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Pemodelan Sebaran Sistem Hidrotermal dan Identifikasi Jenis Batuannya dengan Metode CSAMT (Studi Kasus Gunungapi Ungaran) Hadi, Arif Ismul; Brotopuspito, Kirbani Sri; Wahyudi, Wahyudi
Jurnal Fisika FLUX Vol 6, No 1 (2009): Jurnal Fisika Flux Edisi Februari 2009
Publisher : Lambung Mangkurat University Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/flux.v6i1.3048

The investigation of the hydrothermal system distribution andidentification of its rock type has been done by CSAMT method at Ungaran Volcano area. The acquisition data has been done around 750 m x 100 m area with 4 lines at N750E direction. Sounding site distanced 250 m, whereas the data was measured by Stratagem model 26716-01 Rev.D. Processing of the data wasstarted by 1-D inversion of Robust method. The 1-D results were then used as the input of MT2D software. The results showed that subsurface resistivity were 8.6 to 46.4 Î©m estimated as hydrothermal system, 55.8 to 102.6 Î©m estimated as aquifer zone or permeable saturated zone, 145.3 to 495.7 Î©mÂ stimated as pra-caldera rock associated with vapor dominated zone, and 1420.5 to 15.083 Î©m estimated as lava pile associated with basaltic and andesitic rock. The most prospective hydrothermal system area existed at all along line 4 on 30 to 140 m depth.

Gliding and Quasi-harmonic Tremor Behaviour of Raung Volcano: November 2014 Crisis Period Case Study Ipmawan, Vico Luthfi; Brotopuspito, Kirbani Sri; Triastuty, Hetty
Indonesian Journal on Geoscience Vol 5, No 1 (2018)
Publisher : Geological Agency

DOI: 10.17014/ijog.5.1.13-21The seismic activity of Raung Volcano was raised on 11 November 2014. As many as 1709 tremors were recorded followed by continuous tremors appearing in late November 2014. Quasi-harmonic and gliding tremors appeared in a spectrogram on 12 November 2014. The quasi-harmonic tremors refer to tremors that have no fully harmonic form in spectrum. The gliding harmonic tremors refer to harmonic tremors that have frequency jumps with either positive or negative increment. After signal restitution processing, the Maximum Entropy Spectral Analysis (MESA) method was applied in Raung recordings resulting the spectrum and the spectrogram of tremors. The quasi-harmonic tremors have the monotonic spectrum in its head and centre segment, and the harmonic one in its tails. There are twenty-four spectrums that show frequency changes between the monotonic and harmonic. The similarity between the fundamental frequency range of the monotonic and harmonic ones suggests that both signals are excited from a common resonator. The alternating of monotonic and harmonic respectively over this period is qualitatively similar with Julian’s synthetic time series about the nonlinear oscillator model. It is suggested that Raung Volcano magma pressure is sizeable to make a chaotic vibration. A pressure increasing in Raung magmatic conduit causes the increasing of P-wave velocity and makes a positive gliding frequency.

THE INVESTIGATION ORE DEPOSIT OF RADIOISOTOPE ELEMENT WITHIN THE MINING SUBSTANCE IN THE WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

