Kandungan Rare Earth Elements pada Granitoid Merah Muda dari Daerah Lagoi dan Perbandingan dengan Granitoid Sejenis Lain

Ronaldo Irzon, Hamdan Z. Abidin, Baharuddin Baharuddin, Purnama Sendjadja, Kurnia Kurnia

Abstract


Intrusi granitoid berumur Trias di Pulau Bintan termasuk dalam kelompok The Main Range Granite Province of South East Asia. Satuan granitoid tersebut tersebar hingga melebihi 30% dari seluruh satuan batuan di Pulau Bintan. Secara megaskopik, beberapa warna granotoid yang berbeda dijumpai di daerah ini. Kawasan Lagoi, yang berada di pantai utara Bintan, memiliki granitoid dengan ciri spesifik yakni berwarna merah muda (pinkish). Kandungan unsur tanah jarang dalam pinkish granitoid ini cukup tinggi, berkisar antara 170 – 1.015 ppm dengan rata-rata 295 ppm. Nilai unsur tanah jarang ini diplot dalam Spider Diagram untuk dibandingkan dengan intrusi granitoid berwarna sama di daerah lain. Di samping itu, nilai unsur tanah jarang di sini dapat menjadi data nasional. Anomali Eu negatif terdeteksi dalam contoh pinkish granitoid yang menunjukkan bahwa fraksinasi mineral plagioklas terjadi dalam batuan.

Kata Kunci: geokimia, Lagoi, pinkish granitoid, unsur tanah jarang.


Full Text:

PDF

References


Ashwal, L.D, Demaiffe, D. and Torsvik, T.H. 2002. Petrogenesis of Neoproterozoic Granitoids and Related Rocks from the Seychelles: the Case for an Andean-type Arc Origin. Journal of Petrology, v.43, no.1: 45-83.

el-Baghdadi, M., el-Boukhari, A., Jouider, A., Benyoucef, A. and Nadem S., 2003. Calc-alkaline Arc I-type Granitoid Associated with S-type Granite in the Pan-African Belt of Eastern Anti-Atlas (Saghro and Ougnat, South Morocco). Gondwana Research, v.6, no.4: 557-572.

Barber, A.J., Crow, M.J. and Milsom, J.S., 2005. Sumatra Geology, Resources and Tectonic Evolution. Geological Society Memoir no.31. The Geological Society. London

Ghani A.A., 2005. Highly evolved S type granite: Selim Granite, Main Range Batholith, Peninsular Malaysia. Geological Society of Malaysia Bulletin, v.51: 95-101

Ghani A.A., Yusoff, I., Hassan M.H.A., and Ramli., 2013. Geochemical Study of Volcanic and Associated Granitic Rocks from Endau Rompin, Johor, Peninsular Malaysia. Journal of Earth System Science, v. 122 , no. 1: 65 – 78.

Irzon, R. and Permanadewi, S., 2010. Elements Study of Igneous and Altered Rocks in Kulonprogo and Its Surrounding Using ICP-MS. Proceeding PIT IAGI, Lombok: 1-10

Irzon, R., 2015. Contrasting Two Facies of Muncung Granite in Lingga Regency Using Major, Trace, and Rare Earth Element Geochemistry. Indonesian Journal on Geoscience, v.2, no.1: 23-33

Kusnama, Sutisna, K., Amin, T.C., Koesoemadinata, S., Sukardi dan Hermanto, B. 1994. Peta Geologi Lembar Tanjung Pinang, Sumatera Skala 1:250.000. Pusat Penelitian dan Pengembangan Geologi, Bandung.

Majumdar, D. and Dutta, P. 2014. Rare earth element abundances in some A-type Pan-African granitoids of Karbi Hills, North East India. Current Science, v. 107, no.12: 2023-2029.

McDogough, W.F. and Sun, S. 1995. The Composition of the Earth. Chemical Geology, v.120: 223-253.

Nagudi B., Koeberl, C. and Kurat, G. 2003. Petrography and geochemistry of the Singo granite, Uganda, and implications for its origin. Journal of African Earth Sciences, v. 36: 73–87.

Nono, G.D.K., Nzenti, J.P., Suh, C.E. and Ganno, S. 2010. Geochemistry of Ferriferous, High-K Calc-Alkaline Granitoids from the Banefo-Mvoutsaha Massif (NE Bafoussam), Central Domain of the Pan-African Fold Belt, Cameroon. Open Geology Journal, v.4: 15-28.

Perez-Soba, C. and Villaseca, C. 2010. Petrogenesis of highly fractionated I-type peraluminous granites: La Pedriza pluton (Spanish Central System). Geologica Acta, vol.8, no. 2: 131-149

Tagudi B., Koeberl, C., and Kurat G. 2003. Petrography and Geochemistry of The Singo Granite, Uganda, and Implications for Its Origin. Journal of African Earth Sciences, v. 36:73–87

Searle, M.P., Whitehouse, M.J., Robb, L.J., Ghani A.A., Hutchinson, C.S., Sone, M., Ng, S.W.-P., Roselee, M.H., Chung, S.-L., and Oliver, G.J.H., 2012. Tectonic Evolution of The Sibumasu-Indochina Terrane Collision Zone in Thailand and Malaysia: Constraints from New U-Pb Zircon Chronology of SE Asian Tin Granitoids. Journal of the Geological Society, London, v. 169: 489 – 500.

Shahin, H.A.E.R.A and Masoud, M.S. 2014. Hydrothermally Altered and Fractured Granite Hosting Rare Metals at Gabal Adara Adatalob, Southeastern Desert, Egypt. Earth Sciences, v. 3: 1-7.

Singh, L.G. and Vallinayagam, G., 2012. Petrological and Geochemical Constraints in the Origin and Associated Mineralization of A-Type Granite Suite of the Dhiran Area, Northwestern Peninsular India. Geosciences, v.2, no.4: 66-80.




DOI: http://dx.doi.org/10.33332/jgsm.geologi.v18i3.238

Refbacks

  • There are currently no refbacks.


Copyright (c) 2017 Ronaldo Irzon, Hamdan Z. Abidin, Baharuddin Baharuddin, Purnama Sendjadja, Kurnia Kurnia

Indexing Site :
Google Scholar ISJD LIPI Portal Garuda IPI

Sinta(Science and Technology Index) Garuda(Garda Rujukan Digital Crossref


Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

 

View JGSM Statistics