SH Aboutorab; A Khakzad; F Gharib; S Mehdizadeh Tehrani
Abstract
The 1:100000 sheet of Ardestan is located in the south part of 1:250000 quadrangle of Kashan at 52º to 52º, 30 E and 33º to 33º, 30N in the north west of Isfahan province and Orumieh-Dokhtarvolcanic belt.Most of the rock units' ofArdestanregion include medium to basic volcanic ...
Read More
The 1:100000 sheet of Ardestan is located in the south part of 1:250000 quadrangle of Kashan at 52º to 52º, 30 E and 33º to 33º, 30N in the north west of Isfahan province and Orumieh-Dokhtarvolcanic belt.Most of the rock units' ofArdestanregion include medium to basic volcanic and pyroclastic rocks, which are related to middle-upper Eocene volcanism phase. Intrusive rocks of this region have low-acidic to acidic combinations and belong to the shallow magmatism phase of Oligocene-Oligo Miocene and sub-volcanic activities of Pliocene. These intrusive rocks cause hydrothermal alteration and then mineralization of elements such as Cu, Mo, Au, Pb, Zn, and Fe. In this thesis, by employing the existing geological maps, systematic geochemical explorations, and known mineral indices together withthe derived information from processing of the existing airborne geophysics and satellite data (e.g. faults, hydrothermal alterations, total magnetic intensity and rock units), a number of different databases were formed.Then, by using the new weighted score method of analytic hierarchy process (AHP),these databases (also known as layers) are weighed based on the predicted genetic model of the region. These weighed layers are then modeled in the GIS system by using the index overlay method. Based on the achieved results from this study, promising area maps for Epithermal Gold is prepared.According to our field observations, sampling and laboratory analyses of the promising areas, 5areas with first priority are considered to have economical potentials and are introduced for the next phases of explorations.
P. Rajabi; I. M. Moghadam; F. Gharib
Abstract
In this study, the Sediments of Taleh-Zang Formation was investigated in South West of Khoramabad. The thickness of Taleh-Zang Formation in Qalebi section measured 200m. In this section the sediment of Taleh-Zang Formation is isoclines between Amiran Formation at the base, and Kashkan Formation at the ...
Read More
In this study, the Sediments of Taleh-Zang Formation was investigated in South West of Khoramabad. The thickness of Taleh-Zang Formation in Qalebi section measured 200m. In this section the sediment of Taleh-Zang Formation is isoclines between Amiran Formation at the base, and Kashkan Formation at the top. This Formation composed of gray limestone with chert nodules and Sandy Limestone. The study of samples taken from the studied section led to identification 28 genera and 4 species of benthonic Foraminifera and 6 genera and 2 species of green algae. The benthonic Foraminifera of the measured section were used to recognized the age of Succession and justify their correlation Based on the recognized Foraminifera such as Miscellanea miscella. The Qalebi section is Comparable to biozonation introduced by Wynd (1965). It is analogous to Miscellanea – Kathina assemblage zone (No# 43). According to distribution of the index Foraminifera, the age of the Sediments in Qalebi Section is Thanetian.
F. Gharib; Y. Lasemi; M. H. Emami
Abstract
The clastic facies of Kahar Formation were identified in the studied sections of coastal, deltaic and fluvial and also carbonate facies in shallow marine environments. The vertical displacements of Kahar Formation in these study sections show an overall major transgressive upward cycle. The petrography ...
Read More
The clastic facies of Kahar Formation were identified in the studied sections of coastal, deltaic and fluvial and also carbonate facies in shallow marine environments. The vertical displacements of Kahar Formation in these study sections show an overall major transgressive upward cycle. The petrography of plutonic and semi- plutonic igneous rocks indicate that they consist mainly of monzogabbro- diorite and in some cases, alkaline syenite. According to the results of Kahar Formation's plutonic rocks petrography and studies of related facies, the basin of this formation was a continental rift.
