Hostname: page-component-cd9895bd7-gxg78 Total loading time: 0 Render date: 2024-12-26T06:53:27.636Z Has data issue: false hasContentIssue false
  • English
  • Français

High-potassium granites in the Masirah ophiolite of Oman

Published online by Cambridge University Press:  01 May 2009

I. L. Abbotts
I. L. Abbotts
Affiliation:
Department of Geological Sciences, Birmingham University, Edgbaston, West Midlands.
Get access Rights & Permissions [Opens in a new window]

Summary

Masirah Island lies off the SE coast of Oman and comprises a fully developed, though tectonically disturbed ophiolite, unconformably overlain by early Tertiary limestone. The ophiolite consists of harzburgites, cumulate gabbros, a sheeted dyke complex, and pillow lavas with sediment intercalations. Within the ophiolite occur granites the geochemistry of which, particularly their high K2O and Rb, and low Zr and Zr/Nb, ismore typical of a continental crust environment and suggests that at the time of their formation continental crust existed beneath or immediately W ofthe Masirah Ophiolite.

Type
Articles
Information
Geological Magazine , Volume 115 , Issue 6 , November 1978 , pp. 415 - 425
Copyright
Copyright © Cambridge University Press 1978

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Alburquerque, C. A. R. de 1971. Petrochemistry of a series of granitic rocks from northern Portugal. Bull. geol. Soc. Am. 82, 2783–98.CrossRefGoogle Scholar
Alburquerque, C. A. R. de 1977. Geochemistry of the tonalitic and granitic of the Nova Scotia southern plutons. Geochim. cosmochim. Acta. 41, 1–14.CrossRefGoogle Scholar
Beckinsale, R. D. 1974. Rb-Sr and K-Ar age determinations and oxygen isotope data for the Glen Cannel granophyre, Isle of Mull, Argyllshire, Scotland. Earth Planet Sci. Lett. 22, 267–74.CrossRefGoogle Scholar
Brown, G. C. 1977. Mantle origin of Cordilleran granites. Nature, Lond. 265, 21–4.CrossRefGoogle Scholar
Clifford, T. N., Rooke, J. M. & Allsopp, H. L. 1969. Petrochemistry andage of the Franzfontein granitic rocks of northern South-West Africa. Geochim. cosmochim. Acta 33, 973–86.CrossRefGoogle Scholar
Coleman, R. G. & Peterman, Z. E. 1975. Oceanic plagiogranite. J. geophys. Res. 80, 1099–1108.CrossRefGoogle Scholar
Condie, K. C. 1969. Petrology and geochemistry of the Laramie batholith andrelated metamorphic rocks of Pre-Cambrian age, eastern Wyoming. Bull. geol. Soc. Am. 80, 57–82.CrossRefGoogle Scholar
Engel, C. E. & Fisher, R. L. 1975. Granitic to ultramafic rock complexes of the Indian Ocean ridge systems, western Indian Ocean. Bull. geol. Soc. Am. 86, 1553–78.2.0.CO;2>CrossRefGoogle Scholar
Erlank, A. J. & Kable, E. J. D. 1976. The significance of the incompatible elements in Mid-Atlantic Ridge basalts from 45°N with particular reference to Zr/Nb. Contr. Mineral. Petrol. 54, 281–91.CrossRefGoogle Scholar
Glennie, K. W., Bouef, M. G. A., Hughes-Clarke, M. W., Moody-Stuart, M., Pilaar, W. F. H. & Reinhardt, B. M. 1974. Geology of the Oman Mountains. Verh. K. ned. geol. mijnb. Genoot. 31, 423 pp.Google Scholar
