Some thoughts on the crustal structure of Peninsular Malaysia - results of a gravity traverse


Author : Patrick J.C. RyallPublication : Bulletin of the Geological Society of MalaysiaVolume : 15Page : 9 – 18Year : 1982


Description

Bulletin of the Geological Society of Malaysia, Volume 15, December 1982, pp. 9 – 18

 

Some thoughts on the crustal structure of Peninsular Malaysia - results of a gravity traverse

PATRICK J.C. RYALL*

School of Physics, Universiti Sains Malaysia, Minden, Pulau Pinang, Malaysia

*Present address: Department of Geology, Dalhousie University, Halifax, Nova Scotia,Canada, 83H 3J5.

 

Abstract: A gravity profile was made across Peninsular Malaysia from Kuantan to Kuala Selangor. After Bouguer and terrain corrections, the major features of the profile are a gravity minimum over the granite of the Main Range and a maximum in the central Mesozoic sedimentary basin. The anomaly over the Main Range is caused by the contrast between the granite and the denser metamorphosed Palaeozoic rocks on each flank. The maximum may be caused by either near-surface dense igneous rocks associated with the Kampong Awah andesitic agglomerate or by thinning or absence of the sialic layer under the central basin.