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Malik, Khalil Ahmad (1970) A STUDY OF BAUXITE DEPOSIT IN AZAD KASHMIR. PhD thesis, University of Karachi, Karachi.



Bauxite and the associated rocks from seven different localities namely batomong and Khailla of Muzaffarabad and Khunder, Nikial, Salhun, Sawar Gunimalni and Kamroti of Kotli Tehsil in Azad Kashmir have been investigated geochemically and mineralogically Rocks in contact with the bauxite are the fire clay at the base and eocone shale at the top. The fire clay overlies the Muzaffarabad Formation of PermoCarboniferius age The bauxite (2-3 ft thick) which grades upward from poorly pisolitic to highly pisolitic from and the underlying fire clay correspond closely with each other in chemical and mineralogical composition in every locality. No relationship could be found between the solution brecoia which forms the top of Muzaffarabad Formation and the bottom of the fire clay The variations in the percentages of S102 and Al2O3 in the bauxites of the various localities are due to fluctuation in the bauxitization environment causing differential leaching and precipitation of these important components Silica and alumina concentrations have been found to work satisfactorily as indicators in studying the geochemical relationship between the bauxite and the associated rocks of the areas under study. Triangular variation diagrams of L.O.I – SiO2 – Al2O3, Sio2 – Al2O3 – Fe2O3 and CaO – Mgo – Na2O also separate the fire clay and the bauxite as one distinct group from the associated rocks Statistical calculations further confirm the conclusions deduced from the diagrams of the chemical analysis data of the bauxite and the associated rocks The study of non-clay minerals such as foldspars, quartz, anatase and muscovite and the clay minerals also supplements the above results The study reveals similar provenance and cycle of deposition for the fire clay and the bauxite with some break and changes when the pisolites of the bauxite were being formed The grade of the bauxite ranges between B to D according to Thoenen and Burchard (1941) classification modified by Donson and Waage (1966) The dolomite of Muzaffarabad formation underneath the cher braccia, has been found to be good quality

Item Type:Thesis (PhD)
Uncontrolled Keywords:bauxite deposit, azad kashmir, batomong, khailla, nikial, salhun, sawar gunimalni, kamroti, bauxite, muzaffarabad
Subjects:Physical Sciences (f) > Earth Sciences(f4) > Geology, (f4.1)
ID Code:1341
Deposited By:Mr. Muhammad Asif
Deposited On:27 Jan 2007
Last Modified:04 Oct 2007 21:06

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