Geochemistry of tourmaline-bearing granite from Maras-Jong, Terengganu, Peninsular Malaysia


Author : Azman A. GhaniPublication : Bulletin of the Geological Society of MalaysiaVolume : 46Page : 19-24Year : 2003


Description

Bulletin of the Geological Society of Malaysia, Volume 46, May 2003, pp. 19 - 24

 

Geochemistry of tourmaline-bearing granite from Maras-Jong, Terengganu, Peninsular Malaysia

AZMAN A. GHANI

Department of Geology, University of Malaya, 50603 Kuala Lumpur

 

Abstract: The Eastern Belt Granite of Peninsular Malaysia consists mainly of I-type granites with subordinate S-type granites. The monzo- to syenogranite Maras-Jong pluton in the Eastern Belt Granite show many S-type characteristics such as presence of tourmaline, garnet, similar texture (both granites are coarse grained primary textured sometimes dominated by K-feldspar phenocrysts) and high SiO2 contents. However, using the previous granite classification, ACNK values below 1.1 and low Al biotite content, the Maras-Jong granite can be classified as I-type granite. It is suggested that the Maras-Jong granite is a felsic I-type granite.

 

Abstrak: Granit Jalur Timur di Semenenjung Malaysia mengandungi batuan granit jenis I dengan sedikit jenis S. Batuan monzogranit dan syenogranit pluton Maras-Jong di dalam Granit Jalur Timur menunjukkan banyak ciri-ciri granit jenis S seperti kehadiran mineral tourmalin, garnet, persamaan tekstur (kedua-dua granit adalah berbutir kasar bertekstur primer kadang kala didominasikan oleh fenokris K-feldspar) dan kandungan SiO2 yang tinggi. Walau bagaimanapun, menggunakan pengelasan yang terdahulu, nilai ACNK dibawah 1.1 dan mengandungi biotite kurang AI, Granit Maras-Jong boleh dikelaskan sebagai jenis I.