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Cover Depan Volume 30 No 2 Lina Handayani
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

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PEMETAAN PERMEABILITAS MAGNETIK PERMUKAAN BERBASIS CITRA SAR POLARIMETRIK DENGAN PENGUKURAN IN SITU DI LAPANGAN GUNUNG API Asep Saepuloh; Edo Kharisma Army; Zaki Hilman
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1080

Pemetaan parameter fisis berupa permeabilitas magnetik permukaan pada zona lemah yang terkait dengan aktivitas tektonik maupun vulkanik perlu dilakukan seiring dengan meningkatnya aktivitas kegempaan maupun kegunungapian dalam beberapa tahun terakhir. Pendeteksian keberadaan zona lemah umumnya dilakukan berdasarkan parameter kelurusan struktur geologi, reflektansi spektra, dan temperatur permukaan dengan memanfaatkan citra satelit optis. Makalah ini mengolah parameter yang berbeda berupa permeabilitas magnetik permukaan (μr), yaitu parameter fisis yang diturunkan dari citra satelit Polarimetric Synthetic Aperture Radar (PolSAR) dengan polarisasi penuh (quad-polarization) dan diverifikasi dengan pengukuran in situ. Parameter μr permukaan merupakan salah satu parameter yang digunakan untuk mengidentifikasi keberadaan zona lemah jalur fluida termal dari bawah sampai ke permukaan gunung api aktif. Aktivitas hidrotermal mengakibatkan degradasi nilai magnetik batuan di sekitarnya, sehingga ekstraksi nilai permeabilitas magnetik permukaan μr dianggap sangat efektif untuk mengidentifikasi jalur fluida termal di permukaan. Modifikasi pada metode dielectric from Polarimetric Synthetic Aperture Radar (dPSAR) menggunakan citra PolSAR dilakukan untuk mendapatkan parameter permeabilitas magnetik permukaan μr, yaitu kemampuan permukaan tanah dalam menerima respon medan magnet, disamping permitivitas dielektrik εr. Pengukuran μr in situ di lapangan menggunakan alat ukur Ferromaster Magnetic Permeability Meter dilakukan untuk menganalisis tingkat akurasi μr dari hasil inversi dPSAR. Berdasarkan uji validasi, nilai koefisien determinasi R2 yang diperoleh cukup tinggi, yaitu sekitar 0,73 antara μr hasil dPSAR dan pengukuran lapangan. Selain itu, hasil uji normalitas menunjukkan nilai residual antara keduanya terdistribusi normal. Hal ini mengindikasikan bahwa pendeteksian μr dengan metode dPSAR memiliki potensi untuk dikembangkan dan diaplikasikan lebih lanjut dalam pemetaan fisis geologi di permukaan. ABSTRACT - Surface Magnetic Permeability Mapping Using Sar Polarimetric and In Situ Measurement at Volcanic Field. Physical parameters mapping of surface magnetic permeability in weak zones associated with tectonic and volcanic activity is necessary due to the increasing seismic and volcanic activity in recent years. Typically, weak zones are detected from lineament related geological structures, reflectance spectra, and surface temperature visually on optical satellite images. This paper processed a different physical parameter of surface magnetic permeability (μr) derived from the Polarimetric Synthetic Aperture Radar (PolSAR) quad-polarization satellite image that was verified by field measurement. The μr was used to identify the weak zones connected to the fluid path of the subsurface hydrothermal system of an active volcano. The activity of hydrothermal fluids through the weak zones is responsible for the degradation of the magnetic permeability of the host rocks so that extracting μr is effective in identifying fluid path at the surface. A modification has been applied to the dielectric from Polarimetric Synthetic Aperture Radar (dPSAR) method using the PolSAR image by inverting the μr, in addition to εr parameters, that served as capability of the ground surface responds to the magnetic field. Measurement of μr in the field using Ferromaster Magnetic Permeability Meter was carried out to analyze the accuracy of the inverted μr from the dPSAR method. According to the validation test of μr that derived from dPSAR and field measurement, a high coefficient determination R2 of 0.73 was achieved. In addition, the normality test showed that residual values were distributed normally. Therefore, the μr inversion using dPSAR method has the potential to be developed and applied for advanced physical surface geological mapping.

