F Hamzeh; SH Shafiei Bafti
Abstract
One of the most basic problems in the exploration and extraction of the ornamental stones quarries is the recognition and modeling of the discontinuities. Generally, in the most of the ornamental stones quarries, analysis of the discontinuities is not considered. This study is dealt with the discontinuities ...
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One of the most basic problems in the exploration and extraction of the ornamental stones quarries is the recognition and modeling of the discontinuities. Generally, in the most of the ornamental stones quarries, analysis of the discontinuities is not considered. This study is dealt with the discontinuities analysis in the limestone outcrops. The Kerman ornamental stones quarries are located at the Cretaceous limestone. Geological study shows a development of lineaments due to effect of two faults systems. Normal faults have a dominated feature and cause an intensive fracturing in the ornamental stones quarries. In order to analysis of the lineaments, ETM+ image was filtered by use of ENVI software in the orientations of 45,90 and 315 degree and then with use of ArcMap software ,characteristics of discontinuities(e.g. orientation , length, intersection and number of lineaments) have identified in GIS, and map of lineaments density was prepared for each outcrop. The comparison of lineaments characteristic in GIS and field observation reveals a high coincidence between two method . The results of this study show an intensive fracturing in the outcrops. It is concluded that most of outcrops show a high risk for extraction.
SH. Shafiei Bafti; S.A. Alavi; M. Mohajjel
Abstract
Faryab area at the southeastern part of the Sanandaj-Sirjan zone, containing the Paleozoic rocks in the internal part of Zagros Orogen, displays two folding episodes through a progressive deformation event. Axial planes of recumbent F1 folds dip moderately to the north and the ...
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Faryab area at the southeastern part of the Sanandaj-Sirjan zone, containing the Paleozoic rocks in the internal part of Zagros Orogen, displays two folding episodes through a progressive deformation event. Axial planes of recumbent F1 folds dip moderately to the north and the axes also plunge moderately to NW - SW. F1 folds were generated in a flexural-flow condition in whole lithological units. Thrust faults were produced along the overturned limbs of the F1 folds. These thrusts are most abundant in the central domain, the north of Zartorosht Au-index. At the southern edge of the central domain, displacement of large slabs of calcschist with interbedded marble were produced by these thrust faults.
Overturned limbs were cut by ductile shear zones of thrusts and development of green-schist facies in these shear zones implying the medium dips for thrusting. F2 folds were developed by co-axially refolding of F1 that are well exposed in Pasefid, Zartorosht and Zehmakan anticlines. Structural data shows the variation of F2 axis between S45W - N80W directions. Interference patterns of Z on S, M on S and S on S indicate coaxial refolding F1 by F2 (Hook Type).