Characteristics of Textures and Zonation of Epithermal Vein in Cihonje Area, Gumelar Sub District, Banyumas Regency, Central Java']Java

The Cihonje epithermal mineralization system has been identified by the existence of vien deposits. Epithermal vein deposits formed by cavity filling of hydrothermal solution. The epithermal vein deposit characteristics need to be identified to localize the precious metal and base metal deposits. This research aims to understand the characteristic of vein deposit in the research area. The method used are slab vein analysis, petrography, mineragraphy, and Atomic Absorption Spectrophotometry (AAS). The vein textures are divided into four groups: Lattice Bladed, Cockade, Saccharoidal, and Sulfide Banded Disseminated Sulfide. Vein textures that contain precious metal (gold, silver) is located in the Superzona Crustiform - Colloform (CC). Veins that contain base metal is located in the superzona Crystalline quartz. The mineragraphy analysis showed the vein deposits are associated with Pyrite, Chalcopyrite, Arsenopirite, Sphalerit, Galena, Gold, and Silver. The AAS analysis showed that vein sample has 83 ppm Au content that indicates there is a zone of precious metal accumulation. In the research area.