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Comments on the eruption of basaltic magma at Tor Zawar, Balochistan, Pakistan on 27 January 2010, with a discussion of the geochemical and petrological constraints on its petrogenesis

Published online by Cambridge University Press:  05 July 2018

A. M. Kassi ,
A. K. Kasi ,
A. Tawab Khan  and
A. Salam Khan
A. M. Kassi
Affiliation:
Department of Geology, University of Balochistan, Quetta, Pakistan
A. K. Kasi*
Affiliation:
Department of Geology, University of Balochistan, Quetta, Pakistan
A. Tawab Khan
Affiliation:
Department of Geology, University of Balochistan, Quetta, Pakistan
A. Salam Khan
Affiliation:
Department of Geology, University of Balochistan, Quetta, Pakistan
*
E-mail: aimal_kasi@yahoo.co.uk
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Abstract

An article by A. C. Kerr and coworkers published in 2010 in Mineralogical Magazine (74, 1027–1036), reviewed an event that was interpreted as the eruption of a basaltic flow on 27th January 2010, at Tor Zawar, Ziarat, Pakistan. The regional and local geology, volcanological aspects, petrography and major-element and trace-element analyses of two samples were presented. On the basis of these data it was proposed that this was a magmatic event and that the lava was derived from the mantle. On the basis of our extensive field work in the this area, and observations at the site of another similar incident that happened almost a year later (in January 2011) ∼300 m north of the first locality, we wish to clarify the geological context and propose an alternative origin.

Our field observations suggest that both events were the result of localized surface melting at the base of metal electricity pylons, and their associated steel cable supports. The metal pylons and cable supports provided a path to earth for lightning discharges into the volcanic conglomerate of the Late Cretaceous Bibai Formation. We propose that this transmitted sufficient energy to melt the outcrop. We disagree with the proposal that the 'lava flows' at Tor Zawar were magmatic events and that the rocks formed are derived from the mantle. Alternatively, we propose that these 'lavas' were produced in a manner similar to fulgurites.

Keywords

basaltic magmafulguriteTor ZawarBalochistan
Type
Research Article
Information
Mineralogical Magazine , Volume 76 , Issue 3 , June 2012 , pp. 717 - 723
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2016