BIOSTRATIGRAPHY ANALYSIS OF BARBATOS-1 EXPLORATION WELL IN TOMORI BLOCK, BANGGAI BASIN, EAST ARM OF SULAWESI Anis Kurniasih; Ennur Kusumawijaya; Ferdy Ferdy; Fahrudin Fahrudin; Reddy Setyawan
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 31, No 1 (2021)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2021.v31.1150

A biostratigraphic analysis was carried out on 60 samples taken from the Barbatos-1 Well, located within the Tomori Block, Banggai Tertiary Basin, East Arm of Sulawesi. The Barbatos-1 well was selected for this study because it is composed of rock sequences which are the main reservoir in the Tomori Block. Biostratigraphic analysis was conducted to determine the relative age and depositional environment of the sample. The age of the sample is determined based on the interval zone. The depositional environment is estimated basedon the ratio of plankton (P/B ratio) and fossil facies. The results revealed that the rock formations studied were deposited in the Miocene to Holocene age. The lowest layer is the Orbulina bilobata-Zone which was deposited at N10 – N12 (lower Middle Miocene) in the bathyal environment. The layer above is a biozonation of Globorotalia menardii, deposited at N12 – N14 (upper Middle Miocene) in a neritic environment. The next layer is the biozonation of Sphaeroidinella subdehiscens – Globigerina praebulloides which wasdeposited at N14 – N17 (Middle Miocene – Late Miocene) in the bathyal environment. The topmost layer is the biozonation of Orbulina universa – Globigerinoides immaturus which was deposited at N17 –N23 or Pliocene – Holocene in the bathyal environment. In the top two layers, there are fossil fragments that come from older rock layers (Early Tertiary).

SEISMIC HAZARD MICROZONATION BASED ON PROBABILITY SEISMIC HAZARD ANALYSIS IN BANDUNG BASIN Anggun Mayang Sari; Afnindar Fakhrurrozi
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1138

The geological and seismic-tectonic setting in the Bandung Basin area proliferates the seismicity risk. Thus, it is necessary to investigate the seismic hazards caused by the foremost seismic source that affects the ground motions in the bedrock. This research employed Probability Seismic Hazard Analysis (PSHA) method to determine the peak ground acceleration value. It considers the source of the earthquakes in the radius of 500 km with a return period of 2500 years. The analysis results showed that the Peak Ground Acceleration (PGA) in this region varies from 0.46 g to 0.70 g. It correlates with the magnitude and hypocentre of the dominant earthquake source of the study locations. The PGA value on the bedrock was used as an input to develop the seismic hazard microzonation map. It was composed using the Geographic Information System (GIS) to visualise the result. This research provides a scientific foundation for constructing residential buildings and infrastructure, particularly as earthquake loads in the building structure design calculations. ABSTRACT - Mikrozonasi Bahaya Seismik Berdasarkan Probability Seismic Hazard Analysis di Cekungan Bandung. Kondisi geologi dan seismik-tektonik di Cekungan Bandung meningkatkan risiko kegempaan di wilayah tersebut. Oleh karena itu, perlu dilakukan penelitian tentang bahaya seismik yang disebabkan oleh sumber-sumber gempa di sekitarnya yang mempengaruhi gelombang gempa di batuan dasar. Penelitian ini menggunakan metode Probability Seismic Hazard Analysis (PSHA) untuk menentukan nilai percepatan gelombang gempa di batuan dasar. Lebih lanjut penelitian ini menggunakan sumber gempa dalam radius 500 km dengan periode perulangan 2500 tahun. Hasil analisis menunjukkan bahwa Peak Ground Acceleration (PGA) di wilayah ini bervariasi dari 0,46 g hingga 0,70 g. Hal ini berkorelasi dengan magnitudo dan jarak hiposenter sumber gempa dominan terhadap lokasi penelitian. Nilai PGA di batuan dasar digunakan sebagai input data dalam pembuatan peta mikrozonasi bahaya seismik. Peta mikrozonasi bahaya seismik disusun dan divisualisasikan menggunakan Sistem Informasi Geografis (SIG). Luaran penelitian ini menghasilkan landasan ilmiah pada konstruksi bangunan tempat tinggal dan infrastruktur, khususnya sebagai pembebanan gempa dalam perhitungan desain struktur bangunan.

