Note on dolerite, rhyolite, and granophyre in the basement of the Tenggol Arch, offshore Terengganu

Abstract

Cores from the basement in well Malong 5G-17.2 at 1582 m subsea, consist of highly fractured porphyritic rhyolite in sharp contact with a dolerite dyke. Lower Miocene conglomerate of rhyolite and granophyre clasts overlies the rhyolite. The granophyre clasts were presumeably derived from a granophyric basement subcrop. The dolerite dyke may have been intruded during basin rifting in early Cenozoic.