The Distribution of Element and Minerals in an Illite-Sericite-Secondary Biotite Altered Rock at Sumbersari Region

  • Afri Tri Kristanto ITNY


The Kulonprogo Mountains as part of the magmatism path of the southern mountains which have mineral potential with small to large economic value. Epithermal mineralization has previously been found in the Kokap, Gunung Gupit – Menoreh, and Bagelen – Gunung Agung areas. This study identifies mineralization in the central-proximal facies of the Purba Ijo Volcano in Sumbersari, Kaligesing, Purworejo by looking at the geological conditions and distribution patterns of minerals in alteration rocks to provide data and information on geological phenomena in the study area. The research was conducted using literature study, data collection and observation, laboratory work, as well as interpretation and research evaluation. The geological condition of the study area is in the central – proximal facies of Khuluk Gajah which consists of andesite lava intruded by microdiorite, quartz microdiorite, diorite, andesite, basaltic andesite, and covered with Jonggrangan limestone. Many intrusions are supported by structures that develop around the microdiorite intrusion. Mineralization develops associated with porphyry type I guess with stockwork and sheeted vein textures, with vein types A, AB, and D. The final phase of alteration is sericite, illite, kaolinite, and pyrite dissemination which shows overprint by the epithermal system. In the LP2B sample XRD analysis shows an epithermal process that enters the porphyry body. XRF micro-analysis showed a diffuse pattern of altered minerals with a predominance of Si and heavy minerals and relatively clustered sulfides with a predominance of Fe and Cu. The relatively dominant S and Si elements in each vein are interpreted as being carried by the fluid that forms the vein.


[1] Rahardjo, W., Sukandarrumidi dan Rosidi, H. Yogyakarta Sheet Geological Map scale 1:100.000. Bandung: Geological Research and Development Center. 1995
[2] Maryono A, Setijadji LD, Arif J, Harrison R, Soeriaatmadja E. Gold, Silver and Copper Metallogeny of the Eastern Sunda Magmatic Arc Indonesia. In Proceeding of Banda and Eastern Sunda Arcs 2012 MGEI Annual Convention. 2012 Nov (hal. 26-27).
[3] Harjanto, A. Petrologi dan Geokimia Batuan Volkanik di Daerah Kulonprogo dan sekitarnya Daerah Istimewa Yogyakarta, Jurnal Ilmiah MTG, 4(1). 2011
[4] Bronto S. Geologi Gunung Api Purba. Badan Geologi; 2013
[5] Pramumijoyo P, Idrus A, Warmada IW, Yonezu K. Geology, Geochemistry and Hydrothermal Fluid Characteristics of Low Sulfidation Epithermal Deposit in the Sangon Area, Kokap, Special Region of Yogyakarta. Journal of Applied Geology. 2017;2(1): hal. 48-58.
[6] Pambudi D, Winarno T, Aribowo Y. Geologi dan Mineralisasi Logam Daerah Sangon, Kokap, Kulon Progo, Daerah Istimewa Yogyakarta. Jurnal Geosains dan Teknologi. 2018 Jul 31;1(2): hal. 74-80.
[7] Idrus A, Warmada IW, Putri RI. Mineralisasi Emas di Gunung Gupit, Magelang, Jawa Tengah: Sebuah Penemuan Baru Prospek Emas Tipe Epitermal Sulfida Tinggi Pada Rangkaian Pegunungan Kulon Progo-Menoreh. In Annual Engineering Seminar 2013, Proceeding, FT-UGM, Yogyakarta 2013.
[8] Ansori C, Hastria D. Studi Alterasi dan Mineralisasi disekitar gunung Agung, Kabupaten Kulonprogo–Purworejo. Buletin Sumber Daya Geologi. 2013 Aug 8;8(2): hal. 75-86.
[9] Prasetyo LA, Fadlin S, Anggoro WT, Oktaviany A. Pre-Eliminary Study High Sulphidation Epithermal Gold And Possibility Porphyry System In The Southern Part Of Kulon Progo Dome-Hargerejo-Bagelen-Purworejo. JCM HAGI-IAGI-IAFMI-IATMI; 2017.
[10] Verdiansyah, O. Tinjauan Awal Potensi Mineralisasi Daerah Kulon Progo, Yogyakarta. 2018
[11] Setijadji LD, Kajino S, Imai A, Watanabe K. Cenozoic island arc magmatism in Java Island (Sunda Arc, Indonesia): Clues on relationships between geodynamics of volcanic centers and ore mineralization. Resource Geology. 2006 Sep;56(3):267-92.
[12] Setijadji LD, Maryono A. Geology and arc magmatism of the eastern Sunda arc, Indonesia. InProceeding of Banda and Eastern Sunda Arcs 2012 MGEI Annual Convention 2012 Nov (pp. 26-27).
[13] Harjanto A. Vulkanostratigrafi Di Daerah Kulon Progo Dan Sekitarnya, Daerah Istimewa Yogyakarta. MTG. 2014 Jul 17;4(2).
[14] Hartono, H. G. Peran Paleovolkanisme Dalam Tataan Produk Batuan Gunung Api Tersier di Gunung Gajahmungkur, Wonogiri, Jawa Tengah. University Padjadjaran. 2010
[15] Barianto DH, Kuncoro P, Watanabe K. The use of foraminifera fossils for reconstructing the Yogyakarta graben, Yogyakarta, Indonesia. Journal of South East Asian Applied Geology. 2010 May;2(2):138-43.
[16] Syafri I, Budiadi E, Sudradjat A. Geotectonic Configuration of Kulon Progo Area, Yogyakarta. Indonesian Journal on Geoscience. 2013 Dec 28;8(4):185-90.
[17] Soeria-Atmadja R, Maury RC, Bellon H, Pringgoprawiro H, Polve M, Priadi B. Tertiary magmatic belts in Java. Journal of southeast asian earth sciences. 1994 Jan 1;9(1-2):13-27.
How to Cite
Afri Tri Kristanto (2021) “The Distribution of Element and Minerals in an Illite-Sericite-Secondary Biotite Altered Rock at Sumbersari Region ”, ReTII, pp. 490 - 500. Available at: // (Accessed: 15June2024).