Magmatisme Tholeitik pada Active Continental Margin (ACM) di Serayu Bagian Utara dan Selatan â€“ Banyumas, Jawa Tengah
Abstract - The significant amount of basaltic lava with geological age from Eocene to Miocene is found in Serayu Physiographic, Central Java. The basaltic lava has become a very interesting to observe due to its geological phenomenon and characteristics of the basaltic lava found in various tectonic positions. The objective of this research is to obtain the geological data in the form of petrological data and geochemical data from Ponjen (northern Serayu) and Kalisoka (southern Serayu) that spreading in the physiographic. The survey aimed to deduce the petrogenesis of basalt lava in the research area. The research method is using petrographic analysis and geochemical analysis by X-Ray Fluorescence (XRF), and Inductive Couple Plasma Mass Emission Spectrometry (ICP-MS). The data processing results of basalt lava by using geochemical major oxides for both zones indicating the tholeiitic origin magma and the type of plagioclase in form of labradorite. The magmatism of Ponjen-Kalisoka was formed from the tectonic setting of Active Continental Margin (ACM) with significant anomaly characteristic of Ta (Tantalum; Ta = 0,70 - 1,98 ppm) compares with basalt Gede volcanic (West Java; Ta = 0, 26 - 0.40 ppm) which is calc-alkaline which are both formed from ACM. The tholeiitic basalt of Ponjen-Kalisoka is proposed has contaminated with mantle magma which is possibly in form of intracontinental rifting resulted in Ponjen-Kalisoka's trace element becoming more into the transitional tholeiitic/calc-alkaline. The magmatism of Ponjen-Kalisoka's volcanic is a transitional magmatism (back arc volcanism) from southern volcanism (tholeiitic series) toward a calc-alkaline at northern part volcanism, such as the potassic calc-alkaline of Ungaran volcanic.
Keyword: Serayu physiographic, Active Continental Margin (ACM), tholeiitic / transitional tholeiitic / calc-alkaline, magma contamination
Abdel-Rahman, A. F-M., 2002. Mesozoic volcanism in the Middle East: Geochemical isotopic and petrogenetic evolution of extension-related alkali basalts from central Lebanon. Geological Magazine Vol 139 issue 6, 621-640.
Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C., 1995 (reprinted 2003). Handbook of Mineralogy, Volume II (Silica, Silicates). Mineralogical society of America.
Anthony R., Philpotts, and Ague, J.J., 1989. (2nd edition): Principles of Petrography of Igneous and Metamorphic Rocks. Cambridge University Press
Arth, J.G., 1976. Behaviour of trace elements during magmatic process summary of theoretical models and their applicationsâ€, Revised Geophysical Space Physics, vol. 15, pp. 96-104.
Asikin S., Handoyo A., Prastistho B., dan Gafoer S., 1992. Peta Geologi Lembar Banyumas, Jawa Tengah, skala 1:100.000. Bandung. Pusat Penelitian dan Pengembangan Geologi.
Bellon, H., Muary, R.C., Soeria-Atmadja, R., Polve, M., Pringgoprawiro, H., Priadi, B., 1989. Chronologie 40K â€“ 40Ar du volcanisme tertiaire de Java Central (IndonÃ©sie) : mise en Ã©vidence de deux Ã©pisodes distincts de magmatisme d'arc. C. R. Acad. Sci. Paris, t.309, Serie II, 1971-1977.
Cross, W., Iddings, J.P., Pirrson, L.V., and Washington, H.S., 1902. A Quantitative Chemico-Mineralogical Classification and Nomenclature of Igneous Rocks, Journal of Geology, V. 10, P.555-690
Debon, F. and Le Fort, P., 1983. A chemical-mineralogical classification of common plutonic rocks and associations. Transactions of Royal Society of Edinburgh, Earth Sciences 73, 135-149.
Deer, W.A., Howie, R.A., Zussman, J., 1963 (1st ed), 2001 (2nd ed). Rock-Forming Minerals : Framework Silicates (Feldspars), Volume 4A. Published by The Geological Society. p.46 (Ternary solid solution An-Ab-Or)
Dempsey, S. R., 2013. Geochemistry of volcanic rocks from the Sunda Arc (Durham E-Theses : Thesis for the degree of Doctor of Philosophy), Data for Galunggung Volcanic, 240.
Djuri, M., Samodra, H., Amin, T.C. dan Gafoer, S., 1996. Peta Geologi lembar Purwokerto dan Tegal, Jawa Tengah, Skala 1:100.000. Bandung. Pusat Penelitian dan Pengembangan Geologi.
