relation: https://khub.utp.edu.my/scholars/14275/
title: Petrography and field study of andesitic ignimbrite in Temangan, Kelantan
creator: Shahman, N.S.
creator: James, E.
creator: Bahar, A.M.A.
creator: Hadhi, M.I.
creator: Anuar, N.
description: The volcanic rocks in Temangan, Kelantan consist of felsic to intermediate volcanic rocks, that is mainly of pyroclastic with rhyolitic, dacitic, and andesitic tuff. A geological review has been carried out in Kampung Bukit Besi, Temangan, in Kelantan, Malaysia, which is composed of schist, shale, andesite, and ignimbrite. In Temangan, andesite and ignimbrite show an intimate relationship, as the ignimbrite exists as the fragments and andesite as the matrix. The methodology used in this study are petrography and X-ray Diffraction (XRD) analyses, to determine the mineralogical composition of andesitic ignimbrite. Andesite shows aphenitic and porphyritic textures and consist of pyroxene, plagioclase, alkali feldspar, quartz, biotite and iron oxides. A range of plagioclase textures indicate imperfect equilibrium condition from andesite, reflecting plagioclase dissolution and regrowth. The structural analysis suggest that thrust fault occurred in the study area. Andesite and ignimbrite of the two stages are suggested to have derived from the andesite magma eruption which produced pyroclastic flow eruptions in small amount in most caldera volcanoes at high temperature gradient. © 2021 by the Author(s).
publisher: Geological Society of Malaysia
date: 2021
type: Article
type: PeerReviewed
identifier:   Shahman, N.S. and James, E. and Bahar, A.M.A. and Hadhi, M.I. and Anuar, N.  (2021) Petrography and field study of andesitic ignimbrite in Temangan, Kelantan.  Bulletin of the Geological Society of Malaysia, 72.  pp. 223-232.  ISSN 01266187     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120559845&doi=10.7186%2fbgsm72202118&partnerID=40&md5=de7db3844404a0ebf836cfd838aabcea
relation: 10.7186/bgsm72202118
identifier: 10.7186/bgsm72202118