Scientific Quarterly Journal of Geosciences

Current Issue

By Issue

By Author

By Subject

Author Index

Keyword Index

About Journal

Aims and Scope

Editorial Board

Editorial Staff

Publication Ethics

Related Links

FAQ

Peer Review Process

News

Reviewer in 2021

Publons Link

Regulations for determining the cost of article processing in open access scientific journals

The Geometric and Kinematic Analysis of Soltan Anticline in Zagros Fold-Thrust Belt; An Evaluation of the Dehram Group Closure

Document Type : Original Research Paper

Authors

1 Department of Geology, Tarbiat Modares University, Tehran, Iran

2 Exploration management, National Iranian Oil Company, Tehran, Iran

Abstract

       Soltan anticline is located in northwest of the Zagros fold-thrust belt in the LorestanProvince. Geometric and kinematic analyses of the anticline have been carried out to estimate the closure of the Dehram Group in order to evaluate its potential for gas reservoirs. Geometric analyses of the Soltan anticline indicate that the fold geometry is rather similar to that of the Trishear type of fault propagation folds. However, considering the competency contrasts between various rock units in the anticline that control the fold’s geometry, together with the rounded and relatively wide outline of the anticline at surface, the Soltan anticline can also be compared to faulted detachment folds that hold the same geometry as the fault propagation folds. On the other hand, the very low values of finite strain measured on clastic rocks collected from the anticline and its typical smaller scale fold constraint, and the low values of the layer parallel shortening are comparable to the kinematics of fault propagation folds. Based on the data from the geometric and kinematic analyses, seven structural cross sections across the anticline are drawn, and  using the cross sections, a structural contour map and a 3D model for Dehram Group are constructed. The calculated values for the anticline closure prohibits this structure as an appropriate host to gas reservoirs, unless the Soltan anticline is connected to the adjacent, Rit, anticline.
 

Keywords

References
References
Dahlstrom, C.D.A., 1970- Structural geology in the eastern margin of the Canadian Rocky Mountains. Bulletin of Canadian Petroleum Geology, V. 18, 332-406.
Dittmar, D., 1994-  Strain partitioning across a fold and thrust belt: the Rhenish Massif, Mid-European Variscides. J. Struct. Geol. 16 (10), 1335-1352.
Dunnet, D., 1969-  A technique of finite strain analysis using elliptical particles. Tectonophysics 7,117-136.
Erslev, E.A. & Mayborn, K.R., 1997- Multiple geometries and modes of fault-propagation folding in the Canadian thrust belt. Journal of Structural Geology, V. 19, 321-335.
Erslev, E.A., 1988- Normalized center-to-center strain analysis of packed aggregates. Journal of Structural Geology, 10(2), 201-209.
Harrison, J.C. & Bally, A.W., 1988- Cross sections of the Devonian to Mississippian fold belt on Melville Island, Canadian Arctic Islands, Canadian Society of Petroleum Geologists, 36, 311-332.
Hessami, K., koyi, H.A. &Talbot, C.J., 2001- The Significance of Strike-Slip Faulting in the Basement of the Zagros Fold and thrust Belt. Journal of Petroleum Geology, 24(1), 5-28.
Jamison, W.R., 1987- Geometric analysis of fold devolopment in overthrust terranes. Journal of  Structural Geology, V. 9, 207-219.
McClay, K.R., 2003- Structural geology for petroleum exploration, lecture notes., 503p.
McNaught, M.A. & Mitra G., 1993- A kinematic model for the origin of footwall synclines. Journal of Structural Geology, Vol. 15, 805-808.
McQuarrie, N., 2004- Crustal scale geometry of the Zagros fold-thrust belt, Iran. Journal of Structural Geology., Vol. 26 (3), 519-535.
Mitra, S., 1990- Fault Propagation folds: Geometry kinematic evolution and hydrocarbon traps. AAPG Bulletin, V. 74, 921-945.
Mitra, S., 2002- Fold-Accomodation Faults. AAPG Bull., 86(4), 671-693.
Mitra, S., 2002- Structural models of faulted detachment folds. AAPG Bull., 86(9), 1673-1694.
Ramsay, J.G., 1967- Folding and Fracturing of Rocks. McGrow-Hill, New York.
Rowland, S.M. & Duebendorfer, E.M., 1994- Structural analysis and synthesis 2ndEdition. Blackwell Scientific PubUcation.
Sattarzadeh, Y., Cosgrove, J.W., Vita-Finzi, C., 2000- The interplay of faulting and folding during the evolution of the Zagros deformation belt. In: Cosgrove, J.W., Ameen, M.S. (Eds.), Forced Folds and Fractures Special Publication no. 169. Geological Society, London, 187–196.
Sepehr, M., 2001- The Tectonic Significance of the Kazerun Fault Zone, Zagros Fold-Thrust Belt, Iran. Thesis Submitted for the Degree for Ph.D, University  of  London, 215 p.
Sherkati, S. & Letouzey, J., 2004- Variation of structural style and basin evolution in the central Zagros (Izeh zone and Dezful Embayment), Iran. Marine and Petroleum Geology, Vol. 21, No. 5, 535-554.
Stocklin, J., 1968- Structural histoty and tectonics of Iran: a review. AAPG Bulletin, 52, 1229-1258.
Suppe, J. & Medwedeff, D.A., 1990- Geometry and kinematics of fault-propagation folding. Eclogae Geologicae Helvetiae, V. 83, 409-454.
Thorbjornsen, K. L. & Dunne, W. M.,1997- Origin of Thrust-Related Fold: Geometric vs Kinematictests. Journal of Structural Geology, 19, 303-319.
Wallace, W.K. & Homza, T.X., 1997- Differences between fault-propagation folds and detachment folds and their subsurface implications. American Association of Petroleum Geologists Bulletin, 6, 122.
Scientific Quarterly Journal of Geosciences
Volume 18, Issue 70
February 2009
Pages 14-27
Files
Share
How to cite
Statistics