The Hydrothermal Breccias Characteristics of The Tumpangpitu Porphyry Cu-Au-High Sulphidation Epithermal Au Prospect, Banyuwangi, East Java, Indonesia
DOI:
https://doi.org/10.31098/ess.v1i1.177Keywords:
Hydrothermal Breccias, Alteration-Mineralization, Porphyry, H.S. Epithermal AuAbstract
The research area is administratively located in the Tumpang Pitu Pit Site, Sumberagung Village, Pesanggaran District, Banyuwangi Regency, East Java Province which is included in the coordinate system of the Universal Transfer Mercator (UTM) WGS 84 zone 50S. Compared with phreatomagmatic activity, which is caused by interaction / direct contact between the body of magma and water, phreatic activity releases less energy, and consequently smaller phreatic breccia dimensions. Phreatic breccia or hydrothermal breccias are quite often misinterpreted as phreatomagmatic structures. Hydrothermal breccias are formed in the hydrothermal system, generally at a depth of 200-300 m, and rarely at a depth of 500-1000 m. Based on geological structure analysis, it can be seen on the structure pattern map in the Tumpang Pitu area, there are 2 major faults in the Northwest - Southeast direction. These 2 major faults are the main controller for the formation of minor faults in the Tumpang Pitu area. There is a structural pattern that develops between these 2 major faults, which is a "metallogentically fertile structure" fault or in this pattern mineralization occurs. Based on field observations, core drilling, ASD analysis, and petrographic analysis, the type of alteration based on the mineral assemblage is divided into five, they are quartz, quartz-alunite, quartz kaolinite, kaolinite-montmorillonite-chlorite, and kaolinite-montmorillonite alteration. Mineralization rocks in the study area are volcanic and volcanic clastic rocks and occur as vuggy replacements and stockworks, disseminated, fractures, and veins. Hydrothermal breccias in the Tumpang Pitu area are characterized by enrichment zones of the hydrothermal system with an abundance of sulfides (Goetite, Hematite and Limonite), with Jigsaw and Crackle breccia textures, the mass in the form of sulfide minerals Goetite, Limonite, Hematite, 50-90% silica content and weak to strong vuggy texture. Veins and veinlet that develop are Sugary quartz - sulphide veins (chalcopyrite, bornite) (A Type), sulphide-center line crystalline veins (B Type), pyrite + quartz-chalcopyrite veins (D Type), early biotite (EB Type), High sulfidation epithermal veins (pyrite- bornite-chalcocite-covellite-tetrahedrite-tennatite-enargite) (HSE type), and Magnetite veins (M Type). Assuming homogenisation temperature is identical to formation temperature, the Tumpang Pitu epithermal gold deposit HS is formed at the intermediate temperature 270?C and 310?C. The average melting temperature is -0.3?C and -0.7?C which correspond to the salinity of hydrothermal fluid of 0.5 to 2% by weight equivalent to NaCl. Paleo depths from shallow and deep samples taken were around 650m and 1220mReferences
Abdissalam, R., Bronto, S., Harijoko, A., and Hendratno, A., 2009. Identifikasi Gunung Api Purba Karangtengah di Pegunungan Selatan, Wonogiri, Jawa Tengah, Jurnal Geologi Indonesia, Vol. 4 No. 4 Desember 2009: 253-267.
Achdan, A. and Bahri, 1993. Geological map of the Blambangan Quadrangle, East Java. Geological Research and Developmen Centre, Bandung.
Bemmelen, van, R.W, 1949, The Geology of Indonesia, Vol. IA, Gov. Print. Office, The Hague Martinus Nijhoff
Bronto, S., Mulyaningsing, S., Hartono, G., and Astuti, B., 2008. Gunung Api Purba Watuadeg: Sumber Erupsi dan Posisi Stratigrafi, Jurnal Geologi Indonesia, Vol. 3 No. 3 September 2008: 117-128.
Carlile, J.C. dan Mitchell, A.H.G., 1994. Magmatic Arcs and associated gold and copper mineralisation in Indonesia, Journal of Geochemical Exploration, Elsevier Science, Amsterdam, 50: 92-142.
Clarke, 1992, Granitoid Rock. Hall, A., 1987, Igneous Petrology, Longman Scientific & Technical, New York Harland, W. B. dkk, A Geologic Time Scale, Cambridge University Press, New York.
Gafoer, S. and Samodra, H.,1993. Geological Map of Indonesia, Jakarta Sheet, Scale 1:1.000.000, Geological Research and Development Centre, Bandung.
Hamilton,W.B.1979, Tectonics of the Indonesian Region. Professional Paper 1078,U.S. Geolology Survey, Washington, DC.,345 p.
Hartono, G. And Bronto, S., 2007. Asal-usul Pembentukan Gunung Batur di Daerah Wediombo, Gunungkidul, Yogyakarta, Jurnal Geologi Indonesia, Vol. 2 No. 3 September 2007: 143-158. Hellman,P.L., 2010. Tujuh Bukit Project Report on Mineral Resources, Located in East Java,
Indonesia. Technical Report for Interprid Mines Limited.
http://media.wotnews.com.au/esxann/01120850.pdf
Setijadji, L.D., Kajino, S., Imai, A., and Watanabe, K. ,2006. Cenozoic Island Arc Magmatism in
Java Island (Sunda Arc, Indonesia): Clues on Relationships between Geodinamics of Volcanic
Centers and Ore Mineralisation. Resources Geology, vol.56,no.3,267-292.
Paripurno, E.T. and Sutarto., 1996, Studi Petrokimia Magmatisme Tersier Daerah Merubetiri, Jawa Timur, Prosiding pertemuan Ilmiah Tahunan XXV Ikatan Ahli Geologi Indonesia,
Bandung.
