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All Journal SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL Journal of Physics and Its Applications
Rr. Tony Yulianto
Departemen Fisika, Fakultas Sains Dan Matematika, Universitas Diponegoro, Semarang
Astronomy Earth & Planetary Sciences Materials Science & Nanotechnology Mathematics Physics

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PREDIKSI BATAS CEKUNGAN JAWA TIMUR UTARA DENGAN PEGUNUNGAN SELATAN DI DAERAH MAGETAN - PLAOSAN DENGAN METODE GRAVITASI Wijayanti, Dewi; Yulianto, Rr. Tony; Nurwidyanto, M. Irtem
JURNAL SAINS DAN MATEMATIKA Volume 17 Issue 1 Year 2009
Publisher : JURNAL SAINS DAN MATEMATIKA

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Abstract

ABSTRACT-Geophysics investigation with the gravity method to antisipate the existence of boundary  of North East Java Basin with the South Mountains in Magetan - Plaosan have been done at 2 – 11 December 2004 by using gravitymeter La Coste & Romberg type G-I177, and resulted 50 station. Data measured field is the observation gravitation position height and terrain conection for A until D zone. To obtain the complete Bouguer anomaly, reduction of field data was performed with standart  correction. Bouguer density of rock is obtained 2,30 gram/cm3. Regional and residual anomaly was obtained from filtering of complete bouguer anomaly by using polynomial surface fitting. The quantitative analysis of second order residual anomaly was performed by using Grav2DC for windows. The modelling resulted Lawu lava with density 2,35 gram/cm3 and culminate deepness is 300 m, Tuf Jobolarangan with density 2,20 gram/cm3 and culminate deepness is 300 m, sediment rock with density 2,10 gram/cm3 and culminate deepness is 123,84 m, Igneous rock with density 2,70 gram/cm3 and culminate deepness is  1.721,53 m. Basin boundary marked with the exsistence of sediment rock and igneous rock in subsurface of the area. Interpretdion of modelling indicate that Magetan - Plosan area anticipated to represent the south boundary of North East Java Basin with the  South Moantains. Keynotes : Gravity, terrain correction, Bougeur  anomaly
KLASIFIKASI DAERAH LONGSOR BERBASIS PENGOLAHAN CITRA MENGGUNAKAN JARINGAN SYARAF TIRUAN PROPAGASI BALIK Putri Nuriskianti; Kusworo Adi; Tony Yulianto
Youngster Physics Journal Vol 4, No 2 (2015): Youngster Physics Journal April 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Landslides are natural events that occur due to the ground movement of the earth's surface. The movement influenced by its constituent such as soil type, land use and intensity of rainfall in some place that causes a material such as ground was moving. Research on landslide done based on field surveys. The potential of a region in the category of landslides can be done by mapping parameters - parameters of landslides in the form of a calculation using the image of a network system that has been trained to predict the condition of an area.Image processing is done by segmenting color for any information presented in an image of landslides parameters. The color segmentation results performed labeling process to represent the information in the image. Then the landslides indices obtained from the manual calculation of weighting parameters. The result of the calculation is used as an instructional manual for the neural network. Where the value of the index 1 is the lowest level of landslide or safety category. While the index level 5 is the highest landslide or category of highly vulnerable to landslides. To process the data from the manual calculation in artificial neural network using backpropagation algorithm.The research data was training data and testing of tissue obtained from the manual calculation of weighting parameters landslides. Network training successfully conducted with a total accuration (index normal manual landslides and landslide index network) of 100% and accuration of test results 91,2% network. In the training data used 96 samples of data and test data as much as 34 data.Keywords: Landslide index, color segmentation, artificial neural network.
