Bulletin of the Geological Society of Malaysia, Volume 52, June 2006, pp. 59 – 62
Department of Geology, University of Malaya, 50603 Kuala Lumpur, Malaysia
Abstract: Textures and relationships observed in the field suggest that the older dykes intruding the Perhentian Kecil Syenite, Perhentian Island, were coeval to their host. Lobate to crenulate contact and necking of the dykes suggest that the dyke magma was injected into mobile, semi solid syenitic magma. Geochemical analyses show that the older dykes have a wide range of SiO2, between 48.87 – 56.87%.