Influence of bela ophiolite on trace element composition of Jurassic and cretaceous carbonate rocks of phuari area Balochistan

Major and selected trace element analysis of carbonate rocks of Loralai formation and Parth limestone from Phuari area of Balochistan province were carried out. These carbonates are melanged with rocks of Bela Ophiolite. The distribution of various trace elements (Ni, Cr, Cu, Mn, Cd, Pb and Zn) in the carbonate rocks in the light of their plots was discussed with respect to primary dispersion, mobility and physicochemical environment. An attempt has also been made to evaluate the influence of magnetic bodies for impregnating trace elements into limestones. High Ni, Cr, Mn, Cu, Cd, Pb and Zn assemblage show similarity with tholeitic Mid Oceanic Ridge Basalt (MORB) Petrographic studies were also made for description and classification of carbonates. Presence of dark glassy/amorphous igneous material in thin-sections emphasizes the influence of igneous bodies on carbonate rocks. (author)