Current Science

Open Access Open Access  Restricted Access Subscription Access

Petrogenesis of Ajil Mafic Dykes from Eastern Belt of Peninsular Malaysia:Fractionated within Plate Lithospheric Mantle Magma Beneath the Eastern Malaya Block


Affiliations
1 Department of Geology, University of Malaya 50603, Kuala Lumpur, Malaysia
 

North-eastern trending mafic dykes are found intruding granitic body in Ajil area, Eastern Belt of Peninsular Malaysia. The intrusions display sharp, vertical to sub-vertical contacts to granitic host and consist mainly of plagioclase and clinopyroxene. Majority of the dykes are quartz tholeiite with some olivine tholeiite. All dykes display enrichment in light rare earth elements (LREE) relative to heavy rare earth elements (HREE) and depletion in high field strength elements (HFSE) and Pb. Low compatible elements’ content such as MgO, Ni and Cr implied that crystal fractionation were controlled by olivine and clinopyroxene. The dykes were originated from shallow lithospheric mantle, the source region of which has been influenced by hydrous metasomatism. The emplacement of the dykes took place in fault-controlled within-plate tectonic setting.

Keywords

Ajil Mafic Dykes, Clenopyroxene, Peninsular Malaysia, Petrogenesis, Plagioclase.
User
Notifications
Font Size

  • Searle, M. P. et al., Tectonic evolution of the Sibumasu-Indochina terrane collision zone in Thailand and Malaysia: constraints from new U-Pb zircon chronology of SE Asian tin granitoids. J. Geol. Soc., 2012, 169, 489–500.

  • Tjia, H. D. and Gobbett, D. J., Tectonic history. In Geology of the Malay Peninsula: West Malaysia and Singapore (eds Gobbett, D. J. and Hutchison, C. S.), John Wiley-Interscience, New York, 1973, pp. 305–330.

  • Hutchison, C. S., Tectonic evolution of Sundaland: a Phanerozoic Synthesis. Bull. Geol. Soc. Malaysia, 1973, 6, 61–86.

  • Cobbing, E. J., Pitfield, P. E. J., Darbyshire, D. P. F. and Mallick, D. I. J., The granites of the South-East Asian Tin Belt. Overseas Memoir 10. British Geological Survey, 1992.

  • Ghani, A. A., Lo, C.-H. and Chung, S.-L., Basaltic dykes of the Eastern Belt of Peninsular Malaysia: the effects of the difference in crustal thickness of Sibumasu and Indochina. J. Asian Earth Sci., 2013, 77, 127–139.

  • Thompson, R. N., Dispatches from the basalt front. 1. Experiments. Proc. Geol. Ass., 1984, 95, 249–262.

  • Winchester, J. A. and Floyd, P. A., Geochemical discrimination of different magma series and their differentiation products using immobile elements. Chem. Geol., 1977, 20, 325–343.

  • Hooper, P. R. and Hawkesworth, C. J., Isotopic and geochemical constraints on the origin and evolution of the Columbia River basalt. J. Petrol., 1993, 34, 1203–1246.

  • Blundy, J. D., Robinson, J. A. C. and Wood, B. J., Heavy REE are compatible in clinopyroxene on the spinel lherzolite solidus. Earth Planet. Sci. Lett., 1998, 160, 493–504.

  • McDonough, W. F. and Sun, S. S., Composition of the Earth. Chem. Geol., 1995, 120, 223–253.

  • Xia, L. Q., The geochemical criteria to distinguish continental basalts from arc related ones. Earth Sci. Rev., 2014, 139, 195–212.

  • Wilson, M., Igneous petrogenesis. Unwin Hyman, London, UK, 1989, p. 466.

  • Shervais, J. W., Ti–V plots and the petrogenesis of modern and ophiolitic lavas. Earth Planet. Sci. Lett., 1982, 59, 101–118.

  • Pearce, J. A. and Norry, M. J., Petrogenetic implications of Ti, Zr, Y, and Nb variations in volcanic rocks. Contrib. Mineral. Petrol., 1979, 69, 33–37.

  • Pearce, J. A., Trace element characteristics of lavas from destructive plate boundaries. In Andesites (ed. Thrope, R. S.), Wiley, New York, 1982, pp. 525–548.

  • Sun, S. S. and McDonough, W. F., Chemical and isotopic systematic of oceanic basalts: implications for mantle composition and processes. In Magmatism in the Ocean Basins (eds Saunders, A. D. and Norry, M. J.), Geological Society Special Publication, 1989, vol. 42, 313–345.

  • Rudnick, R. L. and Gao, S., Composition of the Continental Crust. Treatise on Geochemistry, Elsevier, Amsterdam, 2003, 3, 1–64.