PEMODELAN STRUKTUR BAWAH PERMUKAAN DAERAH SESAR JIWO KLATEN DENGAN METODE MEDAN MAGNET TOTAL Irfan Roismanto; Tony Yulianto
Youngster Physics Journal Vol 2, No 2 (2013): Youngster Physics Journal April 2013
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This study, using the method of total magnetic field in the area of ​​Central Java Klaten, aims to interpret the subsurface structure of the fault zones surrounding Prambanan, Wedi, and Gantiwarno district that became the suspect of the aftershocks cause occurring on May 27, 2006. The total magnetic field measurements use GSM19T Series magnetometre with the accuracy of ± 0.5 nT which includes 158 points. From the interpretation result using the second vertical derivative analysis, it can be known that there are three fault areas which are categorised as normal faults. The first fault is found in the volcanic rocks composed by the layers of volcanic breccia, lava and tuff. It is characterised by a change in the susceptibility value from 0.3 to 0.2 cgs. The second section is in Kebo Butak rock formation comprising the layers of sandstone, clay, silt, and algomerat. It is characterised by changes on the susceptibility values from 0.126 to 0.007cgs and from 0.33 0.126 cgs. The last fault is located in the Semilir formation consisting of tuff rocks, pumice breccias and tuffaceous sandstone marked by changes on the susceptibility values ​​from 0.25 to 0.1 cgs and from 0.5 to 0.25 cgs. Keywords: jiwo fault, total magnetic field, klaten
ANALISIS KERENTANAN AIRTANAH TERHADAP PENCEMARAN DI DATARAN ALLUVIAL KOTA SEMARANG MENGGUNAKAN METODE GOD DENGAN MEMANFAATKAN DATA RESISTIVITAS DAN DATA HIDROGEOLOGI Dhana Hastuti; Tony Yulianto; Thomas Triadi Putranto
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Groundwater is the water resources necessary for living things and the most desirable human. Groundwater needs to increase as the population increase. One example is in the Alluvial Plain of Semarang. To supply water necessary, the population use a tap of aquifer shallow wells. Shallow aquifer vulnerable to contamination due to the effect of shallow depth and human activities. Therefore there is a needed to conduct for research on the groundwater vulnerability due to contamination. GOD is the system to determine of value groundwater vulnerability due to contamination. The parameters used are the type of aquifer (G), type of lithology aquitard (O), and the depth to groundwater table (D). These three parameters derived from resistivity data and hydrogeology data. The results of the analysis by this method has three levels of vulnerability of groundwater due to contamination the area of the vulnerability of low, moderate, and high. So it is recommended that the analysis can be made of the green open area to reduce contamination and groundwater catchment area is formed, and restrict the activities to achieve economic gains and reduce the danger of environmental contamination.
ANALISIS REMBESAN PADA BENDUNGAN CENGKLIK MENGGUNAKAN METODE RESISTIVITAS KONFIGURASI SCHLUMBERGER DAN UJI PERMEABILITAS UNTUK MENGHITUNG DEBIT REMBESAN Fajar Waskito; Tony Yulianto; Dwiyanto Joko Suprapto
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Resistivity method is one of the geophysical method that used to determine the subsurface structure from the resistivity value. The research uses resistivity method with Schlumberger configuration. The measurement have been done in Cengklik Dam which is located in the Ngargorejo village, Ngemplak districts, Boyolali, Central Java. Cengklik dam is used for irrigation, fish farms and tourism. The conditions of Cengklik dam is awful. There are a lot of cracks on the dam body and a spring appears in the southwest of the dam. So, we assumed that there are seepages on the dam. We get the potential and current value from aquisition and they used to calculate the apparent resistivity. IP2WIN software use to calculate and modeling to get the true resistivity and depth of each layers. Then they used as an input on Progress software to get the 3 dimensional modeling using Rockwork 15 software. The model interpreted with geological information to know the lithology. There is a seepage area on the tuff layer and the discharge seepage obtained by using the Slide 6.0 software. The discharge amount of seepage as 9,4576x10-5m3/s.
