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
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%.
Downloads
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.
Copyright (c) 2024 Buletin Sumber Daya Geologi
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
Authors whose manuscripts are published agree to the following terms:
The publication rights of all journal manuscript materials published on the Buletin Sumber Daya Geologi website are held by the editorial board with the knowledge of the author (moral rights remain with the manuscript’s author).
The formal legal provisions for access to digital articles in this electronic journal are subject to the terms of the Creative Commons Attribution-ShareAlike (CC BY-SA) license. This means that Buletin Sumber Daya Geologi has the right to store, convert media/formats, manage in the form of a database, maintain, and publish the article without requesting permission from the author, as long as the author’s name is cited as the copyright holder.
Manuscripts published in both print and electronic formats are open access for educational, research, investigative, and library purposes. Beyond these purposes, the editorial board is not responsible for any violations of copyright law.
