YAHYA BM, ABDULLAH (2014) APLIKASI METODE RESISTIVITAS KONFIGURASI WENNER-SCHLUMBERGER UNTUK MENGIDENTIFIKASI STRUKTUR DAN GEOMETRI LAPISAN BATUBARA PADA DAERAH SAMBOJA, KABUPATEN KUTAI KERTANEGARA, PROVINSI KALIMANTAN TIMUR. Other thesis, UPN ''VETERAN'' YOGYAKARTA.
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Abstract
Daerah Samboja, Kabupaten Kutai Kertanegara, Provinsi Kalimantan Timur merupakan wilayah yang sebagian besar masih berupa hutan belantara dan terdapat indikasi keberadaan batubara dipermukaan. Untuk mengidentifikasi kondisi lapisan batubara di bawah permukaan dilakukan survei geofisika menggunakan metode geolistrik resistivitas menggunakan konfigurasi wenner-Schlumberger. Penelitian ini bertujuan mengidentifikasi keberadaan batubara di bawah permukaan, mengetahui struktur yang berkembang, memprediksi geometri lapisan batubara, dan melokalisir area keterdapatan batubara pada daerah penelitian. Pendekatan yang digunakan adalah berdasarkan respon nilai resistivitas serta interpretasi secara kualitatif dan kuantitatif. Metode resistivitas konfigurasi Wenner-Schlumberger cukup efektif untuk eksplorasi batubara di suatu titik pengukuran dikarenakan memiliki sensitivitas lateral yang lebih baik, dan untuk kemenerusan lapisan batubara juga dapat diidentifiaksi sebagai struktur geologi akibat adanya perubahan nilai yang signifikan secara lateral. Data yang digunakan berupa data sekunder berupa nilai potensial (mV), arus listrik (mA), hambatan listrik (Ohm), Faktor geometri (m), dan lokasi titik pengukuran geolistrik. Penelitian ini menggunakan 26 lintasan geolistrik resistivitas, serta spasi antar elektroda 5 meter dan meningkat sesuai nilai faktor “n” dengan panjang masing-masing lintasan adalah 200 meter. Hasil interpretasi dari penampang geolistrik 2D didapatkan hasil bahwa interpretasi profil 2D yang menunjukan pola lapisan batubara memiliki nilai resistivitas berkisar antara >400 Ohm.m, resistivitas lapisan batulempung berkisar antara 10-100 Ohm.m, dan lapisan batupasir berkisar antara 100 -400 Ohm.m. Kedalaman serta ketebalan lapisan batubara bervariasi dari setiap lintasan pengukuran, dengan kedalaman yang berkisar 10-25 m dari permukaan. Ketebalan lapisan batubara diperkirakan antara 5-7 meter. Terdapat struktur sesar minor berupa sesar naik dan sesar turun. Peta persebaran lapisan batubara diperkirakan kemenerusan lapisan relative berarah baratdaya ke timurlaut. Kata kunci : batubara, resistivitas, Wenner-Schlumberger, Kalimantan Timur A half more of Samboja, Kutai Kartanegara District, East Borneo Province are forest and there is indication of coal on surface. To identifying condition of coal at subsurface doing geophysics surveys have been carried out using geophysics survey like geoelectric resistivity method using the Wenner-Schlumberger array. This study aims to identifying pesence of coal beneath the surface, determine the structures growth , prediction of geometry coal seam, and localized coal indication. The value resistivity response is to approach interpretation of qualitative and quantitative . Resistivity method using Wenner-Schlumberger array effectively to coal exploration at measure point because of its has good lateral sensitivity, and continuio of coal seam also can identifying as structures geology because changing of lateal value is significant The data used are secondary data in the form of potential value (mV), electric current (m), electrical resistance (Ohm), the geometry factor (m), and the location of the geoelectric measurements. This research use 26 lines geoelectric resistivit , as well as inter-electrode spacing of 5 meters and a corresponding increase value of :n" factor with the length of each track is 200 meter. Interpretation results are geoelectric 2D cross-section results that interpretation of 2D profiles that show a pattern of coal seam which high resistivity values > 400 Ohm.m, resistivity layer ranges between 10-100 Ohm.m sealstone, sandstone layers shaft ranged from 100 -400 Ohm.m. The depth and thickness of coal seams varies from each trajectory measurements, with depths ranging from 10-25 m from the surface.As well as the thickness of the coal seam is estimated between 5-7 meters. There are minor fault structure like normal fault and trusht fault. map of the distribution of coal seams is expected continiou of layer relative to the south-west trending northeast. Keywords : coal, resistivity, Wenner-Schlumberger, East Borneo
| Item Type: | Thesis (Other) |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Erny Azyanti |
| Date Deposited: | 21 Jun 2016 03:29 |
| Last Modified: | 21 Jun 2016 03:29 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/4086 |
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