THE APPLICATION OF SPECTROMETRY ANALYTICAL SPECTRAL DEVICES (ASD) METHOD IN STUDY ALTERATION ZONE: CASE STUDY TOGURACI AND TOBOBO PROSPECT, NORTH HALMAHERA DISTRICT, NORTH MALUKU PROVINCE

• Main Author: KUSNIADI (NIM: 22106330), ARI
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19918
• Institution: Institut Teknologi Bandung

The aim of the application of spectrometry ASD method in study alteration zone are to identify alteration mineral assemblages and to determine alteration zone in study area. Alteration zones developed in Toguraci and Tobobo prospect are potassic, propillitic and argillic zone. Potassic zone comprises biotite - k-feldspar, propillitic zone consists chlorite - epidote - sericite, and argillic zone comprises quartz - sericite - smectite - kaolinite - illite. This alteration zone are typical <br /> <br /> <br /> alteration zones in porphyry system. Spectrometry ASD method is very usefull, fast, practically and real-time <br /> <br /> <br /> identifying clay minerals on the field due the portability of devices. Comparing with XRD and petrography method, ASD has a few limitation in order to identify minerals except clay minerals. According to the interpretation of alteration zone map in Toguraci area, <br /> <br /> <br /> the exploration work programme in is suggested due southeast which is extended of argillic alteration zone. The future exploration programme for Tobobo area is <br /> <br /> <br /> suggested due north - east which is the extention of argillic zone. This recomendation should be acompanied by another exploration methods in order increasing the geologic confidence and minimizing the risk.