HYDROGEOLOGICAL IDENTIFICATION OF THE WELARAN WATERSHED KARANGSAMBUNG BASED ON DESCRIPTIVE-QUALITATIVE METHOD Nandian Mareta; Rachmat Fajar Lubis; Boy Yoseph CSS Syah Alam; Mohammad Sapari Dwi Hadian
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 31, No 1 (2021)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2021.v31.1144

The Welaran watershed in the Karangsambung area is hydrogeologically interesting because of its morphology, “U” shaped morphology like an amphitheater with the lithology consisting of tertiary to quarternary rocks. The character of Welaran river is an intermittent river that watery during the rainy season and dry during the dry season. This study intended to identify and determine the general hydrogeological condition of the Welaran watershed on a scale of 1:20.000. This study applies a descriptive-qualitative research method. The steps used are hydrogeological analysis and water balance. The results obtained indicate that the hydrogeological conditions of the area affect the character of the rivers in t

MIKROZONASI SEISMIK WILAYAH PADALARANG, KABUPATEN BANDUNG BARAT MENGGUNAKAN METODE HORIZONTAL TO VERTICAL SPECTRAL RATIO (HVSR) Gabrio Hikma Januarta; Tedi Yudistira; Adrin Tohari; Erlangga Ibrahim Fattah
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1087

Dalam kurun waktu lima tahun terakhir terjadi peningkatan aktivitas tektonik di wilayah selatan Pulau Jawa. Salah satu sesar aktif di wilayah Jawa Barat yaitu Sesar Cimandiri dan Sesar Lembang. Sesar Cimandiri berarah barat daya-timur laut, sedangkan Sesar Lembang berarah timur-barat. Melalui citra satelit DEM (Digital Elevation Model) pertemuan kedua sesar diduga berada di wilayah Padalarang, Kabupaten Bandung Barat. Keberadaan infrastruktur penghubung kota seperti jalan tol, rel kereta api serta permukiman penduduk yang padat menjadikan daerah tersebut merupakan daerah yang berpotensi mengalami kerusakaan saat terjadi gempa bumi. Dalam upaya mitigasi diperlukan studi mikrozonasi untuk mengetahui karakteristik tanah. Metode Horizontal to Vertical Spectral Ratio (HViSR) digunakan untuk mengestimasi nilai frekuensi dominan (f0) dan faktor amplifikasi (A0) daerah setempat dari data pengukuran mikrotremor. Dari 42 titik pengukuran didapatkan nilai frekuensi dominan (f0) yang terbagi kedalam dua zona yaitu 1,4–3,5 Hz dan 3,5–6 Hz. Sedangkan nilai faktor amplifikasi (A0) berkisar antara 2–8. Nilai indeks kerentanan seismik (Kg) berkisar antara 1–30, daerah dengan indeks kerentanan seismik (Kg) sedang hingga tinggi berada di Kecamatan Ngamprah dan Kecamatan Cisarua, sedangkan indeks kerentanan seismik (Kg) pada daerah Kecamatan Padalarang relatif rendah hingga sedang.ABSTRACT – Seismic Microzonation of Padalarang District, West Bandung Regency Using Horizontal to Vertical Spectral Ratio (HVSR) Method. In the last five years, tectonic activity has increased in the southern region of Java Island. One of the active faults in the West Java region is Cimandiri Fault and Lembang Fault. The Cimandiri Fault is southwest-northeast, while the Lembang Fault is east-west. Through DEM (Digital Elevation Model) satellite imagery, the intersection of the faults is probably located in Padalarang, West Bandung Regency. The existence of urban infrastructures such as toll roads, railways, and dense settlements makes this area have the potential to experience damage during an earthquake. Therefore, in mitigation efforts, microzonation studies are needed to determine the dynamic characteristics of soils in the area. Horizontal to Vertical Spectral Ratio (HVSR) method is used to estimate the value of dominant frequency (f0) and the amplification factor (A0) from microtremor measurement data. From 42 measurement points, the dominant frequency value (f0) is divided into two zones, 1.4–3.5 Hz and 3.5–6 Hz. The amplification factor (A0) ranges from 2–8. The value of the seismic vulnerability index (Kg) ranges from 1–30; areas with moderate to high seismic vulnerability indexes are in Ngamprah and Cisarua Districts, while the seismic vulnerability index in the Padalarang District is relatively low to moderate.

