Paper Information

Title: 

PROVENANCE OF FARYADUN CLAY DEPOSIT BASED ON GEOCHEMICAL METHODS

Type: SPEECH
Author(s): ETEMADI B.,ESLAMI AMIN*
 
 *
 
Name of Seminar: GEOLOGICAL CONGRESS
Type of Seminar:  CONGRESS
Sponsor:  IRANIAN GEOLOGICAL SOCIETY
Date:  2005Volume 9
 
 
Abstract: 

The Faryadun clay deposit is located 55 km south of Abarkoh, southeastern part of Shahr Reza-Abadeh-Hambast horstic belt. This belt is consists of many Iranian clay deposits (including Abadeh deposits). In Faryadun, clay layers are placed within a sequence of Upper Devonian shale and sandstone which layering and lithological boundaries are clearly evident.Tthe goal of this study is focussed on the genesis of Faryadun deposit based on geochemical and mineralogical data. The XRD analysis shows major minerals presents are kaolinite, quartz, illite and chlorite along with minor minerals of orthoclase, albite, goethite, paragonite, natroalunite and gypsum Ssimilar to NASC whole rock chemistry of faryadun samples shows the enrichment in SiO2 and Al2O3. A drawing of Fe + Ti vs. Cr + Nb suggests supergene provenance of Faryadun deposit. High amounts of CIA and CIW and low amounts of alkali and alkali earth elements suggest the relativly intense weathering of the felsic source rocks. The study of K/Rb ratio reveals that the most of clay sediments are precipitated in a marine sedimentary basin. Chondrite normalized REE patterns shows high LREE/HREE ratio, positive Ce anomaly and negative Eu anomaly which is similar NASC and other weathering-sedimentary clay deposits. Based on CIW and CIA, trace elements composition, REE pattern, elemental ratio and mineralogical composition, suggests the parent rock of this deposit is felsic or reworked shale with minor contributions of basic rocks.

 
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