Characteristics and Physicochemical Conditions of the Formation of the Epithermal Base Metal (Pb-Zn)Quartz Veins at Tirtomoyo Area, Southern Mountain, Java Island, Indonesia

• Main Author: , A. Idrus
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Departemnts of Geological Engineering Faculty of E 2009
• Online Access: https://repository.ugm.ac.id/95193/; http://repository.ugm.ac.id/digitasi/index.php?module=cari_hasil_full&idbuku=3011
• Institution: Universitas Gadjah Mada

<p>Phenomena of hydrothermal activity are frequently observed in the studied area (Tirtomoyo), which is obviously manifested by the presence of hydrothermal alteration and ore mineral deposits, for instance, base metals (Pb- Zn)+quartz veins. This paper is aimed to study the characterization of the ore mineralization and to elucidate the physico-chemical conditions (T, P, salinity and depth) of the formation of the deposit. This study was done in two main stages, mainly fieldworks and laboratory analyses consisting of petrology, mineragraphy, AAS (Atomic Absorption Spectrometry) and microthermometry fluid inclusion. The base metals (Pb-Zn) veins are characterized by quartz, pyrite, galena, sphalerite and rare chalcopyrite. Chemical compositions of veins are various, for instance, Bonagung vein (0.13 % Cu