GEOLOGI DAN STUDI NIKEL LATERIT DAERAH TANGKETADA DAN SEKITARNYA, KECAMATAN POMALAA, KABUPATEN KOLAKA, PROVINSI SULAWESI TENGGARA

PRASETYO, SIDDIQ (2013) GEOLOGI DAN STUDI NIKEL LATERIT DAERAH TANGKETADA DAN SEKITARNYA, KECAMATAN POMALAA, KABUPATEN KOLAKA, PROVINSI SULAWESI TENGGARA. Undergraduate thesis, UPN "Veteran" Yogyakarta.

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    Abstract

    ABSTRAK Secara administratif daerah telitian termasuk dalam wilayah Desa Tangketada, Kecamatan Pomalaa, Kabupaten Kolaka, Provinsi Sulawesi Tenggara. Daerah telitian terletak pada koordinat 343000 – 346000 mE dan 953000 – 9533000 mN, zona 51 belahan bumi selatan. Daerah telitian dibagi menjadi 3 satuan geomorfik, antara lain Satuan Perbukitan Berlereng Agak Curam – Curam, Satuan Perbukitan Landai – Miring, dan Satuan Tubuh Sungai. Daerah telitian terdiri dari beberapa satuan batuan dari tua ke muda, antara lain Satuan Peridotit, Satuan Serpentinit, dan Satuan Endapan Aluvial. Struktur yang berkembang pada daerah telitian adalah kekar dengan arah umum relatif barat laut – tenggara. Tidak ditemukan struktur sesar maupun lipatan dalam daerah telitian. Kadar Ni, Fe, Mg, dan SiO2 didapat dari sampel pada zona saprolit daerah telitian yang kemudian dianalisa kimia. Dari analisa hubungan unsur Ni dengan unsur lain pada zona saprolit dengan menggunakan grafik dan peta anomali geokimia, kenaikan maupun penurunan unsur Ni berbanding lurus dengan Fe dengan persebaran relatif meningkat kadarnya pada bagian selatan daerah telitian. Kenaikan dan penurunan kadar unsur Ni berbanding terbalik dengan unsur MgO dan SiO2 yang memiliki persebaran relatif meningkat kadarnya pada bagian utara dan barat laut daerah telitian. Dapat disimpulkan bahwa kadar dan persebaran Ni, Fe, Mg, dan SiO2 pada daerah telitian dipengaruhi oleh morfologi dan tingkat pelapukan atau pencucian batuan dasar. ABSTRACT Administratively, the location of the research area included in Tangketada Village, Pomalaa District, Kolaka City, Southeast Celebes Province. Geographically located between X : 343000 – 346000 and Y : 953000 – 9533000, zone 51 southern hemisphere. The research area is devided into three geomorphic units, that are : rather steep – steep sloping hills, gently – angled sloping hills, and river body. The research area is composed by several rock from old to young, that are : Peridotite Unit, Serpentinite Unit, Alluvial Deposit Unit. Geological structure that developed in the research area is crack with northwest – southeast general direction. No more geological structure were discovered in the research area, such as fault and fold structure. Contents of Ni, Fe, MgO, and SiO2 were obtained from several samples of saprolite zone in the research area that were analyzed about its chemistry contents. According to analysis results by graphic and geochemistry map of relationship between Ni and another elements, increased and decreased levels of Ni are same with Fe. Both of Ni and Fe have a big content in the south of research area. Increased and decreased levels of Ni are inversly with MgO and SiO2. MgO and SiO2 have a big content in the north and northwest of research area. It can be concluded that distribution of Ni, Fe, MgO, and SiO2 in the research area are affected by morphology and weathering or leaching level of bedrock.

    Item Type: Thesis (Undergraduate)
    Subjects: 500 Sains dan Matematika
    Divisions: Fakultas Teknologi Mineral > Teknik Geologi
    Depositing User: Ratna Sufiatin
    Date Deposited: 10 Apr 2013 13:27
    Last Modified: 10 Apr 2013 13:27
    URI: http://repository.upnyk.ac.id/id/eprint/5708

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