GEOMETRY AND KINEMATIC ANALYSIS OF LANIZ STRUCTURAL SUB-ZONE; EVIDENCE FOR STRUCTURAL EVOLUTION OF SOUTH CENTRAL ALBORZ RANGE

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YASAGHI ALI; ABASSI A.R.

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Journal: GEOSCIENCES Year:2005 | Volume:14 | Issue:56 Page(s): 152-167

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Title

GEOMETRY AND KINEMATIC ANALYSIS OF LANIZ STRUCTURAL SUB-ZONE; EVIDENCE FOR STRUCTURAL EVOLUTION OF SOUTH CENTRAL ALBORZ RANGE

Author(s)

YASAGHI ALI | ABASSI A.R. | Issue Writer Certificate

Keywords

GEOMETRY AND KINEMATICS OF FAULTQ4

FAULT RELATED FOLDQ4

STRUCTURAL SUB-ZONEQ4

TRANSGRESSION TECTONICSQ2

STRUCTURAL EVOLUTION OF CENTRAL ALBORZQ4

Abstract

Laniz STRUCTURAL SUB-ZONE, located between Ahar-Maygoon faults in north and Imamzad-e-Davood fault in south, is one of the STRUCTURAL SUB-ZONEs in the south of Central Alborz range. In this paper, an intial model is presented on structural evolution of the Laniz sub-zone as one of the south Central Alborz range sub-zones. This model is based on geometry, kinematics, and strain analysis of the structures. The model can also be used as a reference frame to interpret structural evolution of the south Central Alborz range. Field mapping accompanied by structural interpretation of the study area shows that thrust faults with minor strike component that dip towards north and south, are the main structures that control deformation in the sub-zone. The geometry of these thrust faults is similar to the geometry of Pop-up structures in which the older rocks are exposed and well developed in all STRUCTURAL SUB-ZONEs of the range. Hanging wall anti forms and footwall synforms accompany all these thrust faults. These folds are asymmetric and their geometric and kinematic analysis show that they were developed by propagation of thrust faults. Therefore, they were classified as fault propagation folds. These thrust faults were disrupted and translated by almost north-south trending transverse faults with greater strike slip component. Furthermore, these faults that also caused passive rotation of the thrust-related folds are interpreted as the result of interaction between Alborz range arid Caspian Sea oceanic floor basin in Late Tertiary. This caused compressional and thrust tectonics to be substituted by transpressional tectonic regim in the south Central Alborz range. The very low values of measured strain on samples along the fault zones indicate that this tectonic regim is of the thin-skinned one.

Cites

THRUST MECHANISM OF NORTH LIMB OF GARMABDAR ANTICLINE (CENTRAL ALBORZ)

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APA: Copy

YASAGHI, ALI, & ABASSI, A.R.. (2005). GEOMETRY AND KINEMATIC ANALYSIS OF LANIZ STRUCTURAL SUB-ZONE; EVIDENCE FOR STRUCTURAL EVOLUTION OF SOUTH CENTRAL ALBORZ RANGE. GEOSCIENCES, 14(56), 152-167. SID. https://sid.ir/paper/32622/en

Vancouver: Copy

YASAGHI ALI, ABASSI A.R.. GEOMETRY AND KINEMATIC ANALYSIS OF LANIZ STRUCTURAL SUB-ZONE; EVIDENCE FOR STRUCTURAL EVOLUTION OF SOUTH CENTRAL ALBORZ RANGE. GEOSCIENCES[Internet]. 2005;14(56):152-167. Available from: https://sid.ir/paper/32622/en

IEEE: Copy

ALI YASAGHI, and A.R. ABASSI, “GEOMETRY AND KINEMATIC ANALYSIS OF LANIZ STRUCTURAL SUB-ZONE; EVIDENCE FOR STRUCTURAL EVOLUTION OF SOUTH CENTRAL ALBORZ RANGE,” GEOSCIENCES, vol. 14, no. 56, pp. 152–167, 2005, [Online]. Available: https://sid.ir/paper/32622/en

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