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Perim Island, a volcanic remnant in the southern entrance to the Red Sea

Published online by Cambridge University Press:  01 May 2009

D. I. J. Mallick ,
I. G. Gass ,
K. G. Cox ,
B. V. W. De Vries  and
A. G. Tindle
D. I. J. Mallick
Affiliation:
BGS, Murchison House, West Mains Road, Edinburgh, U.K.
I. G. Gass
Affiliation:
Department of Earth Sciences, Open University, Milton Keynes MK7 6AA, U.K.
K. G. Cox
Affiliation:
Department of Earth Sciences, Parks Road, Oxford, OX1 3PR, U.K.
B. V. W. De Vries
Affiliation:
Department of Earth Sciences, Open University, Milton Keynes MK7 6AA, U.K.
A. G. Tindle
Affiliation:
Department of Earth Sciences, Open University, Milton Keynes MK7 6AA, U.K.
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Abstract

Perim Island is an eroded fragment of the southwest flank of a late Miocene (10.5 ± 1.0 Ma) volcano whose centre lay on the southwesternmost tip of Arabia. The volcano is the westernmost of the E–W line of six central vent volcanoes (the Aden Line) that extends 200 km along the south coast of Arabia from Perim to Aden. Major oxide and trace element abundances are given for 35 Perim specimens and these show that the volcano has within-plate trace element characteristics and consists of a petrographically and geochemically simple suite of alumina-poor olivine basalts, andesites, and transitional andesite–trachyandesites. Six specimens, however, are markedly enriched in Al2O3 and CaO, and contain abundant (20–30 mode %) highly calcic (An77–83) plagioclase phenocrysts. Geochemical modelling suggests that the main Perim volcanic sequence was produced by the fractional crystallization (o1 + cpx + Ti-mt + plag) of a silica saturated (SiO2 c. 45%) basic melt. The high A1, high Ca, magmas appear to be mixing products of plagioclase-enriched basic magmas with more evolved melts. Perim is the oldest volcano of the Aden line, which becomes increasingly younger and alkalic eastward. It is suggested that the volcanism is related to an eastwards-propagating rift produced before the most recent stage of sea-floor spreading in the Gulf of Aden (4.5 Ma–present).

Type
Articles
Information
Geological Magazine , Volume 127 , Issue 4 , July 1990 , pp. 309 - 318
Copyright
Copyright © Cambridge University Press 1990

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References

Civetta, L., La Volpe, L. & Lirer, L. 1978. K-Ar ages of the Yemen Plateau. Journal of Volcanology and Geothermal Research 4, 307–14.CrossRefGoogle Scholar
Cochran, J. R. 1981. The Gulf of Aden: structure and evolution of a young ocean basin and continental margin. Journal of Geophysical Research 86, 263–87.CrossRefGoogle Scholar
Cox, K. G., Gass, I. G. & Mallick, D. I. J. 1969. The evolution of the volcanoes of Aden and Little Aden, south Arabia. Quarterly Journal of the Geological Society of London 124, 283–305.CrossRefGoogle Scholar
Cox, K. G., Gass, I. G. & Mallick, D. I. J. 1970. The peralkaline volcanic suite of Aden and Little Aden, South Arabia. Journal of Petrology 11, 433–61.CrossRefGoogle Scholar
Cox, K. G., Gass, I. G. & Mallick, D. I. J. 1977. The Western part of the Shuqra volcanic field, South Yemen. Lithos 10, 185–91.CrossRefGoogle Scholar
Cox, K. G. & Mitchell, C. 1988. Importance of crystal settling in the differentiation of Decan Trap basaltic magmas. Nature 333, 447–9.CrossRefGoogle Scholar
Dickinson, R. D., Dadson, M. H., Gass, I. G. & Rex, D. C. 1969. Correlation of initial 87Sr/86Sr with Rb/Sr in some late Tertiary volcanic rocks of South Arabia. Earth and Planetary Science Letters 6, 84–90.CrossRefGoogle Scholar
Gass, I. G., Cox, K. G. & Mallick, D. I. J. 1973. Volcanic islands of the Red Sea. Journal of the Geological Society of London 129, 275–310.CrossRefGoogle Scholar
Gass, I. G. & Mallick, D. I. J. 1968. Jebel Khariz: an Upper Miocene strato-volcano of comenditic affinity on the South Arabian coast. Bulletin Volcanologique 32–1, 33–88.CrossRefGoogle Scholar
Hempton, M. R. 1987. Constraints on Arabian plate motion and extensional history of the Red Sea. Tectonics 6, 687–705.CrossRefGoogle Scholar
Hess, H. H. & Poldervaart, A. (eds) 1967. Basalts – The Poldervaart Treatise on Rocks of Basaltic Composition, Volume 1. New York: John Wiley Interscience.Google Scholar
Le Bas, M. J., Le Maître, R. W., Streckeisen, A. & Zanettin, B. 1986. A chemical classification of volcanic rocks based on the total alkali–silica diagram.Journal of Petrology 27, 745–50.CrossRefGoogle Scholar
Martin, D. & Nokes, R. 1988. Crystal settling in a vigorously convecting magma chamber. Nature 332, 354–6.CrossRefGoogle Scholar
Mohr, P. A. 1983. Ethiopian flood basalt province. Nature 303, 577–84.CrossRefGoogle Scholar
Nathan, H. D. & Van Kirk, K. 1978. A model of magmatic crystallization. Journal of Petrology 19, 66–94.CrossRefGoogle Scholar
Pearce, J. A. 1983. Role of the sub-continental lithosphere in magma genesis at active continental margins. In Continental Basalts and Mantle Xenoliths (eds Hawkesworth, C. J. and Norry, M. J.), pp. 230–49. Nantwich, Cheshire: Shiva Publishing Ltd.Google Scholar
Potts, P. J., Webb, P. C. & Watson, J. S. 1984. Energy dispersive X-ray fluorescence analysis of silicate rocks for major and trace elements. X-ray Spectrometers 13 (1), 2–15.CrossRefGoogle Scholar
Raisin, C. A. 1902. Notes on the geology of Perim Island. Geological Magazine 9, 206–10.CrossRefGoogle Scholar
White, R. & McKenzie, D. 1989. Magmatism at rift zones: the generation of volcanic continental margins and flood basalts. Journal of Geophysical Research 94, No.B6, 7685–730.CrossRefGoogle Scholar
Wissman, H. V., Rathjens, C. & Kossmat, F. 1942. Beiträge zur Tectonik Arabians. Geologische Rundschau 33, 221–353.Google Scholar