ANALISIS SPASI LUBANG BOR UNTUK MENGEVALUASI SUMBERDAYA TIMAH ALUVIAL DAN MINERAL IKUTANNYA DI PULAU BANGKA DENGAN GLOBAL ESTIMATION VARIANCE Raymond Kosher Sianturi; Mohamad Nur Heriawan; Syafrizal Syafrizal
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1115

Pulau Bangka merupakan daerah yang kaya akan mineralisasi timah yang dibawa oleh batuan granit. Selain kaya akan mineralisasi timah, ilmenite, rutile, anatase, zircon, monazite, dan xenotime juga hadir dalam batuan granit sebagai mineral aksesoris. Mineral-mineral ini juga terdapat dalam endapan sekunder timah aluvial dan disebut mineral ikutan timah (MIT). Optimasi spasi bor antara timah dan mineral ikutan timah dibutuhkan agar spasi tersebut dapat mewakili timah dan mineral ikutan timah. Metode yang digunakan pada penelitian ini adalah pendekatan geostatistik melalui metode Global Estimation Variance (GEV) untuk menghitung nilai relative error. Dari hasil penelitian didapatkan bahwa timah lebih homogen daripada mineral ikutan timah. Spasi optimum yang mewakili Sn (timah) dan mineral ikutan timah berdasarkan pada 8 (delapan) daerah di Pulau Bangka adalah 20 - 25 m untuk measured, 30 - 40 m untuk indicated, dan 40 - 50 m untuk inferred. ABSTRACT – Drill Hole Spacing Analysis for Evaluation of Tin and Associated Minerals Resources in Bangka Island Using Global Estimation Variance. Bangka Island is an area rich in granite rocks bearing tin mineralization. Besides that, ilmenite, rutile, anatase, zircon, monazite, and xenotime are also present in granite as mineral accessories. These minerals are also present in alluvial tin deposits and called as tin associated minerals. Optimization of drill hole spacing between tin and its associated minerals is indispensable so that these spacing can represent the spatial distribution of tin and its associated minerals. Global Estimation Variance (GEV) is used to calculate the relative error. This study showed that tin is more homogeneous than its associated minerals. The optimum spacings representing Sn (tin) and its associated minerals based on the case studies of eight sites at Bangka Islandare20–25m,30–40m,and40–50mfor obtaining the measured, indicated, and inferred resources, respectively.

