ISSN
print 2570-7337
online 2570-7345
REE content of volcanic rocks and their weathered horizons in the Muria Volcanic Complex, Central Java, Indonesia
Klíčová slova
Abstrakt
We investigated bedrock samples and their weathered horizons collected from the Muria Volcanic Complex (MVC), Central Java, Indonesia. In addition to petrographic study, samples were analysed using X-ray diffraction (XRD), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and inductively coupled plasma-mass spectrometry (ICP-MS) for mineral composition, major elements, and trace elements, respectively. Bedrock samples (n = 10) from the MVC have ΣREE ranging from 364 to 739 ppm (avg. 579 ppm). Basanite (n = 2) and phonotephrite (n = 2) are consistently high in ΣREE (659 - 739 ppm) compared with basaltic trachyandesite, trachyandesite, and trachyte. Apatite is the only REE-bearing mineral observed in basanite and phonotephrite (up to ~1 vol.%). The ΣREE is positively corelated with P2O5, which inversely corelates with SiO2. The weathered horizons contain clay minerals that consist primarily of kaolinite ± halloysite. The REE content of the weathered horizons (n = 7) is up to 183 ppm higher than those of the bedrocks. The decrease in CaO and P2O5 indicates a fractionation of apatite at early stage of magma evolution, resulting in the depletion in the ΣREE content in the residual melt. We suggest that apatite is the major host of REE in the MVC alkali-rich, silica-undersaturated volcanic rocks, as evidenced by our petrographic and geochemical data. We also suggest that the increase in ΣREE in the weathered horizon is due to the presence of clay minerals, particularly kaolinite and halloysite.
Soubory
Reference
Bao ZW, Zhao ZH (2008) Geochemistry of mineralization with exchangeable REY in the weathering crusts of granitic rocks in South China. Ore Geol Rev 33: 519-535 https://doi.org/10.1016/j.oregeorev.2007.03.005
Bemmelen RW VAN (1949) The Geology of Indonesia. Martinus Nijhoff, Den Haag
Berger A, Janots E, Gnos E, Frei R, Bernier F (2014) Rare earth element mineralogy and geochemistry in a laterite profile from Madagascar. Appl Geochem 41: 218-228 https://doi.org/10.1016/j.apgeochem.2013.12.013
Chi RA, Tian J, Luo XP, Xu ZG, He ZY (2012) The basic research on the weathered crust elution-deposited rare earth ores. Nonferrous Metal Sci Engineer 3: 1-13 (in Chinese with English abstract)
Cundari A (1980) Role of subduction in the genesis of leucite-bearing rocks: facts or fashion? (reply to A. D. Edgar‘s discussion paper). Contrib Mineral Petrol 73: 432-434 https://doi.org/10.1007/bf00376636
Edwards C, Menzies M, Thirlwall M (1991) Evidence from Muriah, Indonesia, for the interplay of supra-subduction zone and intraplate processes in the genesis of potassic alkaline magmas. J Petrol 32: 555-592 https://doi.org/10.1093/petrology/32.3.555
Goodenough KM, Wall F, Merriman D (2018) The Rare Earth Elements: Demand, global resources, and challenges for resourcing future generations. Nat Resour Res 27: 201-216 https://doi.org/10.1007/s11053-017-9336-5
Hamilton W (1977) Subduction in the Indonesian region. A. Geophys Union Maurice Ewing Series 1: 15-31
Hoshino M, Sanematsu K, Watanabe Y (2016) REE Mineralogy and Resources, Handbook on the Physics and Chemistry of Rare Earths: 129-291. Elsevier https://doi.org/10.1016/bs.hpcre.2016.03.006
Hutchison CS (1981) Review of the Indonesian volcanic arc. The geology and tectonics of eastern Indonesia. Spec Publ Geol Res Dev Centre 2: 65-80
Hutchison CS (1982) Indonesia. In: Andesites: orogenic andesites and related rocks: 207-224. Wiley, New York
Le Couteur P (2011) Geological report on the Chambe Basin area of exclusive prospecting license EPL0325/11 Mulanje Massif, Southern Malawi, East Africa. 1-101, Vancoucer, Micron Geological Ltd
Leterrier J, Yuwono YS, Soeria-Atmadja R, Maury RC (1990) Potassic volcanism in Central Java and South Sulawesi, Indonesia. J Southeast Asian Earth Sci 4: 171-187 https://doi.org/10.1016/s0743-9547(05)80011-x
Li Z, Hu JZ (2017) World rare earth resources survey and development utilization trend. Mod Min 33: 97-105 (In Chinese with English abstract).
Li YHM, Zhao WW, Zhou MF (2017) Nature of parent rocks, mineralization styles and ore genesis of regolith hosted REE deposits in South China: An integrated genetic model. J Asian Earth Sci 148: 65-95 https://doi.org/10.1016/j.jseaes.2017.08.004
Mcbirney AR, Serva L, Guerra M, Connor CB (2003) Volcanic and seismic hazards at a proposed nuclear power site in Central Java. J Volcanol Geotherm Res 126: 11-30 https://doi.org/10.1016/s0377-0273(03)00114-8
Mukai H, Kon Y, Sanematsu K, Takahashi Y, Ito M (2020) Microscopic analyses of weathered granite in ion-adsorption rare earth deposit of Jianxi Province, China. Sci Rep 10: 20194 https://doi.org/10.1038/s41598-020-76981-8
Qin F, Tan J, Zhou YQ, Meng XL (2019) Characteristics and genesis of ion-adsorbed rare-earth deposits in volcanic weathering crust in Chongzuo area of Guangxi. Mineral Res Geol 033: 234-241 (in Chinese with English abstract)
Rocha A, Schissel D, Sprecher A, De Tarso P, Goode J (2013) Process development for the Serra Verde weathered crust elution-deposited rare earth deposit in Brazil. Proceedings of the 52nd Conference of Metallurgists (COM 2013)
Sanematsu K, Watanabe Y (2016) Characteristics and genesis of ion adsorption-type rare earth element deposits. Rev Econ Geol. Soc Econ Geol: 55-79 https://doi.org/10.5382/rev.18.03
Sanematsu K, Murakami H, Watanabe Y, Duangsurigna S, Siphandone V (2009) Enrichment of rare earth elements (REE) in granitic rocks and their weathered crusts in central and southern Laos. Bull Geol Surv Japan 60: 527-558 https://doi.org/10.9795/bullgsj.60.527
Setiawan I, Takahashi R, Imai A (2017) Petrochemistry of granitoids in Sibolga and its surrounding areas, North Sumatra, Indonesia. Resour Geol 67(3): 254-278 https://doi.org/10.1111/rge.12132
Wang ZY, Fan HR, Zhou L, Yang KF, She HD (2020) Carbonatite-related REE deposits: An overview. Minerals 10: 965 https://doi.org/10.3390/min10110965
Wu CY, Huang DH, Guo ZX (1990) REE geochemistry in the weathered crust of granites, Longnan area, Jiangxi Province. Acta Geol Sin Engl 3: 193-209 https://doi.org/10.1111/j.1755-6724.1990.mp3002006.x
Xie YL, Hou, ZQ, Goldfarb RJ, Guo X, Wang L (2016) Rare Earth Element Deposits in China. Rev Econ Geol. Soc Econ Geol: 115-136 https://doi.org/10.5382/rev.18.06
Zhang SJ, Zhang, LW, Zhang YW, Shang L, Li JB (2020) Summarize on rare earth mineral resources and their distribution at home and abroad. Inorg Chem Ind 52: 9-16 (In Chinese with English abstract)