3D modelling in salt tectonic context : the Crocodile minibasin in Sivas (Turkey).

Pauline Collon and Alexandre Pichat and Océane Favreau and Gaétan Fuss and Gabriel Godefroy and Marine Lerat and Antoine Mazuyer and Marion Parquer and Guillaume Caumon and Julien Charreau and Jean-Paul Callot and Jean-Claude Ringenbach. ( 2014 )
in: Proc. 34th Gocad Meeting, Nancy, France, pages 3

Abstract

Impermeable, with a low density and acting as a viscous fluid at the geological time scale, salt plays a unique tectonic role favouring hydrocarbon trap formations. Halokinetic structures are various and difficult to image with classic seismic techniques. Thus, outcrop analogues are precious and sought after. Since the re-interpretation in September 2011 of its evaporite deposits (UPPA-TOTAL project), the Oligo-Miocene basin of Sivas (Turkey) is a new choice analogue for the study of salt tectonic with outstanding outcrops reflecting the variety of salt related structures: minibasins, diapirs, welds, canopies, glaciers, ... While studying these structures needs an important field work, building 3D models becomes an interesting way to better help understanding the three-dimensional organisation and to better assess the consistency of some conceptual interpretations. Using satellite images and dip measurements, the work presented here aims at building a 3D model of the Crocodile minibasin. Located on an ancient salt extrusion, this minibasin is filled with lacustrine and sabkha sediments. It has a closed synclinal structure on North. On its southern part, a central diapir has risen up, separating two tightened synclinals. To succeed in building this complex structural zone, a subtle combination of all recently developed techniques has been necessary: classical explicit surface patch constructions, new meshing methods and implicit approach with axial plane direction constraints. The result highlights the remarkable geometry of this salt-tectonic related structure and underlines the usefulness of new modelling methods to ease a more automated generation of such tectonic features.

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BibTeX Reference

@INPROCEEDINGS{Collon-drouaillet2014,
    author = { Collon, Pauline and Pichat, Alexandre and Favreau, Océane and Fuss, Gaétan and Godefroy, Gabriel and Lerat, Marine and Mazuyer, Antoine and Parquer, Marion and Caumon, Guillaume and Charreau, Julien and Callot, Jean-Paul and Ringenbach, Jean-Claude },
     title = { 3D modelling in salt tectonic context : the Crocodile minibasin in Sivas (Turkey). },
 booktitle = { Proc. 34th Gocad Meeting, Nancy, France },
      year = { 2014 },
     pages = { 3 },
  abstract = { Impermeable, with a low density and acting as a viscous fluid at the geological time scale, salt plays a unique tectonic role favouring hydrocarbon trap formations. Halokinetic structures are various and difficult to image with classic seismic techniques. Thus, outcrop analogues are precious and sought after. Since the re-interpretation in September 2011 of its evaporite deposits (UPPA-TOTAL project), the Oligo-Miocene basin of Sivas (Turkey) is a new choice analogue for the study of salt tectonic with outstanding outcrops reflecting the variety of salt related structures: minibasins, diapirs, welds, canopies, glaciers, ... While studying these structures needs an important field work, building 3D models becomes an interesting way to better help understanding the three-dimensional organisation and to better assess the consistency of some conceptual interpretations. Using satellite images and dip measurements, the work presented here aims at building a 3D model of the Crocodile minibasin. Located on an ancient salt extrusion, this minibasin is filled with lacustrine and sabkha sediments. It has a closed synclinal structure on North. On its southern part, a central diapir has risen up, separating two tightened synclinals.
To succeed in building this complex structural zone, a subtle combination of all recently developed techniques has been necessary: classical explicit surface patch constructions, new meshing methods and implicit approach with axial plane direction constraints. The result highlights the remarkable geometry of this salt-tectonic related structure and underlines the usefulness of new modelling methods to ease a more automated generation of such tectonic features. }
}