Paper Information

Journal:   JOURNAL OF SCIENCE (UNIVERSITY OF TEHRAN) (JSUT)   SPRING 2007 , Volume 33 , Number 1 (SECTION: GEOLOGY); Page(s) 107 To 123.
 
Paper: 

MINERALOGY, PETROGRAPHY AND GENESIS OF JAJARM BAUXITE DEPOSIT

 
 
Author(s):  RAHIMPOUR BONAB HOSSEIN*, ESMAEILI DARYOUSH
 
* SCHOOL OF GEOLOGY, UNIVERSITY COLLEGE OF SCIENCES, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

The studied deposit is the main bauxite ore deposit in Iran, which is now being exploited. Main horizons of the Jajann bauxite deposit, which has been developed on the karst topography of the Elika formation, are composed of diaspore, silica, iron and titanium oxides. This deposit English Abstracts of Farsi Papers indicates marine regression and domination of the equatorial continental climate in this time. The most important textures in the hard bauxite horizon are micritic, pseudo-porphyric, oolitic, pisolitic and microclastic. Major diagenetic features are pisolite, oolites and some diasporic cement in microfractures. Some epigenetic processes such as decertification and resilicification have subsequently altered bauxiute ores. In many samples, presence of eroded and rounded intraclasts is indication of reworking. Seemingly, under warm climatic conditions, dominated in the early late Triassic time, weathering products of melaphyers (the early bauxite), after short-distance transportation, trapped in the karst topography on the Elika formation. Finally, bauxitization processes had completed in these karst features, which were under active circulation.

 
Keyword(s): BAUXITE, JAJANN, IRAN, MINERALOGY, DIASPORE, TEXTURE, DIAGENESIS
 
References: 
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