Fasies gunungapi, dan evolusi magmatik berdasarkan analisis geokimia Kompleks Todoko-Ranu, Kecamatan Sahu, Halmahera, Maluku Utara

Sari Bahagiarti Kusumayudha, Lotong Laratmase, Agus harjanto

Submitted : 2024-10-27, Published : 2025-05-20.

Abstract

The Todoko-Ranu volcanic complex is situated in the Sahu District, West Halmahera Regency, North Maluku. Geomorphologically, this area shows various volcanic landforms, reflecting the development and changes in the characteristics of eruptive activities. Eruption characteristic of a volcano is influenced by the physical and chemical properties of magma. Todoko-Ranu volcanic complex was built by volcanic products, including lava deposits, pyroclastic deposits and lahar deposits, which have different geochemical compositions. Due to the variety compositions of rocks, it is important to carry out studies on magmatic evolution based on geochemical analysis in the area. This study is useful for knowing the characteristics of the eruption at that time. Thus, the aim of this research is to study and analyze the geochemistry of volcanic rocks in order to determine the magmatic evolution of the Todoko-Ranu volcanic complex. The method applied is mapping the distribution of rocks and geological structures, testing rock samples for petrographic analysis and geochemical analysis, then studying magmatic processes. The results of the study show that the volcanic rocks of the Todoko-Ranu complex originate from calc-alcaline and tholeiitic magma which was formed from oceanic plate partial melting in a convergent tectonic environment, then underwent an evolution from alkaline to more acidic due to the process of magma differentiation and assimilation.

Keywords

Volcanic facies Magmatic evolution Calc-alcaline Magma differentiation Todoko-Ranu

References

T. , & S. D. Apandi, “Peta Geologi Lembar Ternate, Maluku Utara, Skala 1:250.000,” Bandung, 1980.

S. Supriatna, “eta Geologi Lembar Morotai, Maluku Utara = Geologic Map of the Morotai Quadrangle, North Maluku,” Bandung, 1980.

A. J. , & W. S. Barber, “The Geology and Tectonics of Eastern Indonesia: Proceedings of the CCOP-IOC SEATAR Working Group Meeting, Bandung, Indonesia,” Bandung, Jul. 1979.

R. Hall, “Plate boundary evolution in the Halmahera region, Indonesia,” Tectonophysics, vol. 144, no. 4, pp. 337–352, Dec. 1987, doi: 10.1016/0040-1951(87)90301-5.

R. HALL, M. G. AUDLEY-CHARLES, F. T. BANNER, S. HIDAYAT, and S. L. TOBING, “Basement rocks of the Halmahera region, eastern Indonesia: a Late Cretaceous–early Tertiary arc and fore-arc,” J Geol Soc London, vol. 145, no. 1, pp. 65–84, Jan. 1988, doi: 10.1144/gsjgs.145.1.0065.

S. Bronto, “Fasies gunung api dan aplikasinya,” Indonesian Journal on Geoscience, vol. 1, no. 2, pp. 59–71, Jun. 2006, doi: 10.17014/ijog.1.2.59-71.

J. , D. M. , & A. R. McPhie, “Volcanic Textures: A Guide to the Interpretation of Textures in Volcanic Rocks.,” Tasmania, 1993.

I. , & M. K. M. Bogie, “The application of a volcanic facies model to an andesitic stratovolcano hosted geothermal system at Wayang Windu, Java, Indonesia,” in Proceedings of the 20th New Zealand Geothermal Workshop, New Zealand, 1998, pp. 256–270.

M. , S. H. , & T. J. J. Alzwar, Pengantar Dasar Ilmu Gunungapi. Bandung: Nova, Bandung, 1988.

A. Peccerillo and S. R. Taylor, “Geochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey,” Contributions to Mineralogy and Petrology, vol. 58, no. 1, pp. 63–81, 1976, doi: 10.1007/BF00384745.

B. , & S. I. Setyanta, “Model struktur subdaksi kerak di perairan Laut Maluku dan vulkanisme berdasarkan analisis gaya berat dan kegempaan,” Jurnal Sumber Daya Geologi, vol. 21, no. 4, pp. 213–223, 2011.

