Pendugaan Mineralisasi Emas Menggunakan Metode Magnetik di Nagari Lubuk Gadang Kecamatan Sangir, Solok Selatan, Sumatera Barat

Firmansyah, Fikri; Budiman, Arif

doi:10.25077/jfu.8.1.77-83.2019

Cited by 5 publications

(4 citation statements)

References 0 publications

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“…We removed the external magnetic field using daily variation correction to get the magnitude of the obtained magnetic field anomaly in the field. The main magnetic field was removed using IGRF correction (Firmansyah & Budiman, 2019). IGRF values can be obtained from the online website of the National Geophysical Data Center (NGDC).…”

Section: Resultsmentioning

confidence: 99%

2D Surface Structure Modeling in Bengkulu City using Geomagnet Method

Ramdani

Refrizon²,

Yuliza³

et al. 2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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Research on 2D modeling of the subsurface structure of the Bengkulu city area was carried out using the geomagnetic method. In this study, we collected data from 130 measurement points using a set of Proton Procession Magnetometers (PPM) to obtain the total magnetic field value. The measurement data were processed by making corrections of daily variations and IGRF (International Geomagnetic Reference Field). We conducted data correction to contour the total magnetic field anomaly. After that, the contour of total magnetic field anomaly was used for the reduction to the poles. This research results from the total magnetic field anomaly show a pair of positive and negative closures. Cross-sections were made on the positive and negative closure pairs to determine the subsurface structure of the area by making a 2-dimensional (2D) model using Mag2DC software. The interpretation of the 2D modeling results shows that three rock layers are continuously arranged. The average susceptibility value of the first layer is 0.00001 cgs which is a sandstone layer at a depth of 0-400 meters; the second layer has an average susceptibility value of 0.002 cgs which is dominated by clay at a depth of 400-700 meters, and; the third layer has an average susceptibility value of 0.006 cgs which is a basalt rock layer at a depth of 700-1000 meters.

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Section: Resultsmentioning

confidence: 99%

2D Surface Structure Modeling in Bengkulu City using Geomagnet Method

Ramdani

Refrizon²,

Yuliza³

et al. 2023

jppipa, pendidikan ipa, fisika, biologi, kimia

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“…The polar reduction process is needed to localize the presence of anomaly sources in the study area [23] . The local anomaly contour image resulting from the reduction to the poles, where it can be seen that there are differences in anomaly values, is very influential when the reduction to the poles transformation has been carried out after the reduction to the poles transformation process, the anomaly value becomes higher.…”

Section: Reduction To the Polesmentioning

confidence: 99%

Identification of Geothermal Distribution in The Banyu Biru Hot Water Source using The Magnetic Method

Luthfin,

Jubaidah

2023

Indonesian J Appl Phys

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<p class="Abstract">The geothermal phenomenon in Banyu Biru hot springs in Gondangwetan Village, Jatikalen District, Nganjuk Regency, has the potential to be developed into a tourist spot and an alternative renewable energy source that is environmentally friendly; for example, a geothermal power plant. So it is necessary to know the distribution of geothermal reservoirs and how much potential energy is contained. This research aims to determine the distribution of geothermal energy in the research area and its geological structure. This study used the Magnetic Method for secondary data obtained from NOAA satellite data. Data acquisition with an area of 2000 meters x 2000 meters obtained 100 data with a spacing of 200 meters. Based on research results, geothermal bursts have a low anomaly value of -50 nT to 25 nT. The low anomaly distribution can be used to determine the geothermal distribution in the area, assuming that areas with the same anomaly value indicate the presence of geothermal energy. The geology of the study area has five layers, namely: Topsoil (soil) has a susceptibility value of 0.0000377 SI, Alluvium has a susceptibility value of 0.00144513 SI, Tufan Clay has a susceptibility value of 0.00692407 SI, Limestone Tuff has a susceptibility value of 0.125713399 SI and Breccia (Andesite and Basalt) has a susceptibility value 0.0126292 SI. The depth of the geothermal source in the study area is ± 250 meters below the surface.</p>

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“…Iron is an element that is abundant in the earth's crust which is about 5% and is rarely found in the free state. Fe is one of the elements that form magnetic minerals found in every sample that has been measured [18]. The sample was measured using Bartington MS2B located at the Geophysics Laboratory of the Faculty of Mathematics and Natural Sciences, Padang State University, in June 2020.…”

Section: Preparation and Determination Of Sample Element Compositionmentioning

confidence: 99%

Identification of Rock Types from Iron Sand at Pasia Jambak Beach, Padang, West Sumatra

Visgun

Rifai

Rahmayuni

et al. 2022

J. Phys.: Conf. Ser.

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West Sumatera is a region that has an abundance of natural resources in the form of iron sand, one of which is in the area of Pasia Jambak Beach, Padang. Pasia Jambak Beach is one type of beach in rumps and sandy beaches, which has grayish-brown sand and rough grains on its surface. Iron sand could be formed due to weathering of rocks and materials found around the coast, such as old ships and others. This study aims to see the type rock of origin and the composition of the magnetic mineral elements found in the iron sand of Pasia Jambak Beach. The composition of iron sand-forming elements can be seen using XRF. The analysis results using XRF showed that the most dominant element in the samples was Si (Silica) and Fe (Ferrum). Based on the SiO2 vs K2O diagram, it can be seen that the iron sand in the Pasia jambak Beach area comes from weathering of Basalt, Dacite, and Latite rocks. So, it could be concluded that the original rock group from iron sand at Pasia Jambak Beach is the Calc-Alkaline group (medium Potassium content) and High K Calc-Alkaline (high Potassium content).

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Pendugaan Mineralisasi Emas Menggunakan Metode Magnetik di Nagari Lubuk Gadang Kecamatan Sangir, Solok Selatan, Sumatera Barat

Cited by 5 publications

References 0 publications

2D Surface Structure Modeling in Bengkulu City using Geomagnet Method

2D Surface Structure Modeling in Bengkulu City using Geomagnet Method

Identification of Geothermal Distribution in The Banyu Biru Hot Water Source using The Magnetic Method

Identification of Rock Types from Iron Sand at Pasia Jambak Beach, Padang, West Sumatra

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