Petrology and Geochemical Comparation of Pumice and Scoria Rocks of Slamet Volcano, Central Java

Yogi Adi Prasetya, Atsushi Toramaru


Slamet Volcano is one of Indonesia Quaternary Stratovolcanoes in Central Java Province. Slamet volcano is divided into two parts, Old Slamet in the western part and Young Slamet. The author examined a comparation data of pyroclastic rock of Slamet Volcano, the pyroclastic rocks are pumice from Old Slamet, the scoria fall, and scoria cones are from Young Slamet. They have different geochemical and petrology features, pumice rock has higher SiO2 from 60 to 64 wt.%, scoria fall has SiO2 49.81 to 50.56 wt. %, and scoria cone has SiO2 49.26 wt. %. Petrographic observation showed that pumice is vesicular and contains of phenocryst pyroxene, plagioclase and biotite, scoria fall, and scoria cones have similar petrographic characteristic they have phenocryst of plagioclase, olivine, and pyroxene with hyalopilitic texture. The contrast of major element combined with petrographic features suggest that pyroclastic rock in Slamet Volcano formed by different magma and the magma has differentiation process of Slamet magma is generally caused by magma mixing.

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M. G. Best, IGNEOUS AND METAMORPHIC PETROLOGY SECOND EDITION, Oxford: Blackwell Publishing company, 2003.

A. R. Philpotts dan J. J. Ague, Principles of Igneous and Metamorphic Petrolog, Second Edition, Cambridge University Press, 2009.

M. F. Gardner,, V. R. Troll, J. A. Gamble,, R. Gertisser, G. L. Hart, R. M. Ellam, C. Harris dan J. A. Wolff, “Crustal Differentiation Processes at Krakatau Volcano, Indonesia,” Journal of Petrology, Vol. %1 dari %2vol. 54,, no. no 1., pp. 149-182., 2013.

M. Abdurrachman, M. Yamamoto, E. Suparka, Y. Suyatno, Yuwono dan B. Sapiie, “Sr-Nd Isotopic Study of Papandayan Area, West Java: A Window into The Past Magmatism and Tectonic Event,” dalam Proceedings PIT IAGI, Yogyakarta, 2012.

Y. A. Sendjaja,, J. I. Kimura dan E. Sunardy, “Across-arc geochemical variation of Quatenary lavas in West Java, Indonesia: Mass-balance elucidation using arc basalt simulator model.,” Island Arc, vol. 18, pp. 201-224, 2009.

H. E. Wibowo, Petrological and Geochemical Study of Sundoro Volcano, Central Java, Indonesia: Temporal Variation in Differentiation and Source Processes in the Growth of an Individual Volcano, Hokkaido: PhD Thesis, Hokkaido University, 2017.

H. K. Handley, C. G. Macpherson, J. P. Davidson, K. Berlo dan D. Lowry, “Constraining Fluid and Sediment Contributions to Subduction-Related Magmatism in Indonesia: Ijen Volcanic Complex,” Journal of Petrology, Vol. %1 dari %2vol. 48,, no. no. 6., pp. 1155-1183, 2007.

O. Reubi, dan I. A. Nicholls, “Magmatic evolution at Batur volcanic field, Bali, Indonesia: petrological evidence for polybaric fractional crystallization and implication for caldera forming eruption,” Journal of Volcanology and Geothermal Research, pp. 345-369, 2004.

M. Nicole, C. M. Vidal dan a. et., “New Insights into Magma Differentiation and Storage in Holocene Crustal Reservoirs of theLesser Sunda Arc: the Rinjani–Samalas VolcanicComplex (Lombok, Indonesia),” Journal of Petrology, vol. Vol. 58, no. No. 11, p. 2257–2284, 2017.

J. P. Lockwood dan W. H. Richard, Volcano Global Perspective, Oxford: John Wiley & Sons Ltd, 2010.

“Global Volcanism Program,” NATIONAL MUSEUM OF NATURAL HISTORY, 2013. [Online]. Available: [Diakses 05 April 2022].