Ratman, N., Suwarti, T., and Samodra, H., 1998. Geological Map of Indonesia, Surabaya Sheet,
Second Edition, Scale 1:1.000.000, Geological Research and Development Centre of Indonesia. Setijadji, L.D., Kajino, S., Imai, A., and Watanabe, K., 2006. Cenozoic Island Arc Magmatism in Java Island (Sunda Arc, Indonesia): Clues on Relationships Between Geodinamics of Volcanic
Centers and Ore Mineralisation. Resources Geology, vol.56,no.3,267-292.
Setijadji, L.D., and Maryono, A., 2012. Geology and Arc Magmatism of the Eastern Sunda Arc, Indonesia, Proceeding of Banda and Eastern Sunda Arcs 2012 MGEI Annual Convention, 26-
November 2012, Malang, East Java, Indonesia, p.1-22.
Sapei T., Suganda, A.H., Astadiredja,K.A.S., and Suharsono, 1992, Geological map of the Jember
Quadrangle, East Java. Geological Research and Developmen Centre, Bandung. Soeria-Atmadja, R., Maury,R.C., Bellon,H., Pringgoprawiro,H., Polvé,M., and Priadi,B., 1991, The Teriary Magmatic Belt in Java, The Procceding of the Silver Jubbiles Symposium On the
Dynamics of Subduction and Its Products,Yogyakarta: 98-121.
Soeria-Atmadja, R. Maury,R.C., Bellon,H., Pringgoprawiro,H., Polvé,M., and Priadi,B.,, 1993,
Tertiary Magmatic Belt in Java, Journal of Southeast Asian Earth Science. 9, 13-27 Sukmandaru Prihatmoko1, Sumardiman Digdowirogo2 , dan Damar Kusumanto, 2005, Potensi Cebakan Mineral di Jawa Tengah dan Daerah Istimewa Yogyakarta. Prosiding Seminar Geologi Jawa Tengah dan Daerah Istimewa Yogyakarta, Ikatan Ahli Geologi Indonesia Pengda
Yogyakarta.
Sutanto dkk, 1994, Geochronology of Tertiary Volcanism in Java, Prosiding Seminar Geologi dan
Geotektonik Pulau Jawa Sejak Akhir Mesosoik Hingga Kuarter, Jurusan Teknik Geologi,
Universitas Gajahmada, Yogyakarta.
Sutarto, Sutanto, and Salatun Said, 2002 Mineralisasi logam pada busur magmatik Jawa, Buletin
Wimaya, UPN Pres Yogyakarta.
Sutarto, Idrus, A., Harijoko, A., Setijadji, L.,D., and Meyer, F.M. 2015. Veins and Hydrothermal
Breccias of The Randu Kuning Porphyry Cu-Au and Epithermal Au Deposits at Selogiri Area,
Central Java, Indonesia. J.SE Asian App.Geol, 2015, Vol 7(2) pp. 80-99 ISSN 2086-5104. Wilson, M., 1989, Igneous Petrogenesis, A Global Tectonic Approach, Unwin Hyman, London Sillitoe, R.H., 1994., Indonesian mineral deposits – intruductory comments, comparisons and
speculations., Journal of Geochemical Exploration, vol. 50., pp 1-11.
Downloads
Published
Issue
Section
License
Copyright Notice
1. Author and Manuscript
- The author whose name appear in the above statement is declaring that he/she is the author of the stated manuscript
- All of the authors, if any, has already aware of this agreement and give consent for the mentioned name to act on their behalf
2. Validity
- The author stated that the manuscript is original and has never been published elsewhere.
- The author has obtained permissions from other contributors, if any
- The author has specifically mentioned and cited all external materials properly
- Note: External materials refers to any material, writings, figures, tables, illustrations, or any other materials which is not being produced, made, or patented by the author
- The author holds the sole responsible should there are any mistyping; unclear citation and holds responsible should there are any inappropriate manners such as unlawful, breaches, obscene, or any other reasons which are not aligned with the law and norm.
3. Deliverable of Manuscript and Other Materials
- The Contributor/Author shall deliver their manuscript using the provided and acceptable format (doc. Or docx) in the assigned date as well as author copyright document signed.
- Inability delivering the manuscript in the stated date and format will affecting the publication process thus, The Publisher have the rights to reject the manuscript and terminate the letter of acceptance or letter of offerings
- Author is responsible to deliver the manuscript using the provided format. Note: All of the figures, tables, illustrations, or any other materials that will be inserted in the manuscript need to be in high quality
- Should the author decided to alter the manuscript format, the fee will be charged and bore by authors
The Author give “Yayasan Sinergi Riset dan Edukasi” (here forth known as RSF Press) the unlimited right to publish the contribution identified above, without any restraints, in any form, at any time, directly or through others, to reproduce, transmit, archive, lease/lend, sell and distribute the contribution or parts thereof individually or together with other works in any language, revision and version (digital and hard), including reprints, translations, photographic reproductions, microform, audiograms, videograms, electronic form (offline, online), or any other reproductions of similar nature, including publication in the aforementioned book or any other book, as well as, the usage for advertising purposes. RSF Press will ensure that the Author’s name(s) is/are always clearly associated with the manuscript, and the publishers will not make any substantial change to the manuscript without consulting the author and ask for their consent. RSF Press is also entitled to carry out editorial changes in the contribution with the sole purpose of enhancing the overall organization and form of the contribution.
The Author retains the rights to publish the contribution in his/her own web site and thesis, in his/her employer’s web site and to publish a similar or revised version elsewhere, as long as it is clearly stated that the contribution was presented first RSF Press and the corresponding DOI is associated with the contribution.
