Rare-earth elements modelling of the Langkawi granites

Wan Fuad Wan Hassan, and Azman A. Ghani , and Syafrina Ismail , (2001) Rare-earth elements modelling of the Langkawi granites. Sains Malaysiana, 30 . pp. 13-26. ISSN 0126-6039

Full text not available from this repository.

Official URL: http://www.ukm.my/jsm/english_journals/vol30_2001/...


Based on the REE patterns the Langkawi granites can be divided into two groups i.e. the Gunung Raya-Dayang Bunting granite and Kuah-Pulau Tuba granite. The Gunung Raya-Dayang Bunting granite has weak negative Eu anomalies whereas the Kuah-Pulau Tuba granite has moderately strong negative Eu anomalies. Rb/Sr ratios also show similar differences with Rb/Sr ratios in Kuah-Pulau Tuba granites being much higher than those of the Gunung Raya-Dayang Bunting granite. Examination of the REE patterns shows that they have the usual 'bird-wing' shape with weak to moderately strong negative Eu anomalies. This pattern is similar to the West coast S-type granites and is different from the I-type granites of the East coast. A possible source material for the Langkawi granite is the Cambrian sediments of the Machinchang Formation. Modelling of the REE pattern has been carried out in two stages namely batch melting and fractional crystallisation. Results show that the Gunung Raya-Dayang Bunting magma requires a slightly higher degree of partial melting fraction (0.15-0.25%) compared to the Kuah-Pulau Tuba magma (0.25-0.3%). On the other hand the Gunung Raya­/Dayang Bunting magma has undergone a higher degree of fractionation (16%) compared to the Kuah-Pulau Tuba magma (9%).

Item Type:Article
Journal:Sains Malaysiana
ID Code:3800
Deposited By: Mr Fazli Nafiah -
Deposited On:20 Mar 2012 03:20
Last Modified:04 May 2012 03:44

Repository Staff Only: item control page