Pengaruh Relief  Topografi Terhadap Daerah Prospek Nikel Laterit Kecamatan Bahodopi Kabupaten Morowali Provinsi Sulawesi Tengah

Sri Epi Astuti; Anshariah Anshariah; Habibie Anwar; Djamaluddin Djamaluddin

doi:10.58227/jmi.v1i1.39

Authors

Sri Epi Astuti
Anshariah Anshariah Universitas Muslim Indonesia
Habibie Anwar Universitas Muslim Indonesia
Djamaluddin Djamaluddin Universitas Hasanuddin

DOI:

https://doi.org/10.58227/jmi.v1i1.39

Keywords:

morphology, slopes, limonite, saprolite, Bahodopi

Abstract

Nickel laterite deposit is a result of weathering processes of ultramafic rocks which carry Ni-Silicate. Generally the deposit is found from tropical to subtropical climates. The aim of this research was to find out the influence of the ground slope to the thickness zone of the nickel laterite based on the cross-section of the drill hole. The research method was to create the cross-section nickel laterite. The data ware obtained from assay data, coordinate, drilling points distribution, and cross-section of the drill hole. From cross-section of the drill hole, the data regarding the level of Ni and Fe were obtained. From the hole id 5A_0171, the lowest Ni level for limonite was 0.19%, and the highest level was 1.17% and for the Fe level, the lowest was 32.13% and the highest was 49.84% with the depth ranging from 0 to 18 metres. The lowest Ni level for the saprolite was 0.79% and the highest was 2.04% whereas for the Fe level, the lowest was 9.97% and the highest was 15.77% with the depth ranging from 18 to 25 metres. The lowest Ni level for the bedrock was 0.29% and the highest was 0.56% whereas for its Fe level, the lowest was 6.91% and the highest was 8.67% with the depth ranging from 25 to 27 metres. The concluding data for the sloppy areas from the steep to slightslopes was that the limonite zone tended to follow the surface morphology pattern with the thickening occurrence in the steep slopes however the saprolite zone did not follow the surface morphology but it became thick in the steep slopes.

References

Ahmad, W. (2006). LATERITES: Fundamentals of Chemistry, Mineralogy, Weathering Processes and Laterite Formation, Property of PT. INCO for Laterite Ore Manual.

Arifin, M., Widodo, S., & Anshariah, A. (2015). Karakteristik Endapan Nikel Laterit Pada Blok X Pt. Bintangdelapan Mineral Kecamatan Bahodopi Kabupaten Morowali Provinsi Sulawesi Tengah. Jurnal Geomine, 1(1), 37-45.

Aswadi, M., Husain, J. R., Gazali, A., & Thamsi, A. B. (2022). Spread Of Laterite Nickel Based on Drill Data at PT Manunggal Sarana Surya Pratama, Southeast Sulawesi Province. Journal of Geology and Exploration, 1(2), 51-57.

Butt, C. R., Lintern, M. J., & Anand, R. R. (2000). Evolution of regoliths and landscapes in deeply weathered terrain—implications for geochemical exploration. Ore Geology Reviews, 16(3-4), 167-183.

Dermawan, A. (2020). Penyebaran Nikel Laterit Mengunakan Korelasi Lapisan Pada PT Vale Indonesia Site Pomalaa, Kabupaten Kolaka, Sulawesi Tenggara. Jurnal Geomine, 8(1), 44-50.

Jafar, N., Wahid, H., & Widodo, S. (2022). Classification of Ni Levels for Determination Cut-Off Grade in Region X. Journal of Geology and Exploration, 1(1), 1-7.

Mustika, R. (2015). Estimasi Sumberdaya Nikel Laterit Dengan Metode Inverse Distance Weighting (Idw) Pada PT. Vale Indonesia, Tbk.. Kecamatan Nuha Provinsi Sulawesi Selatan. Jurnal Geomine, 1(1).

Nurjayanty, Y., Djamaluddin, D., & Budiman, A. A. (2022). Block Model of Laterite Nickel Reserve in the Sorowako Village Research Area, South Sulawesi Province. Journal of Geology and Exploration, 1(1), 18-21.

Rafsanjani, M. R. (2016). Estimasi Sumberdaya Bijih Nikel Laterit Dengan Menggunakan Metode IDW Di Provinsi Sulawesi Tenggara. Jurnal Geomine, 4(1).

Thamsi, A. B., Ainunnur, I., Anwar, H., & Aswadi, M. (2023). ESTIMASI SUMBERDAYA NIKEL MENGUNAKAN METODE INVERSE DISTANCE WEIGHT PT ANG AND FANG BROTHERS. JGE (Jurnal Geofisika Eksplorasi), 9(1), 5-17.