Research Article
Bombana Gold Hunt: Geomorphology, Geology & Land Use Changes
@INPROCEEDINGS{10.4108/eai.19-11-2022.2332159, author={Dipo Caesario and Musri Ma'waleda and Bigharta Bekti Susetyo and Muhammad Ikhwan Bagus}, title={Bombana Gold Hunt: Geomorphology, Geology \& Land Use Changes}, proceedings={Proceedings of the 2nd International Conference of Geography, ICGEO 2022, 19-20 November 2022, Padang, West Sumatera, Indonesia}, publisher={EAI}, proceedings_a={ICGEO}, year={2023}, month={6}, keywords={bombana facies of metamorphic rock illegitimate gold exploitation land use changes}, doi={10.4108/eai.19-11-2022.2332159} }- Dipo Caesario
Musri Ma'waleda
Bigharta Bekti Susetyo
Muhammad Ikhwan Bagus
Year: 2023
Bombana Gold Hunt: Geomorphology, Geology & Land Use Changes
ICGEO
EAI
DOI: 10.4108/eai.19-11-2022.2332159
Abstract
The research area is located at Poleang and Toburi village, Eastern Poleang District, Bombana Regency, Southeast Sulawesi Province. The Research area is part of the East Sulawesi Zone. Geomorphology of the research area consists of four units: Mountains Complex, Homoklin Hills, Karts Hills, and Alluvial Plain. Shape of the river valley in the study area is so complex, resembling the ``V" and "U" shape, with relatively straight and rectangular patterns of river flow. Metamorphic rock in the complex unit consists of chlorite schist, mica schist, glaucophane schist, marble and milonit. Geological structures that are found in the research area consists of three major faults, two left strike slip fault (Amitopa faults and Tahite fault) trending west-northwest, located in the north and south of research area which cut the three existing units, as well as a thrust fault that east-west trending wich cut Complex Metamorphic Rocks. The presence of quartz-like cross cut foliation vein in metamorphic rock associated with economic minerals, such as: gold, cinnabar, & antimony. These minerals have caused a great gold hunt phenomenon in Bombana Regency from 2010 until 2022. Supervised classification from landsat 8 imagery are used to get a development of these illegitimate mining activities and their effect on Poleang’s land use changes.