CHARACTERISTICS STUDY OF COBALT (CO) IN NICKEL LATERITE DEPOSITS IN THE NORTH POMALAA, SOUTHEAST SULAWESI
Research on cobalt (Co) characteristics in laterite nickel deposits in the North Pomalaa area aims to identify the types of minerals associated with cobalt (Co) enrichment in the limonite zone, determine the type of cobalt (Co) deposits in ultramafic rocks of the dunite and harsburgite types and...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/84326 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Research on cobalt (Co) characteristics in laterite nickel deposits in the North
Pomalaa area aims to identify the types of minerals associated with cobalt (Co)
enrichment in the limonite zone, determine the type of cobalt (Co) deposits in
ultramafic rocks of the dunite and harsburgite types and determine cobalt (Co)
exploration targets. The analysis method in this study uses petrographic analysis
and X-Ray Diffraction (XRD) analysis, geochemical analysis uses the X-Ray
Fluorescence (XRF) analysis method, while the statistical analysis method uses
histograms and scatter diagrams. Based on the results of observations and data
processing taken in the North Pomalaa area, cobalt (Co) element enrichment is
related to several factors such as laterite zones, bedrock, mineral associations, and
geochemical associations.
Cobalt (Co) elements in the North Pomalaa area have a higher average content
value in the limonite zone compared to other zones, the average cobalt (Co) content
in the limonite zone with weakly serpentinized dunite bedrock is 0.108%, weakly
serpentinized harzburgite is 0.123%, and moderately serpentinized harzburgite is
0.122%. The average thickness in the limonite zone is 12 m in the moderately
serpentinized harzburgite bedrock.
In this study, it can be concluded that the enrichment of cobalt (Co) elements in the
North Pomalaa area is in the lower limonite zone at a depth of five to eight meters.
The mineral association related to cobalt (Co) enrichment is goethite minerals, so
it can be grouped as type two cobalt. Cobalt (Co) elements in the limonite zone are
strongly positively correlated with manganese (Mn), moderately positively
correlated with iron (Fe) and weakly positively correlated with chromium (Cr). |
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