  • Hawkesworth, C. J., Lightfoot, P. C., Fedorenko, V. A., Blake, S., Naldrett, A. J., Doherty, W. and Gorbachev, N. S., Magma differentiation and mineralisation in the Siberian continental flood basalts. Lithos, 1995, 34, 61–88.

  • Puffer, J. H., Contrasting high field strength element contents of continental flood basalts from plume versus reactivated-arc sources. Geology, 2001, 29, 675–678.

  • Murphy, J. B. and Dostal, J., Continental mafic magmatism of different ages in the same terrane: constraints on the evolution of an enriched mantle source. Geology, 2007, 35, 335–338.

  • Hutchison, C. S., Geological Evolution of South-East Asia, Geological Society of Malaysia, Malaysia, 2007, 2nd edn.

  • Morgan, W. J., Convection plumes in the lower mantle. Nature, 1971, 230, 42–43.

  • Fitton, J. G., Coupled molybdenum and niobium depletion in continental basalts. Earth Planet. Sci. Lett., 1995, 136, 715–721.

  • Gibson, S. A., Thompson, R. N., Leonardos, O. H., Dickin, A. P. and Mitchell, J. G., The limited extent of plume–lithosphere interactions during continental flood-basalt genesis: geochemical evidence from Cretaceous magmatism in southern Brazil. Contrib. Mineral. Petrol., 1999, 137, 147–169.

  • Le Roex, A. P., Dick, H. J. B., Erlank, A. J., Reid, A. M., Frey, F. A. and Hart, S. R., Geochemistry, mineralogy and petrogenesis of lavas erupted along the south west Indian ridge between the Bouvet triple junction and 11 degrees east. J. Petrol., 1983, 24, 267–318.

  • Thompson, R. N. and Morrison, M. A., Asthenospheric and lower-lithospheric mantle contributions to continental extension magmatism: an example from the British Tertiary Province. Chem. Geol., 1988, 68, 1–15.

  • Dupuy, C., Liotard, J. M. and Dostal, J., Zr/Hf fractionation in intraplate basaltic rocks: carbonate metasomatism in the mantle source. Geochim. Cosmochim. Acta, 1992, 56, 2417–2423.

  • Jorg, A., Pfänder, J. A., Munker, C., Stracke, A. and Mezger, K., Nb/Ta and Zr/Hf in ocean island basalts – implications for crustmantle differentiation and the fate of Niobium. Earth Planet. Sci. Lett., 2007, 254, 158–172.

  • Chen, Y. et al., Slab breakoff triggered ca. 113 Ma magmatism around Xainza area of the Lhasa Terrane, Tibet. Gondwana Res., 2014, 26(2), 449–463.

  • Kepezhinskas, P., McDermott, F., Defant, M. J., Hochstaedter, A. and Drummond, M. S., Trace element and Sr–Nd–Pb isotopic constraints on a three-component model of Kamchatka Arc petrogenesis. Geochim. Cosmochim. Acta, 1997, 61, 577–600.


Abstract Views: 246

PDF Views: 98




  • Petrogenesis of Ajil Mafic Dykes from Eastern Belt of Peninsular Malaysia:Fractionated within Plate Lithospheric Mantle Magma Beneath the Eastern Malaya Block

Abstract Views: 246  |  PDF Views: 98

Authors

Muhammad Hafifi Badruldin
Department of Geology, University of Malaya 50603, Kuala Lumpur, Malaysia
Azman A. Ghani
Department of Geology, University of Malaya 50603, Kuala Lumpur, Malaysia
Long Xiang Quek
Department of Geology, University of Malaya 50603, Kuala Lumpur, Malaysia

Abstract


North-eastern trending mafic dykes are found intruding granitic body in Ajil area, Eastern Belt of Peninsular Malaysia. The intrusions display sharp, vertical to sub-vertical contacts to granitic host and consist mainly of plagioclase and clinopyroxene. Majority of the dykes are quartz tholeiite with some olivine tholeiite. All dykes display enrichment in light rare earth elements (LREE) relative to heavy rare earth elements (HREE) and depletion in high field strength elements (HFSE) and Pb. Low compatible elements’ content such as MgO, Ni and Cr implied that crystal fractionation were controlled by olivine and clinopyroxene. The dykes were originated from shallow lithospheric mantle, the source region of which has been influenced by hydrous metasomatism. The emplacement of the dykes took place in fault-controlled within-plate tectonic setting.

Keywords


Ajil Mafic Dykes, Clenopyroxene, Peninsular Malaysia, Petrogenesis, Plagioclase.

References





DOI: https://doi.org/10.18520/cs%2Fv113%2Fi07%2F1448-1455