TY - JOUR
T1 - Permian ultrafelsic a-type granite from Besar Islands group, Johor, peninsular Malaysia
AU - Ghani, Azman A.
AU - Hazad, Fatin Izzani
AU - Jamil, Azmiah
AU - Xiang, Quek Long
AU - Wan Ismail, Wan Nur Atiqah
AU - Chung, Sun Lin
AU - Lai, Yu Ming
AU - Roselee, Muhammad Hatta
AU - Islami, Nur
AU - Nyein, Kyaw Kyaw
AU - Hassan, Meor Hakif Amir
AU - Bakar, Mohd Farid Abu
AU - Umor, Mohd Rozi
N1 - Funding Information:
This work presents a preliminary study of the Johor Island, southeast of peninsular Malaysia. The field work on these islands was done by AAG with the help from FI, WAWI, QLX, KKN, AJ, MHR, and MFAB. The geochemical work sponsored by University Malaya Research Grant No. RG041/09AFR and University Malaya PPP Grant No. PV087/2012A. Geochronological analyses were done in Department of Geosciences, National Taiwan University (under the supervision of SLC and YML) and partly sponsored by High Impact Research Grant UM/MOHE No. (UMC/HIR/MOHE/SC/27) and Post Graduate Research Grant PG095-2012B. AAG acknowledge NSC Grant No. 101-2811-M-002-133 (Republic of China) for fellowship in the Department of Geoscience, National Taiwan University, where most of the manuscript was written. The manuscript benefited from comments and suggestions by Dr N A Majid and the two reviewers are greatly acknowledged.
Publisher Copyright:
© Indian Academy of Sciences.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - The granitic rocks of the peninsula have traditionally been divided into two provinces, i.e., Western and Eastern provinces, corresponding to S- and I-type granite respectively. The Western Province granite is characterised by megacrystic and coarse-grained biotite, tin-mineralised, continental collision granite, whereas, the Eastern Province granite is bimodal I-type dominated by granodiorite and associated gabbroic of arc type granite. This paper reports the occurrence of an A-type granite from peninsular Malaysia. The rocks occur in the Besar, Tengah, and Hujung islands located in the southeastern part of the peninsula. The granite is highly felsic with SiO2 ranging from 75.70% to 77.90% (differentiation index = 94.2–97.04). It is weakly peraluminous (average ACNK=1.02), has normative hypersthene (0.09–2.19%) and high alkali content (8.32–8.60%). The granites have many A-type characteristics, among them are shallow level of emplacement, high Ga, FeT/MgO and low P, Sr, Ti, CaO and Nb. Calculated zircon saturation temperatures for the Besar magma ranging from 793◦ to 806◦C is consistent with high temperature partial melting of a felsic infracrustal source which is taken as one of the mechanisms to produce A-type magma. The occurrence of the A-type granite can be related to the extensional back arc basin in the Indo-China terrane during the earliest Permian.
AB - The granitic rocks of the peninsula have traditionally been divided into two provinces, i.e., Western and Eastern provinces, corresponding to S- and I-type granite respectively. The Western Province granite is characterised by megacrystic and coarse-grained biotite, tin-mineralised, continental collision granite, whereas, the Eastern Province granite is bimodal I-type dominated by granodiorite and associated gabbroic of arc type granite. This paper reports the occurrence of an A-type granite from peninsular Malaysia. The rocks occur in the Besar, Tengah, and Hujung islands located in the southeastern part of the peninsula. The granite is highly felsic with SiO2 ranging from 75.70% to 77.90% (differentiation index = 94.2–97.04). It is weakly peraluminous (average ACNK=1.02), has normative hypersthene (0.09–2.19%) and high alkali content (8.32–8.60%). The granites have many A-type characteristics, among them are shallow level of emplacement, high Ga, FeT/MgO and low P, Sr, Ti, CaO and Nb. Calculated zircon saturation temperatures for the Besar magma ranging from 793◦ to 806◦C is consistent with high temperature partial melting of a felsic infracrustal source which is taken as one of the mechanisms to produce A-type magma. The occurrence of the A-type granite can be related to the extensional back arc basin in the Indo-China terrane during the earliest Permian.
KW - A-type granite
KW - Eastern belt
KW - Johor island
KW - Peninsular malaysia
KW - Ultrafelsic granite
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U2 - 10.1007/s12040-014-0501-5
DO - 10.1007/s12040-014-0501-5
M3 - Article
AN - SCOPUS:84924188597
VL - 123
SP - 1857
EP - 1878
JO - Journal of Earth System Science
JF - Journal of Earth System Science
SN - 2347-4327
IS - 8
ER -