These research inspect the distribution and the accumulation shape of ore depo-sit anomaly of radioisotope element within the mining substance at Sub-district of Amara-si and East â€“ Middle Kupang West Timor Island. The aims of the research: 1) to localize the distribution wide of radioisotope element within the mining substance, 2) to stake out the target reconstruction or shape of accumulation anomaly ore deposit of radioisotope e-lement within the mining substance, 3) to decide counts range of nuclear radiation and thermal counts in the center region of radioisotope source in the West Timor Island. The methods of research consist of: observation, survey, modeling, analysis, and interpretation. Procedures of research including: 1) to observe for determination the po-tential region and grid plot, 2) to calibrate equipment, 3) to measure background count in around of survey location, 4) to measure nuclear radiation and thermal count in the sur-vey location, 5) to correct field count with background count, 6) two and three dimensional characteristic curve of radiation and thermal count plot, contour, contour slice, and distri-bution profile curve of ore deposit anomaly of radioisotope in the mining substance al-so plot, 7) to determine the depth of ore deposit of radioisotope element within the mi-ning substance and radiation power, 8) to calculate radiation intensity for modeling of tar-get reconstruction, 9) to stake out modeling and target reconstruction of ore deposit of ra-dioisotope in the mining substance, 10) interpretation and conclusion. The results of the research: radiation power to determine radiation intensity is 1183911,452 w. Based on characteristic curve, contour, profile curve, and modeling of o-re deposit anomaly (target reconstruction) of radioisotope element within the mining subs-tance, can be proposed that the wide of ore deposit distribution of radioisotope element in rock mineral 1.5 kilometers x 2.0 kilometers, and the wide of ore deposit center region 200 meters x 300 meters. The shape of ore deposit anomaly of radioisotope element wi-thin the mining substance resemble of oval ball vertically with diameters Â± 54 meters hori-zontal, and Â± 100 meters vertical on the average depth 22 meters, and the shape on abo-ve surface is dented. The range thermal and radiation counts of radioisotope element in the mining substance revolve between 20.3o C to 50.7o C and 9 counts per minute to 117 counts per minute.

ANALYSIS THE KINDS AND COMPOSITIONS OF RADIOISOTOPE ELEMENT WITHIN THE MINE SAMPLES BY MCA SPECTROMETRY IN WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

The problems analyzed in the research are the kinds and compositions of radioisotope within the mining substance in the West Timor Island. The purposes of the research : 1) to investigate and determine the kinds of radioisotope elements in the mining substance, 2) to determine the radiation energy, counts, half life, and percentage of radioisotope element deposit within the mining substance. The methods of the research include observation, survey, sampling, spectrometry, analysis, and interpretation. On the observation, survey, and sampling steps, the 50 samples taken are distributed at the survey location. Those samples are analyzed with the several steps including: to dry the samples, to refine, to burn until temperature 800o C, to stabilize and dry again. All samples are analyzed with spectrometry system on the multi-channel analyzer (MCA) that can separate element of the samples. The results obtained are that the kinds of radioisotope element deposit within the samples of mining substance consist of Actinium series component and other association elements, also energy radiation, counts, half life, and percentage of radioisotope element deposit within the mining substance respectively revolved between 26.6 keV to 1562.3 keV,1 cps to 24867cps, 3.16 minutes to 1.405 x 1010 years, and 0.19% to 99.00%. The main elements on Actinium series within the samples of mining substance comprise of U-235, Th-231, Pa-231, Th-227, Bi-211, and Rn-219, and other isotopes Bi-212, Th-232, Pb-212, Pa-234, Ac-228, Ra-226, and Pb-214, with energy radiation, counts, half life, and percentage of radioisotope element deposit respectively revolved between 26.6 keV to 426.9 keV, 1 cps to 24867 cps, 7.038 x 108 years to 1.405 x 1010 years, and 1.0% to 18.7 %. The association elements consist of Am-241, Cs-134, Cs-136, Cs-138, Ce-141, Ce-144, Ba-133, Ba-140, Cd-109, Se-75, Te-132, Co-57, Mo-99, Fe-59, Kr-85, Kr-88, Kr-89, Sb-122, Sb-124, Sb-125, Xe-125, Xe-131m, Xe-133m, Xe-135, Xe-135m, Xe-138, I-124, I-125, I-130, I-131, I-132, I-134, I135, Br-82, Y-91m, Y-92, Y-93, Y-94, W-187, Sr-91, Sr-92, Sr-93, Zr-97, Rb-89, Rh-105, Ni-65, Sn-133, Be-7, Nb-94, Nb-96, Nb-97, Ag-110m, As,76, Cr-51, Eu-152, and Tc-96.

