KARAKTERISTIK ENDAPAN BIJIH BESI LATERIT PADA BLOK BARAT DAN BLOK TIMUR PT SILO, KABUPATEN KOTABARU, KALIMANTAN SELATAN BERDASARKAN ANALISIS GEOKIMIA DAN MINERALOGI

CHARACTERISTICS OF LATERITE IRON ORE DEPOSIT IN WEST BLOCK AND EAST BLOCK OF PT SILO, KOTABARU DISTRICT, SOUTH KALIMANTAN BASED ON GEOCHEMICAL AND MINERALOGICAL ANALYSIS

Authors

  • Ayumi Hana Putri Ramadhani Politeknik Energi dan Pertambangan Bandung Author
  • Andi Cahyadi PT Sebuku Iron Lateritic Ores Author
  • Tatik Handayani Pusat Sumber Daya Mineral Batubara dan Panas Bumi Author
  • Suwahyadi Pusat Sumber Daya Mineral Batubara dan Panas Bumi Author

DOI:

https://doi.org/10.47599/bsdg.v18i3.425

Abstract

This research was conducted to identify the characteristics of laterite deposits in the western and eastern blocks of Sebuku Island, Kotabaru Regency, South Kalimantan using field observation methods, and laboratory analysis including titration, XRF, XRD and petrography analysis. The characteristics of the western block laterite deposits are 10 meters until 15 meters deep. The red limonite zone has Fe content of 51.25% with a mineral composition of hematite, magnetite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 50.1% with a mineral composition of goethite, hematite, gibsite, ilmenite. The saprolite zone has Fe content of 16.2%, the mineral composition is hematite, chrysotile, goethite, garnet, diopside. The characteristics of the eastern block laterite deposits are that they have a depth of 6 meters until 7.5 meters. The red limonite zone has Fe content of 47.38% with a mineral composition of hematite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 38.70% with a mineral composition of goethite, hematite, chromite, gibbsite, spinel. The saprolite zone has Fe content of 15.08%, the mineral composition is hematite, goethite, diopside, fayalite. The bedrock of the research area is in the form of periodotite, namely dunite and harzburgite which have been serpentinized. The mineral composition of the bedrock is olivine, pyroxene, opaque minerals and several secondary minerals, namely serpentine and talc. The west block bedrock has Fe content of around 7.73 % until 8.03% while the east block bedrock has Fe content of around 6.59 % until 7.49%.

References

Cahyadi, A., Krisnanto, Y., Herkusuma, D. S., Budiansyah, A., Kadarusman, A., dan Swamidhrma, Y. C. A. 2017. Geology Of Sebuku and Mineral Deposit Potentials. Malang: PIT IAGI 2017 Malang.

Elias, M., 2005, Nickel Laterite Deposits - Geological Overview, Resources and Exploitation, Centre for Ore Deposit Research, University of Tasmania

Evans, A. M., 1993, Ore Geology and Industrial Minerals: An Introduction, Blackwell Publishing: Oxford.

Gleeson, S. A., Butt, C. R. M., dan Elias, M., 2003, Nickel Laterites: A Review, SEG Newslette.

Kadarusman, A., 2009, Ultramafic Rocks Occurences in Eastern Indonesia and their Geological Setting, The 38th IAGI Annual Convention and Exhibition.

Rustandi E., Nila E.S., dan Sanyoto P. 1986. Laporan Geologi Lembar Kotabaru Kalimantan Selatan Skala 1: 250.000, Pusat Survei Geologi, Bandung.

Rustandi, E., Nila, E. S., Sanyoto, P., dan Margono, V., 1995, Peta Geologi Lembar Kotabaru, Kalimantan Skala 1 : 250.000, Pusat Penelitian dan Pengembangan Geologi: Bandung.

Rollinson, H., 1983, The Geochemistry of Mafic and Ultramafic Rocks from the Archaean Greenstone Belts of Sierra Leone, Mineralogical Magazine.

Streckeisen, A., 1976, To Each Plutonic Rock its Proper Name, Earth Science Reviews, International Magazine for Geo-Scientists. Amsterdam. Vol.12

Sutisna, D. T., 2006, Tinjauan Umum Potensi dan Pemanfaatan Cebakan Bijih Besi di Indonesia, Buletin Sumberdaya Geologi, vol. 2.

Yuwono, Y. S., 1987, Petrology of the Cretaceous Magmatic Rocks from Meratus Range, Southeast Kalimantan, Journal of Southeast Asian Earth Sciences.

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Published

2024-01-08

Issue

Vol. 18 No. 3 (2023): Buletin Sumber Daya Geologi

Section

Buletin Sumber Daya Geologi

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