GEOLOGI DAN KONTROL BATUAN DASAR TERHADAP KUALITAS ENDAPAN NIKEL LATERIT DI TAMBANG TENGAH, KECAMATAN POMALAA, KABUPATEN KOLAKA, PROVINSI SULAWESI TENGGARA

ASSIDHIQIE, ANGGER IMAS (2022) GEOLOGI DAN KONTROL BATUAN DASAR TERHADAP KUALITAS ENDAPAN NIKEL LATERIT DI TAMBANG TENGAH, KECAMATAN POMALAA, KABUPATEN KOLAKA, PROVINSI SULAWESI TENGGARA. Other thesis, UPN 'Veteran" Yogyakarta.

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Abstract

SARI
Angger Imas Assidhiqie
111.160.078
Daerah penelitian berada area tambang tengah dan sekitar nya, secara administrative
berada di Desa Tambea, Kecamatan Pomalaa, Sulawesi Tenggara. Secara geografis
daerah telitian terletak di koordinat X: 344400-346400 dan Y: 9534550- 9533150 UTM
(Universal Transverse Mercartor) WGS 1984 zona 51S.
Lokasi penelitian termasuk dalam area konsesi PT Antam Tbk. Daerah penelitian secara
geomorfologi tersusun oleh bentuk asal Denudasional, Fluvial dan Antropogenik. Daerah
telitian tersusun oleh batuan ultrabasa, metamorf suhu rendah tekanan tinggi dan
konglomerat serta endapan alluvial. Bentukan morfologi dikontrol oleh proses pensesaran
berupa sesar naik ber arah utara selatan, sesar sinistral berarah tenggara barat laut dan
sesar destral berarah timurlaut-barat daya.
Batuan ultrabasa yang dijumpai termasuk pada kompleks ultramafic dalam sikuen ofiolit
Sulawesi Timur. Ofiolit ini merupakan bagian dari lempeng samudra dari sula spur
kontinen yang terangkat ke permukaan melalui proses obduksi dan termasuk jenis
Oceanic Peridotit/Ophiolit dengan tipe Cordilleran.
Profil laterit di daerah telitian tersusun oleh 4 zona utama, yaitu zona topsoil, zona
limonit, zona saprolit dan zona batuan dasar. Berdasarkan analisa geokimia, terjadi
konsentrasi unsur Ni pada zona saprolit. Mineral logam pembawa unsur Ni yang dijumpai
Antara lain Garnierit dan Krisopras.
Berdasarkan analisa petrologi dan petrografi, batuan dasar pada profil laterit disusun oleh
3 litodem, Peridotit, Dunit dan Serpentinit. Serpentinit merupakan batuan ubahan dari
batuan ultrabasa yang mengalami alterasi hydrothermal lantai samudra. Laterit pada
litodem dunit memiliki ketebalan dan kadar Ni yang lebih tinggi di banding peridoti.
Kata Kunci: Laterit, Bedrock, ESO, Pomalaa

Item Type:	Thesis (Other)
Uncontrolled Keywords:	1 DAFTAR PUSTAKA Asfar, Suryawan; S, Erick. (2019). Karakteristik Batuan Ultrabasa Pada Kompleks Ofiolit Desa Paka Indah Kabupaten Konawe Utara Provinsi Sulawesi Tenggara. Jurnal Rekayasa Geofisika Indonesia, 24-37. Bergman, S. C., Coffield, D. Q., Tablot, J. P., & Garrard, R. A. (1996). Tertiary Tectonic and Magmatic Evolution of Western Sulawesi and The Makassar Strait, Indonesia: evidence for a Miocene Continent-Continent Collision. Geological Society Special Publication, 391-429. Best, M. G. (2003). Igneous And Metamorphic Petrology. Oxford: Blackwell Science Ltd. Brand, N.W; Butt, C.R.M; Elias, M. (1998). Nickel laterites: classification and features. AGSO Journal of Australian Geology & Geophysics, 81-88. Butt, C. R. (2007). Nickle Laterites: Characteristic, Classification And Processing Options. Minerals Exploration Seminar, 10-12. Butt, C. R., & Cluzel, D. (2013). Nickel Laterites Ore Deposite: Weathered Serpentinites. ELEMENTS Vol. 9, 123-128. 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Subjects:	Q Science > QE Geology
Divisions:	Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User:	Eko Yuli
Date Deposited:	15 Mar 2022 05:09
Last Modified:	28 Dec 2022 07:06
URI:	http://eprints.upnyk.ac.id/id/eprint/28964

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