The Waziristan complex: some more chemical data and their interpretation

Authors

  • Syed Hamidullah National Centre of Excellence in Geology, University of Peshawar, Pakistan

Abstract

Tholeiitic and calcalkline affinities are reflected by two different sets of rocks from the Waziristan island arc in 22 major element rock analyses. Previously published clinopyroxene analyses are used for comparison. The data confirms the existence of a fossil island arc in Waziristan.

References

Ahmed, W. & Hamidullah, S., 1987. Island arc signatures from the Waziristan igneous complex, N.W.F.P., Pakistan. Geol. Bull. Univ. Peshawar, 20, 161-180.

Aoki, K. & Kushiro, I., 1968. Some clinopyroxenes from ultramafic inclusions in Drieser Welher, Eifel. Contrib. Mineral. Petrol., 18, 326-337.

Asrarullah, Ahmad, Z. & Abbas, S. G., 1979. Ophiolites in Pakistan: an introduction. In; Geodynamics of Pakistan. (A. Farah & K. DeJong, eds.). Geol. Surv. Pakistan, 181-192.

Badshah, M. S., 1985. Development potential of Waziristan copper. Rec. FATA Development Corporation, Peshawar, Vol. Ill.

Beard, J. S., 1986. Characteristic mineralogy of arc related cumulate gabbros: implications for the tectonic setting of gabbroic plutons and for andesite genesis. Geology, 14, 848-851.

Beck, R. A., Willium J. S., Gregory, W. R., Barndt, J. K, Afzal, J., Khan, A. Ms, Jurgen, H., Metji, J., Cheema, A. & Shafique, N. A., 1992. Obduction and transpressional deformation of the Waziristan arc and Kurram Trench; northwest Pakistan. Geosciences U.S.C. Los Angeles (in press).

Cox, K G., Bell, J. D. & Pankhurst, R.J., 1979. The interpretation of igneous rocks, George Allen & Unwin, London.

Droop, G. T. R., 1987. A general equation for estimating Fe'• concentrations in ferromagnesian silicates and oxides from microprobe analyses, using stoichiometric criteria. Min. Mag., 51, 431-35.

Irvine, T. N. & Baragar, W. R. A., 1971. A guide to the chemical classification of the common volcanic rocks. Can. Jour. Earth Sci., 8, 523-548.

Jan, M. Q., Khan, A. & Windley, B. E., 1983. The Waziristan ophiolite complex: Chemistry of chromites and some Other minerals. In: 2nd National Seminar on Development of Mineral Resources, Peshawar, Pakistan. Vol. l, article 8.

Jan, M. Q., Windley, B. F. Khan, A., 1985. The Waziristan ophiolite, Pakistan: General geology and chemistry of the chromite and associated phases. Econ. Geol., 80, 294-306.

Khan, A., Wahabuddin & Shah, M. R., 1982. Preliminary report on the ophiolite occurrences in parts of Waziristan, N.W.F.P., Pakistan. Pakistan Geol. Surv. Inf. Release, 129, 1-23.

LeBas, M. J., 1962. The role of aluminum in igneous clinopyroxenes with relation to their parentage. Amer. Jr. sci., 260, 267-288.

Leterrier, J., Maury, R. C., Thonon, P., Girard, D. & Marchal, M., 1982. Clinopyroxene composition as a method of identification of the magmatic affinities of paleovolcanic series. Earth Plan. Sci. Letters, 59, 139-154.

Nisbet, E. G. & Pearce, J. A., 1977. Clinopyroxene composition in mafic lavas from different tectonic settings. Contrib. Mineral. Petrol., 63, 149-160.

Papike, J. J., 1982. Pyroxene mineralogy of the moon and meteorite. In: Review in mineralogy pyroxene (CT. Prewitt, ed.). Min. Soc. Am. Spec. Pub., 7, 495-525.

Petterson, M. G., Windley, B. F. & Luff, l. W 1990. The Chalt volcanics, Kohistan, N. Pakistan: High-Mg tholeiitic and low-Mg calcalkaline volcanism in a Cretaceous island arc. Physics and Chemistry of the Earth., 17, 19-30.

Poldervaart, A. & Hess, H. F., 1951. Pyroxene in• the crystallization of basaltic magma. Jour. Geol., 59, p.472.

Schumacher, J. C., 1991. Empirical ferric iron corrections: necessity, assumptions and effects on selected geothermobarometers. Min. Mag., 55, 3-18.

Schwarzer, R. R. & Rogers, J. J. W., 1974. A worldwide comparison of alkali-olivine basalts and their differentiation trends. Earth Planet. Sci. Lett., 23, 286-296.

Shah, S. H. A., 1984. The ophiolite belts and suture traces in Pakistan Geol. Bull. Univ. Peshawar, 17, 113-117.

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Published

1994-11-30

How to Cite

Hamidullah, S. (1994). The Waziristan complex: some more chemical data and their interpretation. Journal of Himalayan Earth Sciences, 27(1), 69-79. Retrieved from http://ojs.uop.edu.pk/jhes/article/view/1461

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