STUDY PENDAHULUAN SESAR OPAK DENGAN METODE GRAVITY (STUDY KASUS DAERAH SEKITAR KECAMATAN PLERET BANTUL) Nurwidyanto, M Irham; Brotopuspito, Kirbani Sri; Waluyo, Waluyo; Sismanto, Sismanto
BERKALA FISIKA Vol 14, No 1 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (540.42 KB)

The reconnaissance research to predict the position and the type of Opak Fault in surrounding subdistrict Pleret area was carryout by gravity method. It done by measured the intensity of gravity field. The measurement was done in five linesÂ cross the Opak Fault which indicated in the geological map. The intensity of gravity fieldÂ in the surround of subdistrict Pleret area are measured by la-coste RombergÂ Gravitymeter,Â the latitude are measured by GPS Trimble, and the position are measured by GPS Garmin III Plus. The measurement was done in five lines which separated abaut 2,5 km and about 20 km in length. The distance of observations are about 0,5 km to 1 km. The data which be collected are reduction by drift and tidal correction, free air correction, bouger correction and terrain correction. The corrected data are made bouger anomaly contour. The result of this research by kwalitative interpretation are estimated thatÂ the location of Opak Fault in the eastern part of the position of Opak Fault which indicated in the geological map. The type of opak fault are normal fault, because can be detected by gravity method. Key words : Opak Fault, Pleret, gravity method.Â

PEMETAAN PERCEPATAN GETARAN TANAH MAKSIMUM MENGGUNAKAN PENDEKATAN PROBABILISTIC SEISMIC HAZARD ANALYSIS (PSHA) DI KABUPATEN KEPAHIANG PROVINSI BENGKULU Hadi, Arif Ismul; Brotopuspito, Kirbani Sri
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015
Publisher : BERKALA FISIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (639.376 KB)

This study aims to analyze and map the peak ground acceleration using the approach of Probabilistic Seismic Hazard Analysis (PSHA) in the area. Earthquake catalog data obtained from BMKG, ISC and USGS began in 1914 until 2014. Declustering process using ZMAP ver.6 software. Identification and modeling of the seismic source uses three models of seismic sources: (1) to subduction earthquake source, (2) the source of the earthquake fault and (3) the source of the quake background. Parameters a-value and b-value is obtained by the Gutenberg-Richter recurrence law and maximum likelihood method, whereas the determination of the attenuation function and logic tree refers to the Revision Team of Indonesia Earthquake 2010. Peak ground acceleration values obtained using USGS-PSHA-07 software. The results showed that the value of the peak ground acceleration in the Kepahiang District for probability exceeded 10% and 2% in the 50 year design life of the building is 0.15 â€“ 0.8 g and 0.25 â€“ 1.3 g. Areas that are the red zone is the Ujan Mas Sub-district, Kepahiang Sub-district, Tebat Karai Sub-district, Seberang Musi Sub-district and Bermani Ilir Sub-district, while the regions are relatively safe from the red zone is the Merigi Sub-district, Kabawetan Sub-district and Muara Kemumu Sub-district. Red zone is an area adjacent to the Sumatran Fault of Musi Segment. Keywords: peak ground acceleration, PSHA, red zone and Sumatran Fault of Musi Segment.

THE INVESTIGATION ORE DEPOSIT OF RADIOISOTOPE ELEMENT WITHIN THE MINING SUBSTANCE IN THE WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 01 Agustus 2007
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.1977

