Arifudin Idrus(1*), Fahmi Hakim(2), I Wayan Warmada(3), Mochammad Aziz(4), Jochen Kolb(5), Franz Michael Meyer(6)

(1) Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
(2) Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
(3) Geological Engineering Department, Faculty of Engineering, Gadjah Mada University
(4) Department of Geological Engineering, Jenderal Soedirman University
(5) Geological Survey of Denmark & Greenland
(6) RWTH Aachen University, Germany
(*) Corresponding Author


Low suphidation (LS) epithermal gold deposits were recently found in the Paningkaban area, Central Java province, Indonesia, with more than five hundred artisanal gold miners currently operating in the area. This study is aimed to understand the geological factors controlling the gold mineralization and to characterize the alteration and ore mineralogy of the deposit. Several epithermal veins/veinlets trending N–S, NW–SE, and NE–SW are hosted by Tertiary turbiditic volcanoclastic sedimentary rocks of the Halang formation. This formation is composed of looping gradation of sandstone and siltstone units. Pre- and syn-mineralization structures such as extension joints, normal sinitral fault and sinitral fault control the gold mineralization. Fault movements formed dilational jogs manifested by NW-SE-trending en-echelon tension gash veins. Four main alteration zones are identified: (a) phyllic, (b) argillic, (c) sub propylitic and (d) weak subpropylitic. Ore minerals consist of native gold, electrum, native silver, pyrite, chalcopyrite, sphalerite, galena, arsenopyrite, cubanite, marcasite, covellite and tennantite, which are commonly associated withargillic alteration. Vein structures such as massive, swarm and low angle veins, stockwork and veins dispersed in diatreme breccia are present. Normal banded, cockade, crustiform, bladed carbonates as well as, comb and saccharoidal features are the typical vein textures. It is noteworthy that the veins are basically composed of carbonate with minor quartz at gold grades of up to 83 g/t Au. Based on the vein structures and textures, four stages of ore mineralization were developed consisting of (a) early stage (fluidized breccia and quartz vein), (b) middle stage (carbonate base metal), (c) late stage (late carbonate), and supergene stage. Gold mineralization originated mainly during middle and late stages, particularly in association with cockade, crustiform, bladed carbonate base metal veins. Based on those various features, the LS epithermal deposit in the study area is categorized as carbonate-base metalgold mineralization type.


Geology, Ore mineralization, Hydrothermal alteration, LS epithermal, Paningkaban area, Indonesia.

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Carlile, J.C. and Mitchell, A.H.G (1994) Magmatic arcs and associated gold and copper mineralisation in Indonesia: in van Leeuwen, T.M., Hedenquist, J.W., James, L.P., and Dow, J.A.S., eds., Mineral Deposits of Indonesia, Discoveries of the Past 25 Years: Journal of Geochemical Exploration, v. 50, pp. 91-142. Corbett, G.J. (2004) Epithermal and porphyry gold – geological models. Proceedings PACRIM Congress 2004, Adelaide. pp. 15-23. Djuri, M., Samodra, H., Amin T.C. and Gafoer, S. (1996) Geological Map Sheet of Purwokerto-Tegal, scale 1:100.000. Centreof Geological Research and Development, Bandung. Garwin, S.L. (2000) The setting, geometry and timing of intrusion-related hydrothermal systems in the vicinity of the Batu Hijau porphyry copper-gold deposit, Sumbawa, Indonesia: Unpublished Ph.D. Thesis, University of Western Australia, Perth, 320 p. Idrus, A., Pulungan, B.A.A. and Titisari, A.D. (2007) Geology, hydrothermal alteration and mineralization of the Kapur-Natas epithermal low sulphidation, South Tapanuli district, North Sumatra – Indonesia, Prosiding PIT IAGI, Bali, November 2007, pp. 1 – 11. Idrus, A., Prihatmoko, S., Hartono, H.G., Fadlin, Ernowo, Franklin, Moetamar and Setiawan, I. (2014) Some key features and possible origin of the metamorphic rockhosted gold mineralization in Buru island, Indonesia, Indonesian Journal on Geoscience, 1: 9-19. Imai, A., Shinomiya, J., Soe, M.T., Setijadji, L.D., Watanabe, K., Yoshikawa, R. and Warmada, IW. (2007) Porphyry-type mineralization at Selogiri area, Wonogiri regency, Central Java, Indonesia. Resource Geology 57: 130-140. Querubin, C.D., and Walters, S. (2011) Geology and Mineralization of Awak Mas: A Sedimentary Hosted Gold Deposit, South Sulawesi, Indonesia, Proceedings of The Sulawesi Mineral Seminar, Manado 28-29 November 2011, pp. 211-229. Warmada, IW. (2003) Ore mineralogy and geochemistry of the Pongkor epithermal goldsilver deposit, Indonesia, Dissertation. Papierflieger, Clausthal-Zellerfeld, 107 p.


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