M. Djuri , H. Samodra, T. C. Amin dan S. Gafoer, “Peta Geologi Lembar Purwokerto - Tegal Skala 1:100.000,” Pusat Penelitian dan Pengembangan Geologi, Bandung, 1975.

D. Vukadinovic dan I. Sutawidjaja , “Geology, Mineralogy and Magma Evolution of Gunung Slamet Volcano,” Journal Southeast Asian Earth Science, vol. 11, no. 2, pp. 135 - 164, 1995.

H. K. Handley,, J. Blichert-Toft, R. Gertisser, C. G. Macpherson, S. P. Turner, A. Zaennudin dan M. Abdurrachman,, “Insight from Pb and O isotopes into along arc variation in subduction inputs and crustal assimilation for volcanic rocks in Java, Sunda arc, Indonesia.,” Geochimica et Cosmochimica Acta, pp. 205-226, 2014.

I. S. Sutawidjaja dan R. Sukhyar, “Cinder cones of Mount Slamet, Central Java, Indonesia,” Journal Geologi Indonesia, vol. Vol. 4, no. No 1, pp. 57-75., 2009.

D. J. Whitford, “Strontium isotopic studies of the volcanic rock of Sunda Arc. Indonesia, and their petrogenetic impiclations,” Geochima et Cosmochimica Acta 39., vol. 39, pp. 1278-1302, 1975.

D. Vukadinovic dan I. A. Nicholls, “The Petrogenesis of Island arc basalt from Gunung Slamet Volcano, Indonesia: Trace element and 87Sr/86Sr Constrain,” Geochimica et Chosmochimica, vol. 53, pp. 2349 - 2362, 1989.

A. Harijoko, R. M. P. P. Gunawan, H. E. Wibowo, N. E. Setiawan, E. Handini, W. Suryanto dan E. T. W. Mei, “Petrological and geochemical characteristics of pumiceous tephra deposit from Slamet stratovolcano, Central Java, Indonesia: Explosive period of the most differentiated magma of a basaltic stratovolcano,” dalam International Symposium on Earth Hazard and Disaster Mitigation (ISEDM), 2017.

A. Harijoko, R. M. P. P. Gunawan, H. E. Wibowo, N. E. Setiawan, E. Handini, W. Suryanto dan E. T. W. Mei, “Formation of Mount Loyang: Easternmost scoria cone of Slamet stratovolcano, Central Java, Indonesia,” dalam International Symposium on Earth Hazard and Disaster Mitigation (ISEDM), 2017.

R. W. Le Maitre, Igneous Rocks a Classification and Glossary of Terms 2nd Edition Recommendations of the International Union of Geological Science Subcommision on the systematics of igneous rocks., University Press Cambridge, 2002.

I A. Peccerillo dan S. Taylor, “Geochemistry of Eocene calc-alkaline volcanic rocks in Turkey,” Contrib. Mineral. Petrology, vol. 68, pp. 63-81, 1976..

I. S. Sutawidjaja, D. Aswin dan K. Sitorus, “Geology Map Of Slamet Volcano, Central Java,” Volcanology Survey of Indonesia, Bandung, 1985.

M. Renjith,, “Micro-textures in plagioclase from 1994-1995 eruption, Barren Island Volcano: Evidence of magma plumbing system in the Andaman subduction zone,” Geoscience Frontiers, pp. 113-126, 2012.

A. Tsuchiyama, “Dissolution kinetics of plagioclase in the melt of the system diopside-albite-anorthite, and origin of dusty plagioclase in andesite,” Contributions to Mineralogy and Petrology, vol. Vol. 89, pp. 1-16, 1985.

R. Gill, Igneous Rocks and Processes A Practical Guide, Oxford: Blackwell Publishing, 2010.



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