INTERPRETASI STRUKTUR BAWAH PERMUKAAN BERDASARKAN DATA GEOMAGNETIK PADA DAERAH MATA AIR PANAS JATIKURUNG KABUPATEN SEMARANG Laela Fitria; Tony Yulianto; Udi Harmoko
Youngster Physics Journal Vol 4, No 4 (2015): Youngster Physics Journal Oktober 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The interpretation of subsurface structure and the identification of caused of the hot springs Jatikurung by using magnetic method have been successfully carried out. In this study, magnetic data acquisition was carried out in 71 points by using a PPM (Proton Precession Magnetometer) geometrics type of GSM 19T models to get the values of the total magnetic field. Data processing began with IGRF (International Geomagnetic Reference Field) correction and diurnal correction to get the total magnetic anomaly. The corrected data has been used to create total magnetic anomaly contour. The total magnetic anomaly contour has been used to process reduction to plan surface. The result of reduction to plan surface has been used to create a contour upward continuation and then made reduction to the poles. The result of research showed the total magnetic anomaly closure pair of positive and negative indicated a fault zone below the surface. The closure pair of positive and negative close to the manifestation was made an incision to determine the subsurface structure of the region by creating a model of 2-dimensional (2D) using software Mag2DC. In 2D modeling result show that there was a fault zone about 1200 meters depth. At a depth of 326 to 1200 meters was interpreted as a cap rock with a value 0.2926 (SI). The exhibition of the hot springs Jatikurung was interpreted by the finding of adjacent fault with igneous intrusion which was estimated to save the residual of magma that can be used as a heat source.
ANALISIS INTRUSI AIR LAUT MEGGUNAKAN DATA RESISTIVITAS DAN GEOKIMIA AIRTANAH DI DATARAN ALUVIAL KOTA SEMARANG Tabitha Abid Ardaneswari; Tony Yulianto; Thomas Triadi Putranto
Youngster Physics Journal Vol 5, No 4 (2016): Youngster Physics Journal Oktober 2016
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

emarang lowland-alluvial area is in the state of salt water intrusion, that has a direct impact to the groundwater quality. Groundwater quality is not only triggered by water level decreasing factors due to the groundwater exploitation,but also by the factor of lithology and aquifer condition. The purpose of this research is to know the resistivity rocks value, the value of groundwater quality, and to analyze the distribution of the estimated area that has been instuited by salt water. The result of processed data with Progress 3.0 is in the form of resistivity value which is correlated with groundwater quality testing value with salinity, electrical conductivity, dissolved oxygen, andpH parameters. Based on the geo-resistivity and groundwater geochemical data shows that there is intrusion salt water distribution area which occur in Trimulyo area with the resistivity value of 0,27 Ωm as the indicator of salinity and groundwater quality value parameters which show the salinity value of 3.600 mg/L, electrical conductivity of 6.370 μS/cm, dissolved oxygen of 0,8 ppm, and pH 7,7.
INTERPRETASI STRUKTUR BAWAH PERMUKAAN DAERAH MANIFESTASI MINERAL EMAS SISTEM EPITHERMAL DENGAN METODE POLARISASI TERIMBAS (INDUCED POLARIZATION) DI DAERAH “X” KABUPATEN GARUT JAWA BARAT Alifa Rusyda; Tony Yulianto
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

A geophysical investigation has been done using Induced Polarization Method at area “X”, Garut, West Java. The purpose of this investigation is to identify the sub-surface stucture of a minerals gold epithermal system manifestation area.The research area is a gold prospect area which is a mining concession area ofAneka Tambang, Tbk. Stratigraphy lithology constituent part of the study area Jampang Formation which consists of andesite lava, andesite breccia, hornblende, and fine tuffaceous rocks. Induced Polarization method is usingelectrical properties of rocks by detecting the electrical polarization on the surface of metallic minerals beneath the earth's surfaceThe processed data is measured with Dipole-dipole configuration, with electrodes spaced 25 meters. Path length  200 meters, so the expected penetration depth reaches 600 