GEOCHEMICAL CHARACTERIZATION OF EPITHERMAL HIGH SULPHIDATION GOLD DEPOSITS
Geochemical characterization is a key to predict the potential of acid mine drainage generation. Six rocks samples from epithermal high suphidation gold deposits and their leachate are used in this research. The objective of this research are to know the alteration type of each sample, geochemist...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/58307 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Geochemical characterization is a key to predict the potential of acid mine
drainage generation. Six rocks samples from epithermal high suphidation gold
deposits and their leachate are used in this research. The objective of this research
are to know the alteration type of each sample, geochemistry characteristics of
rocks samples, the oxidation rate of acid rock drainage, and the relation between
alteration type with the rock’s characteristics. The prediction according to several
tests, such as the rock’s minerals composition by XRD (X-Ray Diffraction), rock’s
elements composition by XRF (X-Ray Fluoroscence), static tests (pH paste, NAG
pH or net acid generating pH, and ABA or acid base accounting), kinetic tests with
FDCLT (free draining column leach test) method, leachate’s elements composition
by ICPMS (Inductively Coupled Plasma Mass Spectometry), and leachate’s ion
composition by IC (Ion Chromatography). Based on the data analysis, all the
samples are potentially generates acid drainage or called as PAF (potentially acid
forming) and there are 1 sample from silica massive alteration, 2 samples from
advanced argillic alteration, and 3 samples from argillic alteration. The data
analysis shows that PHREEQC models are reliable to count the oxidation rate. The
geochemistry characteristics are not related to the alteration types, it is more
related to the minerals composition in each alteration type. |
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