J. C. Eichelberger, “Silicic Volcanism: Ascent of Viscous Magmas from Crustal Reservoirs,” Annu Rev Earth Planet Sci, vol. 23, no. 1, pp. 41–63, May 1995, doi: 10.1146/annurev.ea.23.050195.000353.

A. L. Streckeisen, “Classification and nomenclature of volcanic rocks, lamprophyres, carbonatites, and melilitic rocks: Recommendations and suggestions of the IUGS Subcommission on the Systematics of Igneous Rocks,” Geology, vol. 7, no. 7, pp. 331–335, 1979.

M. J. L. BAS, R. W. L. MAITRE, A. STRECKEISEN, and B. ZANETTIN, “A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram,” Journal of Petrology, vol. 27, no. 3, pp. 745–750, Jun. 1986, doi: 10.1093/petrology/27.3.745.

F. J. Pettijohn, Sedimentary Rocks (2nd ed.), 2nd ed. New York: Harper and Brothers, New York., 1957.

R. V. FISHER and G. A. SMITH, “VOLCANISM, TECTONICS AND SEDIMENTATION,” in Sedimentation in Volcanic Settings, SEPM (Society for Sedimentary Geology), 1991, pp. 1–5. doi: 10.2110/pec.91.45.0001.

R. A. F. , & W. J. V Cas, Volcanic Successions: Modern and Ancient. London.: Allen and Unwin, , 1987.

Surono, “Litostratigrafi Pegunungan Selatan bagian Timur Daerah Istimewa Yogyakarta dan Jawa Tengah,” Jurnal Sumber Daya Geologi, vol. 19, no. 3, pp. 209–221, 2009.

S. Mulyaningsih, S. Bronto, A. Kusnaedi, I. Simon, and I. W. Prasetyanto, “Vulkanisme kompleks Gunung Patiayam di Kecamatan Jekulo, Kabupaten Kudus, Provinsi Jawa Tengah,” Indonesian Journal on Geoscience, vol. 3, no. 2, pp. 75–88, Jun. 2008, doi: 10.17014/ijog.3.2.75-88.

L. Laratmase, S. B. Kusumayudha, and A. Harjanto, “Geochemical Correlation of Volcanic Rocks and Groundwater Quality in the Todoko-Ranu Complex, Sahu District, West Halmahera, North Maluku, Indonesia,” Journal of Geoscience, Engineering, Environment, and Technology, vol. 9, no. 3, pp. 341–348, Sep. 2024, doi: 10.25299/jgeet.2024.9.3.15295.

A. G. Macdonald, Volcanoes. New Jersey.: Prentice-Hall, 1972.

M. H. Dirk, “Petrologi - geokimia batuan Gunung Api Tampomas dan sekitarnya,” Indonesian Journal on Geoscience, vol. 3, no. 1, pp. 23–35, Mar. 2008, doi: 10.17014/ijog.3.1.23-35.

S. G. , & W. N. H. Fadlin, “Magmatisme Tholeitik pada Active Continental Margin (ACM) di Serayu bagian utara dan selatan, Banyumas, Jawa Tengah,” Jurnal Geologi dan Sumber Daya Mineral, vol. 19, no. 1, pp. 15–30, 2018.

J. B. Gill, Orogenic Andesites and Plate Tectonics. Springer-Verlag., 1981.

W. B. Hamilton, “Tectonics of the Indonesian Region (USGS Professional Paper No. 1078),” 1979.

I. Ipranta and R. Irzon, “Plagioclase Fractionation On The Holocene Volcanic Rocks Evolution In West Halmahera Regency,” Jurnal Geologi dan Sumberdaya Mineral, vol. 20, no. 3, p. 165, Aug. 2019, doi: 10.33332/jgsm.geologi.v20i3.468.

A. R. , A. M. , & Sutarto. Mendy, “Analisa unsur utama dan unsur jejak dalam identifikasi petrogenesis pada batuan beku Gunung Galunggung, Jawa Barat,” in Seminar Nasional Kebumian, Yogyakarta, 2018.

http://dx.doi.org/10.28989/angkasa.v17i1.2637

Article Metrics

Abstract view: 49 times
Download     : 23   times Download     : 6   times

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

Refbacks

  • There are currently no refbacks.