AQUIFER MAPPING BASED ON STRATIGRAPHIC AND GEOELECTRICAL DATA ANALYSIS IN BEDOYO REGION, GUNUNG KIDUL REGENCY, YOGYAKARTA SPECIAL REGION Fatimah Fatimah; Al Hussein Flowers Rizqi; Waskita Murti Bambang Yudhana
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 31, No 1 (2021)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2021.v31.1137

The research area is a high karst area composed of carbonate rocks, where drought occurred almost every year. This study aimed to determine water availability in aquifer rocks by analyzing the surface geology and subsurface layers (geophysical method). We used the Schlumberger configuration in the geoelectric method at four locations in the study area to determine the resistivity value of the rocks beneath the surface. The results revealed that the site comprises tuff, crystalline limestone, layered limestone /chalky, and gravel to clay deposits. An aquifer was only found in Asem Lulang Village, which has a wedge layer with a thickness of 59 meters and thinned down to 5 meters towards the village of Ngalas Ombo. The value of the resistivity aquifer ranges from 0.18 to 9.18 ohm.m. The existence of that aquifer could indicate that the aquifer is only found in weakly undulated

PELINDIAN BIJIH NIKEL LATERIT KADAR RENDAH MENGGUNAKAN METODE ATMOSPHERIC ACID LEACHING DALAM MEDIA ASAM KLORIDA (HCL) Dian Permana; Rizky Kumalasari; Wahab Wahab; Musnajam Musnajam
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1097

Ekstraksi nikel laterit menggunakan metode hidrometalurgi lebih efisien dari segi konsumsi energi dengan lebih sedikit gas buang dibandingkan dengan metode pirometalurgi. Hal ini menyebabkan nikel laterit berkadar rendah dapat diekstraksi lebih banyak menggunakan metode hidrometalurgi. Salah satu metode hidrometalurgi dalam mengekstraksi nikel dari bijih nikel laterit adalah Atmospheric Acid Leaching. Penelitian ini bertujuan untuk memperoleh data persentase perolehan nikel, menentukan variabel yang paling berpengaruh dan menentukan kondisi optimum dalam proses pelindian. Pada penelitian ini dilakukan variasi pada faktor-faktor yang berpengaruh dalam proses leaching yakni temperatur, konsentrasi asam dan waktu pelindian. Analisis kandungan nikel hasil pelindian dilakukan menggunakan Atomic Adsorbtion Spectroscopy (AAS). Hasil penelitian menunjukkan bahwa persentase perolehan nikel terendah adalah 9,40% Ni dan tertinggi 75,76% Ni. Perhitungan ANOVA digunakan untuk menentukan faktor paling berpengaruh pada proses pelindian nikel laterit. Faktor yang paling berpengaruh dalam penelitian ini adalah temperatur (B), diikuti konsentrasi asam (A), waktu pelindian (C), interaksi konsentrasi-temperatur (AB), interaksi temperatur-waktu (BC), interaksi konsentrasi-waktu (AC) dan interaksi konsentrasi-temperatur-waktu (ABC). Kondisi optimum pelindian diperoleh pada kondisi temperatur 75°C, konsentrasi asam 2,9-3 Molar dalam waktu 69-70 menit dengan perolehan nikel >70%. ABSTRACT - Leaching of Low-Grade Nickel Laterite Ore Using Atmospheric Acid Leaching Method in Hydrochloric Acid. Nickel laterite extraction using the hydrometallurgical method is more efficient in energy consumption with less exhaust gas than the pyrometallurgical method. This method causes the extraction of low-grade nickel laterite ore using hydrometallurgy could be more effective. One of the hydrometallurgical methods to extract nickel from its ore is atmospheric acid leaching. This research aims to determine the percentage of nickel recovery through the leaching process, determine the most influenced leaching factor, and determine the optimum leaching condition. The main factors that influence the leaching process are temperature, acid concentration, and leaching time. Atomic adsorption spectroscopy was chosen to analyze the leaching solution. This research showed that the lowest recovery of nickel leaching was 9,40% of Ni, and the highest was 75,76% of Ni. Analysis of variance (ANOVA) was used to determine the most influenced factor of leaching. The most influenced factor was the temperature (B), followed by acid concentration (A), duration (C), the interaction of acid concentration-temperature (AB), the interaction of temperature-duration (BC), the interaction of acid concentration-duration (AC), and interaction of acid concentration-temperature-duration (ABC). The optimum leaching condition is at 75°C of temperature, 2,9-3 molar of acid concentration, in 69-70 minutes of duration, which has >70% of Ni recovery.

