MAULANA, AMZA (2023) PENENTUAN PROSPEK AREA TAMBANG PASIR BERDASARKAN DATA GEOLISTRIK KONFIGURASI WENNER-SCHLUMBERGER DI DAERAH SRUMBUNG, KABUPATEN MAGELANG, JAWA TENGAH. Other thesis, UPN "Veteran" Yogyajarta.
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Abstract
vii
ABSTRAK
PENENTUAN PROSPEK AREA TAMBANG PASIR
BERDASARKAN DATA GEOLISTRIK KONFIGURASI WENNER-
SCHLUMBERGER DI DAERAH SRUMBUNG, KABUPATEN
MAGELANG, JAWA TENGAH
Oleh :
Amza Maulana
115.190.072
Kegiatan penambangan pasir sudah dilakukan bertahun-tahun di daerah
Srumbung, Kab. Magelang, Jawa Tengah. Tetapi, belum semua tempat sudah
dilakukan penambangan karena minimnya informasi kuantifikasi dari area tersebut.
Maka dari itu, penelitian kali ini bertujuan untuk mengetahui dimana area prospek
tambang beserta jumlah estimasi cadangan pasir.
Metode yang digunakan yaitu geolistrik resistivitas, Konfigurasi Wenner-
Schlumberger, menggunakan 14 lintasan dengan panjang perlintasan 240 m.
Metode ini digunakan karena keunggulannya yang mampu untuk mendeteksi
adanya sifat tidak homogen pada lapisan batuan di bawah permukaan. Pengolahan
data dilakukan untuk menghasilkan penampang resistivitas 2 dimensi, pemodelan
geologi, dan pemodelan 3 dimensi.
Analisis dan interpretasi yang dihasilkan dari penampang 2 dimensi yaitu
terdapat litologi endapan pasir - andesit dengan nilai resistivitas dari 153 Ohm.m –
451 Ohm.m pada seluruh lintasan pengukuran. Hasil tersebut diperkuat dengan
analisa pemodelan 3 dimensi yang menunjukan keberadaan persebaran endapan
pasir terlihat dari timur laut menumpuk sampai arah mata angin barat daya hingga
kedalaman 40 meter. Berdasarkan perhitungan dengan menggunakan software
Rockworks, diperoleh volume endapan pasir sebesar 2.791.000 m3. Sehingga,
dengan mengacu tabel densitas, nilai densitas pasir berkisar antara 1,7
gr/cm3sampai 2,3 gr/cm3, maka diketahui total potensi sumber daya pasir yaitu
berkisar antara 4.744.700 ton sampai 6.419.300 ton.
Kata kunci : Endapan Pasir, Resistivitas, Geolistrik, Wenner-Schlumberger
viii
ABSTRACT
SAND MINING PROSPECT DETERMINATION BASED ON
WENNER-SCHLUMBERGER CONFIGURATION GEOELECTRIC
DATA IN SRUMBUNG AREA, MAGELANG DISTRICT, CENTRAL
JAVA
By:
Amza Maulana
115.190.072
Sand mining activities have been carried out for years in the Srumbung area,
Kab. Magelang, Central Java. However, not all places have been mined due to the
lack of quantification information from these areas. Therefore, this research aims
to find out where the mining prospect areas are and the estimated amount of sand
reserves.
The method used is geoelectric resistivity, Wenner-Schlumberger
configuration, using 14 tracks with a crossing length of 240 m. This method is used
because of its superiority in being able to detect inhomogeneous properties in rock
layers below the surface. Data processing is carried out to produce 2-dimensional
resistivity cross-sections, geological modeling and 3-dimensional modeling.
The analysis and interpretation resulting from the 2-dimensional cross section
is that there is sand - andesite deposit lithology with a resistivity value of 153
Ohm.m – 451 Ohm.m on the entire measurement path. These results are
strengthened by 3-dimensional modeling analysis which shows that the distribution
of sand deposits can be seen from the northeast to the southwest to a depth of 40
meters. Based on calculations using Rockworks software, the volume of sand
deposits was obtained at 2,791,000 m3. So, by referring to the density table, the
sand density value ranges from 1.7 gr/cm3 to 2.3 gr/cm3, so it is known that the
total potential sand resources range from 4,744,700 tonnes to 6,419,300 tonnes.
Keywords : Sand Deposit, Resistivity, Geoelectrical, Wenner Schlumberger.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Sand Deposit, Resistivity, Geoelectrical, Wenner Schlumberger |
| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Eko Yuli |
| Date Deposited: | 27 Sep 2023 02:36 |
| Last Modified: | 27 Sep 2023 02:36 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/37710 |
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