International Journal of Engineering and Science Applications ISSN: 2406-9833 @2016 PPs-UNHAS IJEScA vol. 3, 1, May 2016 39 IJEScA Type of Gold Hydrothermal Deposits on Metamorphic Rock District Buru, Province Maluku M. Kh. Noor 1 , A. Tonggiroh 2 , A. Maulana 2 1 Mining Engineering, Veteran Republic of Indonesia University 2 Geology Department, Engineering Faculty, Hasanuddin University ipung.noor@yahoo.com ABSTRACT An investigation on gold occurrence in Buru island is needed to determine type of deposit in the area. This study aims to analyse mineralisation, alteration and metamorphic facies of metamorphic-hosted gold deposit in Buru area by using petrographic method, x-ray flourescense, x-ray diffraction, and polish section. The results reveral that there are two types of metamorphic rocks: schists and phyllite. Greenschist facies are charecterized by muscovite mineral, quartz, chlorite, biotite, clay mineral, and codierite. Phyllite is in the same genetic condition with schist (medium metamorphism), with formation temperature ranges from 300°C to 450°C with a pressure around 1-8 Kbar through a regional metamorphism process. Alteration in quartz veins indicated the nature of proximal zone to ore zone. Silicic alteration (quartz) is also found intensely, and it is generally associated by propylitic alteration (chlorite) and sericitic (muscovite). Mineralisation follows the direction of the distribution of quartz veins with crustiform banding texture. The quartz vein thickness is from 40 cm to 50 cm. The alteration and mineralisation occurrence of the studied area suggests epithermal gold deposits type. Keywords: Buru island, metamorphic rocks, gold deposit, epithermal. Article history: Received 10 May 2016, last received in revised 20 May 2016. 1. INTRODUCTION Buru Island is characterized by the occurrence of terrane consists of low grade metamorphics of greenschist facies to medium grade metamorphics of amphibolite facies. Their ages are Paleozoic and consist of micaschist, phyllite, slate, metasandstone and marble. Their composition seems to reflect an origin as flysch type sediments (Fig 1.). Further, the terrane consists of flysch type Triassic sediments (Dalan Formation) and dolomite reef limestones (Ghegan Formation). The terrane is overlain by Jurassic-Eocene deep-sea deposits consisting of calcilutite, shale and marl and Oligocene-Pliocene shallow-sea deposits. At the base, conglomerate and basic pillow lava are found [1]. It has been reported that the metamorphic terrane hosted some gold mineralization [2, 3, 4] indicated by segmented, sigmoidal and discontinuous quartz veins which in line to foliation of metamorphic host rock, especially mica schist. The quartz veins with gold generally show colloform banded,