WRENCH TECTONICS, DETACHMENT FAULTS, RIEDEL AND DUCTILE SHEARS VIS -A- VIS SEISMOGENESIS OF THE CIMMERIAN PLATE

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ALARN KHAN A.; AKHTER S.H.

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Journal: Journal of the Earth and Space Physics Year:2001 | Volume:27 | Issue:1 Page(s): 21-31

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Title

WRENCH TECTONICS, DETACHMENT FAULTS, RIEDEL AND DUCTILE SHEARS VIS -A- VIS SEISMOGENESIS OF THE CIMMERIAN PLATE

Author(s)

ALARN KHAN A. | AKHTER S.H. | Issue Writer Certificate

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Abstract

Cimmerian plate comprising of Anatolides, Taurides, Alborz, Central Iran, East Iran Belt (EIB), Central Afghanistan, South Pamir, Pontides and Lesser Caucasus blocks, are tectogenetically associated with wrenching, detachment faults and Riedel shears. Among the blocks those affected by wrench tectonics, detachment faults and Riedel shears are seismically very active. In addition, the Central Iran Block and East Iran Belt are attributed to ductile shear zones those behave as counter - flow boundaries of pseudoplastic power law fluids responsible for all seismic activities. East Iran Belt played the most important role of counter-flow boundaries for pseudoplastic power law fluids during intra - plate convergence and cal alkaline granitoid plutonic phases in the Central Afghanistan back arc basin block. Two major detachment fault zones viz., Makran Detachment Fault Zone (MDFZ) and South Iran Detachment Fault Zone (SIDFZ) have been inferred. MDFZ seems to be less active while SIDFZ is more active. The on-going activity of SIDFZ is envisaged by the deformation of Neogene sediments and by the occurrence of extensive salt beds those act as the lubricating agent for decollement. The detachment fault activities all along the intra-arc basin, arc proper and fore-arc basin zones of Zagros Orogen are also responsible for wrenching and Riedel shears (conjugate fracture). The northeast - southwest trending shears are inferred to be seismic prone. The wrenching is dominantly right-lateral strike slip with thrust.

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APA: Copy

ALARN KHAN, A., & AKHTER, S.H.. (2001). WRENCH TECTONICS, DETACHMENT FAULTS, RIEDEL AND DUCTILE SHEARS VIS -A- VIS SEISMOGENESIS OF THE CIMMERIAN PLATE. JOURNAL OF THE EARTH AND SPACE PHYSICS, 27(1), 21-31. SID. https://sid.ir/paper/80393/en

Vancouver: Copy

ALARN KHAN A., AKHTER S.H.. WRENCH TECTONICS, DETACHMENT FAULTS, RIEDEL AND DUCTILE SHEARS VIS -A- VIS SEISMOGENESIS OF THE CIMMERIAN PLATE. JOURNAL OF THE EARTH AND SPACE PHYSICS[Internet]. 2001;27(1):21-31. Available from: https://sid.ir/paper/80393/en

IEEE: Copy

A. ALARN KHAN, and S.H. AKHTER, “WRENCH TECTONICS, DETACHMENT FAULTS, RIEDEL AND DUCTILE SHEARS VIS -A- VIS SEISMOGENESIS OF THE CIMMERIAN PLATE,” JOURNAL OF THE EARTH AND SPACE PHYSICS, vol. 27, no. 1, pp. 21–31, 2001, [Online]. Available: https://sid.ir/paper/80393/en

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