Radiometric age of Kampung Awah andesite

702001-100589-388-B
Author : Wan Fuad Wan Hassan & Heru Sigit Purwanto
Publication : Bulletin of the Geological Society of Malaysia
Page : 51-54
Volume Number : 48
Year : 2004
DOI : https://doi.org/10.7186/bgsm48200411

Bulletin of the Geological Society of Malaysia, Volume 48, June 2004, pp. 51-54

 

Radiometric age of Kampung Awah andesite

WAN FUAD WAN HASSAN1 & HERU SIGIT PURWANTO2

1School of Environmental Science and Natural Resources, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor Darul Ehsan

2Geology Department, Faculty of Mineral Technology, University of National Development, Yogyakarta, Indonesia

 

Abstract: The age of andesite from Kampung Awah in particular and the Peninsular Malaysia in general, is reported as Upper Permian. A sample from Kampung Awah andesite was sent for K-Ar radiometric dating. The result obtained is 269±46 Ma or Middle Permian age. The result indicates that contrary to earlier belief, the andesite of Kampung Awah was extruded earlier, viz. in Middle Permian and that limestone was subsequently deposited on the cooled andesite much later, in the Upper Permian period. An older age for the andesite is also supported by field and petrological evidences.

Abstrak: Usia andesite Kampung Awah khususnya dan bagi Semenanjung Malaysia umumnya dianggap sebagai Perm Atas. Suatu sampel andesit dari Kampung Awah telah di hantar untuk di buat penentuan usia secara radiometri K-Ar. Hasil diperolehi ialah usia 269±46 juta tahun atau Perm Tengah. Hasil ini menunjukkan, berbeza daripada pandangan lalu, bahawa andesit Kampung Awah menerobos ke permukaan lebih awal iaitu pada Perm Tengah, diikuti kemudian dengan pengendapan batu kapur di atas andesit yang telah sejuk, pada Perm Atas. Usia lebih tua bagi andesit ini disokong oleh bukti-bukti lapangan dan juga petrologi.

https://doi.org/10.7186/bgsm48200411


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