Characteristics of Chromite Deposits at North Kabaena District, Bombana Regency, Southeast Sulawesi Province, Indonesia

Authors

  • Hasria Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia
  • Masri Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia
  • Suryawan Asfar Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia
  • Arisona Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia
  • Ali Okto Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia
  • La Ode Restele Department of Geography, Halu Oleo University, Kendari, Indonesia
  • La Ode Ngkoimani Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia
  • Rika Yustika Department of Geological Engineering, Halu Oleo University, Kendari, Indonesia

DOI:

https://doi.org/10.25299/jgeet.2021.6.2.6424

Keywords:

Chromite, peridotite, serpentinite, olivine, podiform

Abstract

The study area is located in North Kabaena District, Bombana Regency, Southeast Sulawesi. This paper is aimed to describe characacristics of chromite deposits.  This study is conducted in three stages, three stages including desk study, field work and laboratory analysis. Desk study mainly covers literature reviews. Field work includes mapping of surface geology and sampling of representative rocks types. Laboratory analysis includes the petrologic observation of handspecimen samples, petrographic analysis of the thin section and ore microscopy for polished section. The results of petrographic analysis show that olivine minerals are generally replaced by minerals orthopyroxene and has been alterated by lizardite type serpentine veins with a fractured structure. The mineral olivine is also replaced by the mineral chrysotile as a secondary mineral with a fibrous structure. Based on ore microscopy analysis show that chromite has generally experienced a lateritification process and has been replaced by magnetite, hematite and geotite minerals. Chromite has experience process of weathering and alteration from its source rock caused by tectonics that occurred in the study area. The results shows that the characteristics of chromite deposits in North Kabaena District Chromite deposits has generally encountered in peridotite rock which have a grain size of 0.3-20 cm. Furthermore, chromite deposits in the study area are also encountered in podiform deposits, distributed locally and shows podiform to tubular shape with the dimensions of 30-60cm.

Downloads

Download data is not yet available.

References

Ibrahim, M. A., Rustandi, U., Suryana, A. 2014. Penyelidikan Bitumen Padat Daerah Pulau Kabaena Kabupaten Bombana, Provinsi Sulawesi Tenggara, in: Proceeding Pusat Sumber Daya Geologi. pp. 1–10.

Lintjewas, L. 2015. Tipe Endapan Kromit Di Daerah Konawe Utara Propinsi Sulawesi Tenggara, Pemaparan Hasil Penelitian Geoteknologi 2015.

McClay, K. 1992. The Mapping of Geological Structures. John Wiley & Sons, K. R. McClay Department of

Geology Royal Holloway and Bedford New College Universiry of London.

Moe’tamar 2005. Inventarisasi Dan Evaluasi Mineral Logam Di Daerah Kabupaten Bombana Dan Kabupaten Muna Provinsi Sulawesi Tenggara. Direktorat Inventarisasi Sumber Daya Mineral, Bandung.

Mosier, L.M., Singer, D.A., Moring, B.C., Galloway, J.P. 2012. Podiform Chromite Deposits-Data Base an Grade and Tonnage Models, U.S Geological Survey, Reston, Virginia.

Purawiardi, R. 2014. Karakteristik Bijih Kromit Barru, Sulawesi Selatan. J. Ris. Geol. dan Pertamb. 18, 1.

Rasilainen, K., Eilu, P., Halkoaho, T., Karinen, T., Konnunaho, J., Kontinen, A., Törmänen, T. 2016. Quantitative assessment of undiscovered resources in stratiform and podiform chromite deposits in Finland, Tutkimusraportti - Geologian Tutkimuskeskus.

Robinson, P.T., Zhou, M.F., Malpas, J., Bai, W.J. 1997. Podiform Chromitites.pdf. J. Econ. Geol. 20, 247–252.

Santoso, B., Supriyana, E., Wijatmoko, B. 2016. Pendugaan Mineral Kromit dengan Metode Electricalresistivity Tomography di Daerah Wosu-Morowali Sulawesi Tengah. Proceeding Semin. Nas. MIPA 2016 27–28.

Simandjuntak, T., Surono., Sukido. 1993. Peta Geologi Lembar Kolaka , Sulawesi, Skala 1:250.000. Pusat Penelitian dan Pengembangan Geologi, Bandung.

Surono, 2013. Geologi Lengan Tenggara Sulawesi. Badan Geologi, Kementerian Energi dan Sumber Daya Mineral Jl. Diponegoro No. 57 Bandung 40122 Telp. 022-7215297, Fax. 022-7218154.

Zhou, M.F., Robinson, P.T. 1997, Origin and Tectonic Enviroment of Podiform Chormite Deposits: Journal Economic Geology, 92, p. 259-26.

Downloads

Published

2021-06-08

Issue

Vol. 6 No. 2 (2021): JGEET Vol 06 No 02 : June (2021)

Section

Research Articles

License

Copyright @2019. This is an open-access article distributed under the terms of the Creative Commons Attribution-ShareAlike 4.0 International License which permits unrestricted use, distribution, and reproduction in any medium. Copyrights of all materials published in JGEET are freely available without charge to users or / institution. Users are allowed to read, download, copy, distribute, search, or link to full-text articles in this journal without asking by giving appropriate credit, provide a link to the license, and indicate if changes were made. All of the remix, transform, or build upon the material must distribute the contributions under the same license as the original. 

Most read articles by the same author(s)