EVALUASI POTENSI LIKUIFAKSI DI WILAYAH CEKUNGAN BANDUNG BERDASARKAN METODE ANALISIS MULTI-SENSOR GELOMBANG PERMUKAAN Nur Amalia Dewi; Adrin Tohari; Imamal Muttaqien
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 30, No 2 (2020)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2020.v30.1131

Secara geologi, wilayah Cekungan Bandung tersusun oleh endapan danau Bandung purba yang terdiri atas lapisan lempung dengan sisipan lapisan pasir sehingga rentan terhadap likuifaksi akibat gempa bumi. Metode analisis multi-sensor gelombang permukaan (MASW) adalah salah satu metode geofisika yang menghasilkan model satu dimensi kecepatan gelombang geser (Vs) terhadap kedalaman. Makalah ini menyajikan hasil analisis potensi likuifaksi menggunakan data profil Vs di 5 lokasi yang tersebar di wilayah Cekungan Bandung. Data Vs diperoleh dengan menggunakan 24 geophone yang tersebar dengan spasi 4 meter di setiap lokasi penelitian. Hasil analisis data menggunakan metode MASW menghasilkan profil Vs dan Vs30 di setiap lokasi yang menunjukkan bahwa lapisan tanah di wilayah Cekungan Bandung dapat diklasifikasi dalam kelas situs E dan D. Sedangkan berdasarkan hasil analisis potensi likuifaksi menggunakan profil Vs, dengan mempertimbangkan percepatan tanah puncak yang dihasilkan oleh Sesar Lembang (Mw 6,5), mengindikasikan bahwa lapisan pasir di dalam endapan danau purba mempunyai potensi likuifaksi pada kedalaman dan ketebalan yang bervariasi. Lapisan pasir dengan nilai Vs < 175 m/detik yang menyebabkan potensi likuifaksi di daerah Bojongemas lebih tinggi dibandingkan dengan daerah lainnya. Hasil penelitian ini menunjukkan kesesuaian dengan hasil analisis likuifaksi berdasarkan metode uji penetrasi standar dari hasil penelitian terdahulu. ABSTRACT - The Evaluation of Liquefaction Potential in Bandung Basin Area Based on Multi-sensor Analysis of Surface Wave. The Bandung Basin region is composed of ancient Bandung lake sediment deposits consisting of thick clay layers intercalated with sand layers, which is vulnerable to liquefaction due to earthquakes. The multi-sensor surface wave (MASW) analysis method is a geophysical method that produces a one-dimensional model of shear wave velocity (Vs) against depth. . This paper presents the results of an analysis of the potential for liquefaction using Vs profile data at 5 locations spread across the Bandung Basin. using 24 geophones with 4-m spacing. The results of data analysis using the MASW method produce Vs and Vs30 profiles at each location which indicate that the soil layers in the Bandung Basin area can be classified into E and D site classes. Meanwhile, based on the results of the analysis of potential liquefaction using the Vs profile, taking into account the peak soil acceleration produced by the Lembang Fault (Mw 6.5), indicates that the sand layer in ancient lake sediment deposits has the potential for liquefaction at varying depths and thicknesses. Sand layer with a value of Vs <175 m / sec which causes the potential for liquefaction in the Bojongemas area is higher than in the other areas. The results of this study confirm liquefaction analysis based on the standard penetration test method from the previous study

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Location Kota adm. jakarta selatan, Dki jakarta INDONESIA

Abstract

Abstract

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Abstract

Abstract

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Abstract

Contact Name
Dedi Mulyadi

Contact Email
d3dimulya@gmail.com

Phone
-

Journal Mail Official
riset.geotek@gmail.com

Editorial Address
-

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA