Geochemistry of Igneous Rocks of Citirem Formation and Its Implications for the Tectonic Setting in Ciletuh – Palabuhanratu UNESCO Global Geopark Area
DOI:
https://doi.org/10.25299/jgeet.2024.9.1.14367Keywords:
igneous rocks, suprasubduction zone, MORB, CitiremAbstract
The igneous rocks of the Citirem Formation in the Ciletuh – Palabuhanratu UNESCO Global Geopark area petrographically not only consist of basalt, but also andesite, dacite, and gabbro. The characteristics of basalts Citirem Formation are composed of plagioclase 43% – 58% and olivine, mostly have amygdaloidal and aphanitic textures. Andesites are composed of 45% – 65% plagioclase, absence of olivine, mostly aphanitic and trachytic, some have intergranular textures. Dacite comprises 50% plagioclase, 20% quartz, and the absence of olivine, and aphanitic, intersertal textures. Gabbros are composed of 62% plagioclase, 6% – 12% olivine, with phaneritic texture. Based on the plot of the major elements vs SiO2 diagram, MgO, FeOt (Fe2O3+FeO), CaO, and TiO2 show a negative correlation with SiO2. In comparison, Na2O and K2O show a positive correlation with SiO2. The lithology of igneous rocks of Citirem Formation are basalt, trachybasalt, basaltic trachyandesite, trachyandesite, andesite, dacite and gabbro based on a plot of the Na2O+K2O vs SiO2 diagram for volcanic and plutonic rocks. The origin of magma type can be distinguished based on the plot of K2O vs SiO2 diagrams, the igneous rocks of Citirem Formation are divided into low-K, medium-K, high-K, and shoshonite magma series. Dacite STA 2, andesite STA 7, basaltic andesite STA 8, trachyandesite STA 10 and gabbro STA 14 are calc-alkaline based on triangular diagram Th-Hf-Ta-Zr-Nb. Gabbro STA 17 indicates IAT (island arc tholeiite), trachybasalt STA 19, basalt STA 20 and basaltic trachyandesite STA 27 are E-MORB, WPT (within plate tholeiitic), In contrast, trachybasalt STA 28 is WPA (within plate alkali). Primitive mantle long, NMORB-normalized REE patterns and chondrites-normalized show some rocks have distinctive patterns that have similarities with suprasubduction zone ophiolite rocks, MORB of Mirdita ophiolite, and some show similarities with patterns from OIB and E-MORB.
Downloads
References
Dilek Y, Furnes H., 2011. Ophiolite genesis and global tectonics: Geochemical and tectonic fingerprinting of ancient oceanic lithosphere. Geological Society of America Bulletin 123: 387-411
Dilek Y, Furnes H, Shallo M., 2008. Geochemistry of the Jurassic Mirdita Ophiolite (Albania) and the MORB to SSZ evolution of a marginal basin oceanic crust. Lithos 100: 174-209.
Dilek Y, Thy P., 2009. Island arc tholeiite to boninitic melt evolution of the Cretaceous Kizildag (Turkey) ophiolite: Model for multi-stage early arc–forearc magmatism in Tethyan subduction factories. Lithos 113: 68-87
Gill, 1981. Orogenic andesites and Plate Tectonics. Volume 16, Minerals and Rocks. Berlin, Heidelberg, New York: Springer Verlag.
Haq, Hafidhah N., 2017. Petrologi Basalt Daerah Mandrajaya, Kecamatan Ciemas, Kabupaten Sukabumi, Provinsi Jawa Barat. SKRIPSI: Studi Petrologi Fakultas Teknik Geologi Universitas Padjadjaran.
Hardiyono, Adi, at al., 2023. New Consideration of Origin of The Gunung Badak Basaltic Lava, Ciletuh Area, Indonesia. Journal of Engineering Science and Technology Special Issue on AASEC2022. August (2022) 1-7. School of Engineering, Taylor’s University.
Ishizuka O, Tani K, Reagan MK., 2014. Izu-Bonin-Mariana forearc crust as a modern ophiolite analogue. Elements 10: 115-120
Klein, C., and Hurlbut, C.S., Jr., 1985. Manual of Mineralogy, Wiley, 20th ed., p.476 ISBN 0-471-80580-7
Metcalf R.V. dan Shervais, John W., 2008. Suprasubduction-zone ophiolites: Is there really an ophiolite conundrum? The Geological Society of America Special Paper 438 USA.
Middlemost, Eric A.K., 1994. Naming materials in the magma/igneousrock system. Earth Science Reviews, 37, 215-244.
Mulyaningsih, Sri., 2018. Kristalografi dan Mineralogi Edisi 1 2018. Yogyakarta: Akprind Press.
Pearce, J.A., 1982. Trace element characteristics of lavas from destructive plate boundaries, in Thorpe, R.S., ed., Andesites: Orogenic Andesites and Related Rocks: Chichester, UK, John Wiley & Sons, p.525–548.
Pearce, J.A., Lippard, S.J., and Roberts, S., 1984. Characteristics and tectonic significance of supra-subduction zone ophiolites, in Kokelaar, B.P., and Howells, M.F., eds., Marginal Basin Geology: Palo Alto, California, Blackwell Scientific Publications, p. 74–94.
Pearce JA., 2014. Immobile element fingerprinting of ophiolites. Elements 10: 101-108
Rosana, M. F. 2006. Geologi Kawasan Ciletuh Sukabumi: Karakteristik, Keunikan, dan Implikasinya. Bandung: Universitas Padjadjaran.
Rosana, M.F., Isnaniawardhani, V., Hardiyono, A., Helmi, F., Brilian, C.H., Nugraha, K.S.A., Saragih, K.D., Ardiansyah, N., Ikhram, R., Zulfaris, D.Y., Agustin, F., Faturrakhman. M.L. 2019, Geological Map of the Cikadal-Lengkong Sheet (1208-43 and 1208-64 map sheets), University of Padjadjaran and Geological Survey of Indonesia.
Sartono, S., dan Murwanto, H., 1987. Olitostrom sebagai batuan dasar di Jawa. proseding PIT XVI IAGI, 19.
Satyana, A.H., 2021. Ciletuh Subduction, Southwest Java – New Findings: Nature, Age, and Regional Implications. Proceedings of the Indonesian Petroleum Association, 45th Annual Convention and Exhibition.
Saunders, A.D., Tarney, J., Marsh, N.G., and Wood, D.A., 1980. Ophiolites as ocean crust or marginal basin crust; a geochemical approach, in Ophiolites: Proceedings of the International Ophiolite Symposium: Cyprus, Nicosia, p. 193–204.
Schiller, D.M., Garrard, R.A., Prasetyo Ludi., 1991. Eocene Submarine fan sedimentation in Southwest Java. Proceedings IPA ke 20, Jakarta.
Stern RJ, Bloomer SH., 1992. Subduction zone infancy: Examples from the Eocene Izu-Bonin-Mariana and Jurassic California arcs. GSA Bulletin 104: 1621-1636.
Streckeisen. A.L., 1976. “To Each Plutonic Rock Its Proper Name,” Earth Science Reviews, vol. 12, hal. 1–33.
Streckeisen, A. L., 1978. IUGS Subcommission on the Systematics of Igneous Rocks. Classification and Nomenclature of Volcanic Rocks, Lamprophyres, Carbonatites and Melilite Rocks. Recommendations and Suggestions. Neues Jahrbuch für Mineralogie, Abhandlungen, Vol. 141, 1-14.
Suhaeli, E.T., et al., 1977. The status of the melange complex in Ciletuh area, Southwest Java. Proceeding Indonesia Petroleum Assoc., 6th annual conv., hal 241-253.
Sukamto, Rab, 1975: Geologi Lembar Jampang dan Balekambang, Skala 1:100.000. Direktorat Geologi Bandung.
Sun S.S. dan McDonough W. F., 1989. Chemical and isotopic systematics of oceanic basalts: implication for mantle compotition and processes. Geol Soc. London. Spec. Pub. 42, pp. 313-345.
Thayyib, E.S., Said, E.L., Siswoyo, and Priyomarsono, S., 1977, The status of the melange complex in the Ciletuh area, South West Java, Proceedings Indonesian Petroleum Association, 6th Annual Convention,
Jakarta, 241-254.
Thompson, R.N., et al., 2014. An Assessment of the Relative Roles of Crust and Mantle in Magma Genesis: An Elemental Approach (and Discussion). Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 310, No. 1514, The Relative Contributions of Mantle, Oceanic Crust and Continental Crust to Magma Genesis (Apr. 27, 1984), pp. 549-590
Wood, D.A., 1980. The application of a Th-Hf-Ta diagram to problems of tectonomagmatic classification and to establishing the nature of crustal contamination of basaltic lavas of the British Tertiary volcanic province: Earth and Planetary Science Letters, v. 50, no. 1, p. 11–30,
Yang, Gaoxe., 2022. Subdution initiation triggered by collision: A review based on examples and models: Elsevier, Earth - Science Reviews, v. 232, September 2022, 104129
Downloads
Published
Issue
Section
License
Copyright (c) 2024 Journal of Geoscience, Engineering, Environment, and Technology
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Copyright @2019. This is an open-access article distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License which permits unrestricted use, distribution, and reproduction in any medium. Copyrights of all materials published in JGEET are freely available without charge to users or / institution. Users are allowed to read, download, copy, distribute, search, or link to full-text articles in this journal without asking by giving appropriate credit, provide a link to the license, and indicate if changes were made. All of the remix, transform, or build upon the material must distribute the contributions under the same license as the original.