Ega Gita Prasastia(1*), Lucas Donny Setijadji(2), I Wayan Warmada(3)

(1) Department of Geological Engineering, Gadjah Mada University,
(2) Department of Geological Engineering, Gadjah Mada University,
(3) Department of Geological Engineering, Gadjah Mada University,
(*) Corresponding Author


This research objective is to identify geochemical and
mineralogical characteristics of Rare earth elements
(REE) in the weathering products of Anggi Granite, which is located in Manokwari Regency, West
Papua, Indonesia. The research is conducted on 7
samples of fresh rocks and 7 samples of weathered
rocks of Anggi Granite. The research analysis consists of petrography, XRD, XRF, and sequential extraction experiment, supported by secondary data
and references. Anggi Granite is S-type and peraluminous granite that contains zircon, monazite and
apatite as a rare earth bearing minerals. Weathering products of Anggi Granite do not have a significant enrichment of REE, even some of the samples
are depleted in REE. REE in weathered Anggi Granite are dominantly present in the primary minerals,
mostly in zircon and monazite. Extractable form
of geochemical fractions include crystalline Fe-oxide
occluded fraction (ilmenite, hematite and goethite),
and ion-exchangeable (illite, kaolin and chlorite).
Enrichment of REE in the weathered Anggi Granite is influenced by the presence of resistant REEbearing minerals, in the forms of zircon and monazite, degree of weathering related to the presence
of secondary minerals, and other factors such as pH
and Eh


Anggi Granite, REE, Weathering, Sequential extraction experiment, Geochemical fraction

Full Text:



Bao, Z. dan Zhao, Z. ( 2008) Geochemistry of mineralization with exchangeable REY in the weathering crust of granitic rocks in south China. Ore Geology Reviews 33: 519–535. Bea, F. (1996) Residence of REE, Th, and U in granites and crustals protoliths; implications for the chemistry of crustal melts. Journal of Petrology 37: 521–552. Braun, J., Pagel, M., Muller, J., Bilong, P., Michard, A., Guillet, B. (1990) Cerium anomalies in lateritic profiles. Geochimica es Cosmochimica Acta 54: 781–795. Castor, S. B., Hedrick, J. B. (2006) Rare Earth Elements. Industrial Minerals 7th edition, Society for Mining, Metallurgy, and Exploration, Littleton, Colorado. Filgueiras, A.V., Lavilla, I., Bendicho, C. (2002) Chemical sequential extraction for metal partitioning in environmental solid samples. Journal of Environment Monitoring 4: 823– 857. Harahap, B.H., Hakim, A.S., Hartono, U. (1998) Upper Paleozoic-Lower Mesozoic magmatic intrusions in Western Irian Jaya. Jurnal Geologi dan Sumber Daya Mineral 8:2–13. Henderson, P. (1986) Rare Earth Elements Geochemistry, Elsevier Science Publishers B.V., Netherlands. Hu, Z., Haneklaus, S., Sparovek, G., Schnug, E. (2006) Rare earth elements in soils. Communications in Soil Science and Plant Analysis 37: 1381–1420. Ma, L., Jin, L., Brantley, S.L. (2007) How mineralogy and slope aspect affect REE release and fractination during shale weathering in the Susquehanna / Shale Hills Critical Zone Observatory. Chemical Geology 290: 31–49. Mason, B., Moore, C.B. (1982) Principles of Geochemistry. 4th Edition, John Wiley and Sons, Inc., New York. McDonough, W.F., Sun, S. (1995) The composition of the earth. Chemical Geology 120: 223– 253. Miller, W.P., Martens, D.C., Zelazny, L.W. (1986) Effect of sequence in extraction of trace metals from soils. Soil Science Society of America Journal 50: 587–601. Okoro, H.K., Fatoki, O.S., Adekola, F.A., Ximba, B.J. Snyman, R.G. (2012) A review of sequential extraction procedures for heavy metals speciation in soil and sediments. Open acces scientific reports, vol. 1, issue 3. Pieters, P.E., Hakim, A.S., Atmawinata, S. (1990) Geologi Lembar Ransiki, Irian Jaya, Pusat Penelitian dan Pengembangan Geologi, Departemen Pertambangan dan Energi, Bandung. Price, R.C., Gray, C.M., Wilson, R.E., Frey, F.A., Taylor, S.R. (1991) The effects of weathering on rare-earth element, Y and Ba abundances in Tertiary basalts from southeastern Australia. Chemical Geology 93: 245–265. Sanematsu, K., Murakami, H., Watanabe, Y., Duangsurigna, S., Vilayhack, S. (2009) Enrichment of rare earth elements (REE) in granitic rocks and their weathered crusts in Central and Southern Laos. Bulletin of the Geological Survey of Japan 60: 527–558. Sarira, J.N. (2013) Petrogenesa dan Potensi Mineralisasi pada Granit Anggi, Kabupaten Manokwari, Propinsi Papua Barat, Thesis, Jurusan Teknik Geologi Universitas Gadjah Mada, Yogyakarta. Tessier, A., Campbell, P.G.C., Bisson, M. (1979) Sequential extraction procedure for the speciation of particulate trace metals. Analytical Chemistry 7: 844–851. Yusoff, Z.M., Ngwenya, B.T., Parsons, I. (2013) Mobility and fractionation of REEs during deep weathering of geochemically contrasting granites in a tropical setting, Malaysia. Chemical Geology 349–350: 71–86.

DOI: https://doi.org/10.22146/jag.26978

Article Metrics

Abstract views : 1761 | views : 1550


  • There are currently no refbacks.

Copyright (c) 2022 Ega Gita Prasastia, Lucas Donny Setijadji, I Wayan Warmada

Journal of Applied Geology Indexed by:


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