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Characterization and Origin of Dolomite Associated with Hydrothermal Iron Ore in Paleozoic limestone, Kinta Valley

Shukri, Farid Faliq (2010) Characterization and Origin of Dolomite Associated with Hydrothermal Iron Ore in Paleozoic limestone, Kinta Valley. Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Dolomite occurring in association with hematite in the Kinta Valley, particularly in Kek Lok Tong (KL T), Gunung Rapat and Gunung Panjang (GP), Tambun commonly displays a curved or "saddle" crystal shape. Based on preliminary observations, the dolomite is believed to be hydrothermal in origin. However, this assumption needs to be supported by chemical analyses. XRD analysis was conducted to verifY the dolomite mineralogy. Samples were sent to the University of Miami for stable (carbon and oxygen) isotope analysis to determine the environment of the dolomite formation. XRF analysis was conducted to measure concentrations in major and trace elements in the dolomite. The isotopic analysis shows that the a180 values for the dolomite are highly depleted, ranging from -18.4%0 to -16.3-f/00 and the a13C values are slightly positive, ranging from 0.63%0 and 1.15°/00.Compared with other analyzed hydrothermal dolomite like dolomite in Western Canada, Guilin, and Southern Cantabrian Zone Spain, the a180 values ranging from -13.9 %o to -3.5°/oo and a13C values ranging from -2."floo to 5.2°/00.KLT, Gunung Rapat and GP, Tambun dolomite is relatively within above range except slightly depleted in the a180 values. In addition to that, according to Taury Smith (2004), hydrothermal dolomites typically have depleted li180 values which are between -2 to -20%o .From the XRF analysis, the dolomite shows the non stoichiometric ratio of CaC03 and MgC03 .The concentration for iron and manganese are quite high ranging from 11 OOppm to 34400ppm for iron and 7200ppm to 13100ppm for manganese. The two metals most enriched in hydrothermal vent fluids are iron and manganese (Holland and Turekian, 2010). Other minerals also have been identified such as silicon, titanium, aluminum, sulfur, phosphorus, potassium, molybdenum, cerium, yttrium, antimony, rubidium, thorium, vanadium, nickel, arsenic, niobium, chromium, uranium, plumbum, zinc and copper. The concentration for the valuables metal like argentum, platinum and aurum is very low so much so that they can be considered negligible.

Item Type: Final Year Project
Academic Subject : Academic Department - Chemical Engineering - Environment
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Chemical
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 12:12
Last Modified: 22 Oct 2013 12:12
URI: http://utpedia.utp.edu.my/id/eprint/9423

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