Hahn-Weinheimer, P. & Ackermann, H. 1967. Geochemical investigation of differentiated granite plutons of the southern Black Forest. II. The zoningof the Marlsburg Granite pluton as indicated by the elements titanium, zirconium, phosphorous, strontium, barium, rubidium, potassium and sodium. Geochim. cosmochim. Acta 31, 2197–218.CrossRefGoogle Scholar
Higgins, M. W. 1971. Cataclastic rocks. Prof. Pap. U.S. geol. Surv. 687, 1–95.Google Scholar
Kolbe, P. & Taylor, S. R. I. 1966. Geochemical investigation of the granitic rocks of the Snowy Mountains area, New South Wales. J. geol. Soc. Aust. 13, 1–25.CrossRefGoogle Scholar
Larsen, E. S. Jr. 1948. Batholith and associated rocks of Corona, Elsinore, and San Luis Rey quadrangler, southern California. Mem. geol. Soc. Am. 29, 1–160.Google Scholar
Lees, G. M. 1928. The geology and tectonics of Oman and of part of south-eastern Asia. Q. Jl geol. Soc. Lond. 84, 585–670.CrossRefGoogle Scholar
MacDonald, R., Upton, B. G. J. & Thomas, J. E. 1973. Potassium and fluorine-rich hydrous phase co-existing with peralkaline granite in south Greenland. Earth Planet Sci. Lett. 18, 217–22.CrossRefGoogle Scholar
McKenzie, C. B. & Clarke, D. B. 1975. Petrology of the South Mountain batholith Nova Scotia. Can. J. Earth Sci. 12, 1208–18.CrossRefGoogle Scholar
Miyashiro, A. 1973. The Troodos ophiolitic complex was probably formed in an island arc. Earth Planet Sci. Lett. 19, 218–24.CrossRefGoogle Scholar
Morton, D. M. 1959. The geology of Oman. Proc. Fifth Wld Petrol. Cong., New York, section 1, paper 14, pp. 227–80.Google Scholar
Moseley, F. 1969. The Upper Cretaceous ophiolite complex of Masirah Island, Oman. Geol. J. 6, 293–306.CrossRefGoogle Scholar
Nagasawa, H. 1970. Rare earth concentrations in zircons and apatites and their host dacites and granites. Earth Planet Sci. Lett. 9, 359–64.CrossRefGoogle Scholar
Nockolds, S. R. & Allen, R. 1953. The geochemistry of some igneous rockseries. Geochim. cosmochim. Acta. 4, 105–42.CrossRefGoogle Scholar
Pearce, J. A. & Cann, J. 1973. Tectonic setting of basic volcanic rocksusing trace element analyses. Earth Planet Sci. Lett. 19, 290–300.CrossRefGoogle Scholar
Price, R. C. & Taylor, S. R. 1977. The rare earth element geochemistry of granite, gneiss and migmatite from the Western Metamorphic Belt of south-eastern Australia. Contr. Mineral. Petrol. 62, 249–63.CrossRefGoogle Scholar
Reed, F. R. C. 1949. The Geology of the British Empire, 2nd ed. Edward, Arnold.CrossRefGoogle Scholar
Saunders, A. D., Tarney, J., Stern, C. R. & Dalziel, I. W. D. 1978. Geochemistry of Mesozoic marginal basin floor igneous rocks from southern Chile. Bull. geol. Soc. Am. (in press).Google Scholar
Smith, T. E. 1974. The geochemistry of the granitic rocks of Halifax County, Nova Scotia. Can. J. Earth Sci. 11, 650–6.CrossRefGoogle Scholar
Thompson, R. N. 1968. Tertiary granites and associated rocks of the Marsco area, Isle of Skye. Q. Jl geol. Soc. Lond. 124, 349–85.CrossRefGoogle Scholar
West, S. 1974. The geology of the Danco Coast, Graham Land. Br. Antarctic Surv. Sci. Rep. 84, 57 pp.Google Scholar
Wilson, H. H. 1969. Late Cretaceous eugeosynclinal sedimentation, gravity tectonics, and ophiolite emplacement in the Oman Mountains, South-east Arabia. Bull. Am. Ass. Petrol. Geol. 53, 626–71.Google Scholar