meters. Data processing use software AGI EarthImager2D and Geosoft , is obtain imaging the model 2D and 3D  subsurface. The processing results is present in 2D and 3D, From the modeling results indicate that the tuff and Crystallin Tuff    rock and minerals sulphide (si-ka-il, ka-il) with resistivity values ranging from 150 to more than 1000 ohm.m ohm.m and chargeabilitas values ranged from 100 ms to more than 300 ms, distribution pattern is decreased from north to south and then to east in penetration depth reaches 600 meters of subsurface.Volume for estimated potential of minerals gold epithermal system manifestation is 161.302.421,7 m3Keywords: Gold, Epithermal System, Induced Polarization, AGI EarthImager2D, Geosoft
APLIKASI METODE MAGNETIK UNTUK MELOKALISASI TARGET ZONA MINERALISASI EMAS DI DAERAH “X” Seftyand S Briyantara; Tony Yulianto
Youngster Physics Journal Vol 4, No 1 (2015): Youngster Physics Journal Januari 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This research aimed to localize the target of the gold mineralized zones are located in “X” area. Based on the evaluation of geological data mineral alteration, lithology, and geology structure, this area is concluded that the mineralization type was High Sulphidation with characteristic alteration found in the form of quartz, phyropilite, allunite, muscovite, smectite and kaolinite.The methods are processing data using Oasis Montaj software which then created the total magnetic intensity map. Of the total magnetic intensity map was filtered to produce 50 meters upward continuation and RTP (reduction to the pole) map. Qualitative interpretation were done by analysis of RTP map to determine the target of gold mineralization according to the characteristic of magnetic anomaly. Quantitative interpretation was done by combined between RTP map with IP data. Besides that, quantitative interpretation was done by 2D modelling by slicing RTP map using Oasis Montaj.The result of study showed two high anomalies can be interpreted as igneous intrusions with susceptibility 1 x 10-2 (SI-unit) and two low anomalies with susceptibility -3.7 x 10-5 (SI-unit) can be interpreted as the mineral quartz. Keywords: gold, minerals alteration, reduce to the pole, high sulphidation, oasis montaj.
Aplikasi metode magnetik untuk identifikasi sebaran bijih besi di Kabupaten Solok Sumatera Barat Aufi Maslihah Umamii; Tony Yulianto; Dadan Dani Wardhana
Youngster Physics Journal Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The aim of this research is to identify the subsurface structure in Solok West Sumatera by mapping the magnetic field. The measurement was made at 821 points in Solok, West Sumatra to obtain total magnetic field. Data processing was carried out by the daily variation correction and correction IGRF (International Geometric Reference Field) on magnetic field anomaly data to obtain the anomaly contour of total magnetic field.  Furthermore, the upward continuation process and reduction to pole process were applied to obtain the contour of local and regional anomaly. The result showed a pair of positive and negative closure which is then created a 2D model and 3D model using the software Geosoft Oasis Montaj. The 2D modeling showed that the subsurface structure with one of rock layer has a susceptibility of 0.185 and 0.196 cgs which is strongly suspected as iron ore mineral carrier rock. This rock layer is a unit of limestone derived from the Perem-age Barisan Formation. 3D modeling was used to calculate iron ore reserves in Solok, which is estimated to reach 1.414.579.375 ton.Keyword: magnetic field anomaly, susceptibility of rocks, iron ore, 2-D, 3-D.
Co-Authors Alifa Rusyda Arga Brahmantyo Aspia Prapitari Aufi Maslihah Umamii Dadan Dani Wardhana Dewi Wijayanti Dhana Hastuti Diny Agustina Rahayu Dita Destyanti Dwiyanto Joko Suprapto Eddy Z Gaffar Fajar Waskito Gatot Yulianto Gian Antariksa Hernowo Danusaputro Hiskia Anggit Maulana Iis Nur Jannah Iqbal Takodama Irfan Roismanto Irvan Ramadhan Kusworo Adi Laela Fitria M. Irtem Nurwidyanto Mars Widodo Muhammad Ulin Nuha ABA Nabil Bawahab Pertiwi Pertiwi Putri Nuriskianti Seftyand S Briyantara Siti Zulaikhah Sugeng Widada Tabitha Abid Ardaneswari Thomas Triadi Putranto, Thomas Triadi Titi Anggono Triana Triana Udi Harmoko Yusuf Dewantoro Herlambang