Godang, S., Fadlin, Priadi, B., 2016. Geochemical Signatures of Potassic to Sodic Adang Volcanics, Western Sulawesi: Implications for Their Tectonic Setting and Origin. Indonesian Journal on Geoscience Vol. 3 No. 3.
Handley, H.K., 2006. Geochemical and Sr-Nd-Hf-O isotopic constraints on volcanic petrogenesis at the Sunda arc, Indonesia (Durham E-Theses : Thesis for the degree of Doctor of Philosophy; Data for basalt of Gede Volcanic Complex (Jawa Barat), in p.220),
Hartono, G., Sudrajat, A., Syafri, I., 2008. Gumuk gunung api purba bawah laut di Tawangsari - Jomboran, Sukoharjo - Wonogiri, Jawa Tengah. Jurnal Geologi Indonesia, Vol. 3 No. 1.
Hollocher, K., Robinson, P., Walsh, E., and Roberts, D., 2012. Geochemistry of amphibolite-facies volcanics and gabbros of the StÃ¸ren Nappe in extensions west and southwest of Trondheim, Western Gneiss Region, Norway: a key to correlations and paleotectonic settings. American Journal of Science, 312
Irvine, T.N., and Baragar W.R.A., 1971. A Guide to the chemical classification of the common volcanic rocks, Canadian Journal of Earth Sciences. 8,523-548
Lallemand, S., 2014. Active Continental Margin. Encyclopedia of marine geoscience. DOI 10.1007/978-94-007-6644-0_102-2. Springer science
Le Bas, M.J., Le Maitre R.W., Streckeisen, A., Zanettin, B., 1986. A Chemical classification of volcanic rocks based on the total alkali-silica diagram. Journal of Petrology,Vol 27, 745â€“750.
Mc Donough, W.F., and Sun, S.S., 1995. The composition of the Earth. Chemical Geology 120, 223-253
MacLean, W.H., and Barrett, T.J., 1993. Lithogeochemical technique using immobile elements. Journal of Geochemical Exploration 48(2), p.109-133.
Peccerillo, A., and Taylor, S.R., 1976. Geochemistry of the Eocene calc-alkaline volcanic rocks from the Kastamonu area, northern Turkey.Contributions to Mineralogy and Petrology. 58, p.63-81.
Pearce, J.A., 1983. Role of the sub-continental lithosphere in magma genesis at active continental margins. In: Hawkesworth, C.J., Norry, M.J. (Eds.), Continental Basalts and Mantle Xenoliths. Shiva, UK, pp. 230â€“ 249.
Pearce, J. A., 2008. Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust. Lithos 100, 14â€“48.
Salters, V.J.M., and Stracke, A., 2004. Composition of the depleted mantle. G3 (Geochemistry, Geophysics, Geosystems) Vol. 5, No 5.
Soeria-atmadja, R., Maury, R.C., Bellon, H., Pringgoprawiro, H., Polve, M., Priadi, B., 1994. Tertiary magmatic belt in Java. Journal of Southeast Asian earth science, vol 9. Great britain. Pergamon press.
Sun, S.Q., Zhang, C.J., Huang, R.Q., 2006. The Tectonic Settings Discrimination of the Basalts in the Convergent Margin of Plate by Th, Nb and Zr. Advances in Earth Science,Vol 21, No.6, 593-598.
Van Bemmelen, R.W., 1949. The Geology of Indonesia. vol. 1A. General Geology of Indonesia and adjacent Archipelagoes, 2nd ed. Martinus Nijhoff, The Haque.
Wang, Y.N., Zhang, C.J., Xiu, S.Z., 2001. Th/Hf-Ta/Hf identification of tectonic setting of basalts. Acta Petrol Sin (in Chinese), 17(3): 413-421.
Wheller, G.E., 1986. Petrogenesis of Batur Caldera, Bali, and the geochemistry of Sunda-Banda Arcs Basalts. (Thesis for the degree of Doctor of Philosophy, University of Tasmania)
Wilson, M., 1989. Igneous Petrogenesis â€“ A Global Tectonic approach, published by HarperCollins Academic, London, UK, 466 p
Wright, J.B., 1969. A simple alkalinity ratio and its application to questions of non-orogenic granite genesis. Geological Magazine 106(4): 370-384
Authors who publish articles inÂ Jurnal Geologi dan Sumberdaya Mineral (JGSM.Geologi) agree to the following terms:
- Authors retain copyright of the article and grant the journal right of first publication with the work simultaneously licensed under aÂ CC-BY-NC or The Creative Commons Attributionâ€“ShareAlike License.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access)