These research inspect the distribution and the accumulation shape of ore depo-sit anomaly of radioisotope element within the mining substance at Sub-district of Amara-si and East â€“ Middle Kupang West Timor Island. The aims of the research: 1) to localize the distribution wide of radioisotope element within the mining substance, 2) to stake out the target reconstruction or shape of accumulation anomaly ore deposit of radioisotope e-lement within the mining substance, 3) to decide counts range of nuclear radiation and thermal counts in the center region of radioisotope source in the West Timor Island. The methods of research consist of: observation, survey, modeling, analysis, and interpretation. Procedures of research including: 1) to observe for determination the po-tential region and grid plot, 2) to calibrate equipment, 3) to measure background count in around of survey location, 4) to measure nuclear radiation and thermal count in the sur-vey location, 5) to correct field count with background count, 6) two and three dimensional characteristic curve of radiation and thermal count plot, contour, contour slice, and distri-bution profile curve of ore deposit anomaly of radioisotope in the mining substance al-so plot, 7) to determine the depth of ore deposit of radioisotope element within the mi-ning substance and radiation power, 8) to calculate radiation intensity for modeling of tar-get reconstruction, 9) to stake out modeling and target reconstruction of ore deposit of ra-dioisotope in the mining substance, 10) interpretation and conclusion. The results of the research: radiation power to determine radiation intensity is 1183911,452 w. Based on characteristic curve, contour, profile curve, and modeling of o-re deposit anomaly (target reconstruction) of radioisotope element within the mining subs-tance, can be proposed that the wide of ore deposit distribution of radioisotope element in rock mineral 1.5 kilometers x 2.0 kilometers, and the wide of ore deposit center region 200 meters x 300 meters. The shape of ore deposit anomaly of radioisotope element wi-thin the mining substance resemble of oval ball vertically with diameters Â± 54 meters hori-zontal, and Â± 100 meters vertical on the average depth 22 meters, and the shape on abo-ve surface is dented. The range thermal and radiation counts of radioisotope element in the mining substance revolve between 20.3o C to 50.7o C and 9 counts per minute to 117 counts per minute.

ANALYSIS THE KINDS AND COMPOSITIONS OF RADIOISOTOPE ELEMENT WITHIN THE MINE SAMPLES BY MCA SPECTROMETRY IN WEST TIMOR ISLAND NUSA TENGGARA TIMUR Pasangka, Bartholomeus; -, Prayoto; Brotopuspito, Kirbani Sri; -, Waluyo
JURNAL TEKNOLOGI TECHNOSCIENTIA Academia Ista Vol 12 No 02 Februari 2008
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34151/technoscientia.v0i0.2002

The problems analyzed in the research are the kinds and compositions of radioisotope within the mining substance in the West Timor Island. The purposes of the research : 1) to investigate and determine the kinds of radioisotope elements in the mining substance, 2) to determine the radiation energy, counts, half life, and percentage of radioisotope element deposit within the mining substance. The methods of the research include observation, survey, sampling, spectrometry, analysis, and interpretation. On the observation, survey, and sampling steps, the 50 samples taken are distributed at the survey location. Those samples are analyzed with the several steps including: to dry the samples, to refine, to burn until temperature 800o C, to stabilize and dry again. All samples are analyzed with spectrometry system on the multi-channel analyzer (MCA) that can separate element of the samples. The results obtained are that the kinds of radioisotope element deposit within the samples of mining substance consist of Actinium series component and other association elements, also energy radiation, counts, half life, and percentage of radioisotope element deposit within the mining substance respectively revolved between 26.6 keV to 1562.3 keV,1 cps to 24867cps, 3.16 minutes to 1.405 x 1010 years, and 0.19% to 99.00%. The main elements on Actinium series within the samples of mining substance comprise of U-235, Th-231, Pa-231, Th-227, Bi-211, and Rn-219, and other isotopes Bi-212, Th-232, Pb-212, Pa-234, Ac-228, Ra-226, and Pb-214, with energy radiation, counts, half life, and percentage of radioisotope element deposit respectively revolved between 26.6 keV to 426.9 keV, 1 cps to 24867 cps, 7.038 x 108 years to 1.405 x 1010 years, and 1.0% to 18.7 %. The association elements consist of Am-241, Cs-134, Cs-136, Cs-138, Ce-141, Ce-144, Ba-133, Ba-140, Cd-109, Se-75, Te-132, Co-57, Mo-99, Fe-59, Kr-85, Kr-88, Kr-89, Sb-122, Sb-124, Sb-125, Xe-125, Xe-131m, Xe-133m, Xe-135, Xe-135m, Xe-138, I-124, I-125, I-130, I-131, I-132, I-134, I135, Br-82, Y-91m, Y-92, Y-93, Y-94, W-187, Sr-91, Sr-92, Sr-93, Zr-97, Rb-89, Rh-105, Ni-65, Sn-133, Be-7, Nb-94, Nb-96, Nb-97, Ag-110m, As,76, Cr-51, Eu-152, and Tc-96.

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