Petrochemistry of the rocks from Babaji area, a part of the Ambela Granitic Complex, Buner, Northern Pakistan
Abstract
Geological mapping covering 50 km2 around Babaji in Buner, shows that the area comprises of syenites, quartz-syenites and granites. The rocks are distinguished on the basis of field and petrographic observations. Petrochemically (19 analyses) the Babaji rocks are comagmatic and have the characteristics of an extensional type of plutonic suite, associated with rifting. There is a close correlation of available chemical indices of the studied suite with similar rocks elsewhere in the world.
References
Ahmad, S. & Ahmad, Z., 1974. Pmochemistry of the Ambda granites, southern Swat district,
Wstan. Pak. Jour. Sci. Res. 26, 63-49.
Bailey, D.K., 1978. Continental rifting and mantle degassing. In Petrology and geochemistry of continental rifts (E.R. Neumann and LB. Ramberg, eds.), Reidel, Netherlands.
Chaudhry, M.N., Ashraf, M., Hussain, S.S. & Iqbd, M., 1976. Geology and petrology of Malakand and a part of Dir: Toposheet 38 N/4. Geol. Bull. Univ. Punjab 12. 17-39.
Coleman, R.G. & Peterman, Z.E., 1975. Oceanic plagiogranite. J. Geophy. Res. 80, 1099-1108.
Coulson, A.L., 1936. A soda-granite suite in the North-West Frontier Province. Proceedings of the National Inst. Sci. India 2, 103-111.
Davies, R.G. & Ahmad, R., 1965. The orthoconic mutiloids of the Kala Limestone and the probable age of the Swabi Formation. Geol. Bull. Univ. Punjab 3, 1-4.
Debon, F. & Le Fort, P., 1983. Chemical and mineralogical classification of common plutonic rocks and associations. Earth Sciences, Trans. Royal SIC. Edinburgh 73; (in press).
Kempe, D.R.C., 1973. The petrology of the Warsak alkaline granites, Pakistan and their relationship to other alkaline rocks of the region. Geol. Mag. 110, 383-404.
Kempe, D.R.C., 1983. Alkaline granites and syenites of the, Peshawar Plain alkaline igneous province northwest Pakistan. In Granites of the Himalayas, Karakoram and Hindukush (Shams, F.A., ed.); (in press).
Kempe, D.R.C., & Jan, M.Q., 1970. An alkaline igneous province in the North-West Frontier Province, West Pakistan. Geol. Mag. 107, 395-398.
Kempe, D.R.C., & Jan, M.Q., 1979. The Peshawar Plain alkaline igneous Province, NW Pakistan Geol. Bull. Univ. Peshawar 13, 71-77.
Martin, N.R., Siddiqui, S.F. & King, B.H., 1962. A geological reconnaissance of the region between the Lower Swat and Indus rive of Pakistan. Geol. Bull. Univ. Punjab 2, 1-13.
Powell. C. Mc.A., 1979. A speculative tectonic history of Pakistan and surroundings: some constraints from the Indian Ocean. In Geodynamics of Pakistan, Geol. Surv. Pakistan, Quetta, 5-24.
Powell. C. Mc.A., & Conaghan, P.V. 1973. Plate tectonics and the Himalaya: Earth Planet. Sd. Letters 20, 1-20.
Radian, A.A.M., Fyfe, W.S. & Kerrich, R., 1981. Origin of peralkaline granites of Saudi Arabia. Contrib. Mb. Pet. 78, 358-366.
Siddiqui. S.F.A., 1965. Alkaline rocks of Swat, Chamla. Geol. Bull. Univ. Punjab 5, 52-53.
Siddiqui. S.F.A., Chaudhry, M.N. & Shakoor, A., 1968. Geology and petrology of feldspathoidal syenites and he associated rocks of the Koga area, Chamla valley, Swat, West Pakistan. Geol. Bull. Univ. Punjab 7, 1-30.
Sorensen, H. (Ed.), 1974. The alkaline rocks. Wiley, London.
Streckeisen, A., 1975. To each plutonic rock it's proper name. Earth Sci. Rev. 12, 1-33.
Smith, I.E.M., Chappel, B.W., Wall, G.X. & Freeman, R.S., 1977. Petalkaline rhyolites associated with andesitic arc of the southwest Pacific. Earth Planet. Sci. Letters 37, 230-236.
Tuttle, O.F. & Bowen, N.L., 1958. Origin of granite in the light of experimental studies in the system Na A1 Silos - K Al Si3 O4 – SiO2. Geol. Soc. Amer. Mem. 74, 1-153.
Tayor, R.P, Strong, D.F. & Kaen, BP., 1980. The Topsaits igneous complex: Silurian-Devonian peralkaline magmatism, Newfoundland. Canad, Earth Sci. 17, 425-439.
