SIHOMBING, DANIEL PATUAN (2015) PENGIDENTIFIKASIAN MINERAL SULFIDA OROGENIK PADA LAPANGAN “GERRARD”, KABUPATEN BOMBANA, SULAWESI TENGGARA DENGAN MENGGUNAKAN METODE GEOLISTRIK INDUKSI POLARISASI (IP) IDENTIFICATION OF OROGENIC SULFIDE MINERAL AT “GERRARD FIELD”, BOMBANA DISTRICT, SOUTH EAST SULAWESI USING GEOELECTRICAL INDUCED POLARIZATION (IP) METHOD. Masters thesis, UPN "VETERAN" YOGYAKARTA.
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Abstract
Indonesia merupakan salah satu negara yang memiliki cadangan mineral
sulfida dalam jumlah yang relatif besar. Hal tersebut disangkutpautkan dengan
lokasi indonesia yang berada pada daerah ring of fire. Salah satu penelitian yang
telah dilakukan untuk eksplorasi mineral sulfida adalah pengidentifikasian mineral
sulfida orogenik pada daerah Lapangan “Gerrard”, Kabupaten Bombana, Sulawesi
Tenggara dengan menggunakan metode geolistrik induksi polarisasi (IP) dengan
tujuan penelitian untuk mengindentifikasi zona mineralisasi berdasarkan peta
penampang resistivitas dan penampang chargeability dan mendapatkan
penyebaran zona mineralisasinya.
Penelitian dilakukan pada Lapangan “Gerrard”, Kabupaten Bombana,
Sulawesi Tenggara dengan menggunakan metode IP konfigurasi dipole-dipole
sebanyak 6 lintasan. Seluruh lintasan memiliki panjang 310 meter dengan spasi 10
meter. Arah lintasan pada daerah penelitian adalah N0600E dan N1000E. Akuisisi
data menghasilkan data potensial listrik (V), kuat arus (I), resistivitas semu (Rho),
dan chargeability (M) dan diolah dengan menggunakan software Res2dinV hingga
menghasilkan penampang resistivitas dan chargeability. Hasil pengolahan
software Res2dinV juga akan digunakan untuk membuat pemodelan 3D
chargeability menggunakan software RockWork.
Berdasarkan penelitian didapatkan zona mineralisasi sulfida pada
Lapangan “Gerrard” memiliki nilai chargeability >200 msec berada pada seluruh
lintasan penelitian dan menyebar pada batuan metasedimen dengan nilai
resistivitas 50 – 1000 ohm.m dan batuan metamorf sekis lapuk dengan nilai
resisitivitas 1000 – 5000 ohm.m; dan sekis fresh dengan nilai resistivitas 5000 –
11000 ohm.m.. Penyebaran mineralisasi sulfida berada pada koordinat 377520 ;
9484450 dari kedalaman 90 m hingga kedalaman 115 m, koordinat 377390 ;
9484600 dari kedalaman 125 m hingga kedalaman 145 m, koordinat 377410 ;
9484580 dari kedalaman 180 m hingga kedalaman 215 m.
Kata Kunci : metode geolistrik, induksi polarisasi, dipole-dipole, resistivity,
chargeability, mineral sulfida.
Indonesia is a country that has mineral reserves of sulfide mineral in
relatively large amounts. It is implicated in Indonesian locations that are in the
ring of fire region. One of the studies that have been conducted for sulfide mineral
exploration is the identification of orogenic sulfide mineral at "Gerrard" Field,
Bombana, Southeast Sulawesi using geoelectrical induced polarization (IP)
method for the purpose of research to identify the mineralized zones based on
pseudosection resistivity and pseudosection chargeability and to get the
deployment zone of mineralization.
Studies were conducted in "Gerrard" Field, Bombana, Southeast Sulawesi
using induced polarization dipole-dipole configuration and has 6 tracks. Has a
track length of 310 meters with 10 meters distance between spacing and azimuth
track N060ºE and N100ºE. Data acquisition generates electric potential value (V),
currents (I), apparent resistivity (Rho), and chargeability (M) and processed using
software Res2dinV to generate pseudosection resistivity and chargeability.
Res2dinV software processing results will also be used to create a chargeability
3D modeling using RockWork software.
Based on research obtained sulphide mineralized zones on the "Gerrard"
Field has a chargeability values >200 msec were on the whole track of research
and spreads on metasediment rock with resistivity values of 50-1000 ohm.m and
metamorphic rocks weathered schist with resistivity values from 1000 to 5000
ohm.m ; and fresh schist with resistivity values from 5000 to 11000 ohm.m..
Dissemination of sulphide mineralization located at coordinates 377520; 9484450
from a depth of 90 m to a depth of 115 m, the coordinates 377390; 9484600 from
a depth of 125 m to a depth of 145 m, the coordinates 377410; 9484580 from a
depth of 180 m to a depth of 215 m.
Keywords: geoelectric method, induced polarization, dipole-dipole, resistivity,
chargeability, sulfide mineral.
| Item Type: | Thesis (Masters) |
|---|---|
| Subjek: | Q Science > QC Physics |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Bugel Suryanta |
| Date Deposited: | 18 May 2016 06:50 |
| Last Modified: | 18 May 2016 06:50 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/1476 |
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