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References

Ambraseys, N. and Bilham, R. (2003) Earthquakes and associated deformation in northern Baluchistan 1892-2001. Bulletin of the Seismological Society of America, 93, 1573—1605 CrossRefGoogle Scholar
Anderson, A.E. (1925) Sand fulgurites from Nebraska: their Structure and formative factors. Nebraska State Museum Bulletin, 1, 49—86.Google Scholar
Bender, F.K. and Raza, H.A. (1995) Geology of Pakistan. Gebrüder Borntraeger, Berlin.414 pp.Google Scholar
Bhattacharyya, C., Das, S., Banerjee, J. and Pal, S.P. (2002) Rock melt extrusion at Puruliya, west Bengal. Journal of the Geologica. Society of India, 60, 323—327 Google Scholar
Fenner, C. (1949) Sand tube fulgurites and their bearing on the tektite problem. Records of the South Australian Museum, 9, 127—42Google Scholar
Frondel, C. (1962) Dana’s System of Mineralogy, volume 3. Wiley, New York..Google Scholar
Galliot, M.P. (1980) Petrified lightening: a discussion of sand fulgurites. Rocks & Minerals, 55, 13—17 CrossRefGoogle Scholar
Hunting Survey Corporation (1961) Reconnaissance Geology of part of West Pakistan: A Colombo Plan Cooperation Project. Maracle Press, Toronto, Canada..Google Scholar
Jadoon, I.A.K. and Khurshid, A. (1996) Gravity and tectonic model across the Sulaiman fold belt and the Chaman fault zone in western Pakistan and eastern Afghanistan. Tectonophysics, 254, 89—109 CrossRefGoogle Scholar
Kassi, A.M., Kelling, G., Kasi, A.K., Umar, M. and Khan, A.S. (2009) Contrasting Late Cretaceous– Palaeocene lithostratigraphic successions across the Bibai Thrust, western Sulaiman Fold-Thrust Belt, Pakistan: their significance in deciphering the earlycollisional history of the NW Indian Plate margin. Journal of Asian Earth Sciences, 35, 435—444 CrossRefGoogle Scholar
Kerr, A.C., Khan, M. and McDonald, I. (2010a) Eruption of basaltic magma at Tor Zawar, Balochistan, Pakistan on 27 January 2010: geochemical and petrological constrains on petrogenesis. Mineralogical Magazine, 74, 1027—1036 Google Scholar
Kerr, A.C., Khan, M., Mahoney, J.J., Nicholson, K.N. and Hall, C.M. (2010b) Late Cretaceous alkaline sills of the south Tethyan suture zone, Pakistan: initial melts of the Réunion hotspot? Lithos, 117, 161—171 CrossRefGoogle Scholar
Khan, A.T., Kassi, A.M. and Khan, A.S. (2000) The Upper Cretaceous Bibai submarine Fan (Bibai Formation), Kach Ziatrat Valley, western Suleiman Thrust-Fold Belt, Pakistan. Acta Mineralogic. Pakistanica, 11, 1—24.Google Scholar
Kazmi, A.H. (1979) The Bibai and Gogai Nappes in the Kach-Ziarat area of northeastern Balochistan. Pp. 333-340 in: Geodynamics of Pakistan (A. Farah and K.A. DeJong, editors). Geological Survey of Pakistan, Quetta, Pakistan.Google Scholar
Libby, C.A. (1986) Fulgurites in the Sierra Nevada. California Geology, 39, 262.Google Scholar
Mackerras, D., Darveniza, M., Orville, R.E., Williams, E.R. and Goodman, S.J. (1998) Global lightning: total, cloud and ground flash estimates. Journal of Geophysical Research. 103, 19, 791—19, 810.Google Scholar
Mahoney, J.J., Duncan, R.A., Khan, W., Gnos, E. and McCormick, G.R. (2002) Cretaceous volcanic rocks of the South Tethyan suture zone, Pakistan: implications for the Réunion hotspot and Deccan Traps. Earth and Planetary Science Letters, 203, 295—310 CrossRefGoogle Scholar
Manimaran, G., Sivasubramanian, P. and Senthiappan, M. (2001) Rock melt intrusion at Abishekapatti, Tirunelveli district, Tamil Nadu. Journal of the Geologica. Society of India, 57, 464—466 Google Scholar
Orville, R.E. (1968) A high-speed time-resolved spectroscopic study of the lightning return stroke. Part III. A time-dependent model. Journal of Atmospheri. Sciences, 25, 852—856 Google Scholar
Petty, J.J. (1936) The origin and occurrence of fulgurites in the Atlantic coastal plain. America. Journal of Science, 31, 188—201 Google Scholar
Purdom, W.B. (1966) Fulgurites from Mt. Thielsen. The Or. Bin, 28, 153—159 Google Scholar
Raeside, J.D. (1968) A note on artificial fulgurites from a soil in South East Otago. New Zealand Journal of Geology an. Geophysics, 11, 72—76.Google Scholar
Rana, A.N. and Akhtar, S.S. (2010) Preliminary Report on Eruption of Molten Material in Tor Zawar Mountain, Sari, Ziarat, Balochistan on January 27, 2010. Information Release No. 891, Geological Survey of Pakistan, Islamabad, 24 pp..Google Scholar
Shah, S.M.I. (1977). Stratigraphy of Pakistan. Geological Survey of Pakistan Memoirs, 12, 138 pp. Siddiqui, R.H., Khan, I.H. and Aziz, A. (1996) Geology and petrogenesis of hotspot-related magmatism on the northwestern margin of the Indian continent. Proceedings of Geoscience Colloquium, Geoscience Laboratory. GSP, 16, 115—148 Google Scholar
Switzer, G. and Melson, W.G. (1972) Origin and composition of rock fulgurite glass. The Earth Scientist, 9, 1972.Google Scholar
Uman, M.A. (1969) Lightning, an Advanced Physics Monograph. McGraw-Hill, New York.CrossRefGoogle Scholar
Uman, M.A. and Krider, E.P. (1989) Natural and artificially initiated lightning. Science, 246, 457—464 CrossRefGoogle ScholarPubMed
Williams, D.J. and Johnson, W. (1980) A note on the formation of fulgurites. Geologica. Magazine, 117, 293—296 Google Scholar