indonesia
  • Alutsyah Luthfian School of Environment, Auckland University, New Zealand
  • Agus Laesanpura Geophysical Engineering, Institut Teknologi Bandung, Indonesia

DOI:

https://doi.org/10.23960/jge.v7i1.125

Keywords:

Baturagung Escarpment, gravity, inverse modeling, SimPEG

Abstract

Baturagung Escarpment is an essential tectonic element of Java Island because it represents a transition from the Southern Mountain Block to the Kendeng Basin. This study has succeeded in producing a three-dimensional model of the Baturagung Escarpment subsurface using gravity anomaly data. The data are distributed along a regional scale transect, whose resolving capability has been tested using a checkerboard test. Our proposed geophysical model can fit the observed data very well, with a 0.77% RMS error. This model exhibits a structural depression bounded by high basement blocks below the Baturagung Escarpment, one of the basement block outcrops at Jiwo Hills. The maximum width of the depression is 10 km, with a depth exceeding 3 km in some places. The depression might be formed because of an extensional tectonic regime that prevailed during the Palaeogene, followed by volcanic arc loads' emplacement up to the early Miocene.

Author Biography

Selvi Misnia Irawati, Geophysical Engineering, Institut Teknologi Sumatera

Lecturer Geophysical Engineering Institut Teknologi Sumatera

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Published

2021-03-19

How to Cite

Irawati, S. M., Luthfian, A., & Laesanpura, A. (2021). SUBSURFACE STRUCTURE OF BATURAGUNG ESCARPMENT REVEALED THROUGH THREE-DIMENSIONAL GRAVITY INVERSION. JGE (Jurnal Geofisika Eksplorasi), 7(1), 17–29. https://doi.org/10.23960/jge.v7i1.125

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Vol. 7 No. 1 (2021)

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