Bulletin of the Geological Society of Malaysia, Volume 46, May 2003, pp. 25 – 29
Program Geologi, Pusat Pengajian Sains Sekitaran dan Sumber Alam, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor
e-mail: umor@pkrisc.cc.ukm.my
Abstrak: Granit Bukit Tujuh masih belum dikaji secara terperinci, terutama cirian geokimia bagi menentukan jenis magma pembentuk batuan dan asalan magma. Oleh itu, kajian dilakukan bagi menentukan cirian geokimia Granit Bukit Tujuh dan membandingkannya dengan batuan di Kompleks Granit Benta dan Suit Stong. Didapati ketiga-tiga unit batuan ini tergolong dalam batuan subalkali dengan siri magma kalk-alkali hingga shoshonit, dan dari granit jenis I, iaitu asalan igneus. Ia diperkuatkan dengan tren unsur nadir bumi yang menunjukkan tiada anomaly Eu seperti Suit Stong dan Kompleks Granit Benta. Oleh itu, disimpulkan batuan igneus Bukit Tujuh juga adalah hasilan pasca-orogenis.
Abstract: Previous studies made of Bukit Tujuh granite is not in detail, especially on their geochemistry to determine the magma type and the origin of rock. This study was made to list their geochemical characteristics and make a comparison with Benta Granite Complex and Stong Suite. We found that all the units of rocks can be included as subalkaline rocks within calc-alkaline until shoshonite series, and classified as I-type granite, which is interpreted as of igneous origin. This argument is supported by the REE trend that depicted no Eu anomaly similar to Stong Suite and Benta Granite Complex. Therefore, we conclude that the granite of Bukit Tujuh is also post-orogenic.
https://doi.org/10.7186/bgsm46200305
