Bulletin of the Geological Society of Malaysia, Volume 45, May 2002, pp. 51 – 58
Program Geologi, Pusat Pengajian Sains Sekitaran dan Sumber Alam, Fakulti Sains dan Teknologi, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor
Abstrak: Tren geokimia unsur-unsur nadir bumi (REE) telah digunakan bagi mentafsir asalan dan proses evolusi batuan-batuan Suit Stong. Sebanyak 19 sampel daripada empat litodemik batuan yang dinamakan sebagai Tonalit Berangkat, Granit Noring, Mikrogranit Noring dan Leukogranit Kenerong telah dianalisis. Tren geokimia unsur-unsur nadir bumi menunjukkan arah pembezaan batuan adalah dari Tonalit Berangkat, Leukogranit Kenerong, Mikrogranit Noring ke Granit Noring. Berdasarkan bandingan LREE dan HREE pula disimpulkan Mikrogranit Noring mengalami peleburan separa membentuk Granit Noring. Anomali normal Eu yang diperolehi menunjukan Tonalit Berangkat, Leukogranit Kenerong dan Mikrogranit Noring berasalan granit jenis I, sementara Granit Noring yang beranomali Eu negatif mencirikan asalan granit jenis S. Kajian ini merupakan satu dimensi baru bagi Suit Stong, memandangkan belum ada kajian terdahulu yang mengemukakan hasil analisis geokimia unsur-unsur nadir bumi.
Abstract: The geochemical trends of the rare earth elements (REEs) were employed to reveal the origin and evolution of rocks within the Stong Suite. 19 samples from the four lithodemic units of the suite, namely Berangkat Tonalite, Noring Granite, Noring Microgranite, and Kenerong Leucogranite were analysed. The REEs geochemical trends suggest that the differentiation order is Berangkat Tonalite, Kenerong Leucogranite, Noring Microgranite, and Noring Granite. Based on the LREE and HREE trends, it is suggested that Noring Granite is the partial crystallization product of Noring Microgranite. The normal anomaly Eu of Berangkat Tonalite, Kenerong Leucogranite and Noring Microgranite favour their I-type granitic origin, in contrast to S-type nature of Noring Granite, as shown by its negative Eu anomaly. This study opens a new dimension as the REE geochemical data of Stong Suite has never been published.
https://doi.org/10.7186/bgsm45200208
