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Jurnal Geominerba
Published by Pusat Pengembangan Sumber Daya Manusia Geologi, Mineral, dan Batubara
ISSN : 25801376     EISSN : 29632196     DOI : -
Core Subject : Science, Education, Engineering,
Earth & Planetary Sciences Education Engineering Other
The GEOMINERBA journal is published by the Center for Human Resources Development, Geology, Minerals and Coal which is published every June and December. Published publications related to the Development of Human Resources in the Field of Geology, Minerals and Coal.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 89 Documents
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KARAKTERISTIK GEOMORFOLOGI KAITANNYA DALAM PENENTUAN LOKASI RAWAN BENCANA LONGSOR DI CIKARANG DAN SEKITARNYA, KECAMATAN CISEWU, KABUPATEN GARUT, PROVINSI JAWA BARAT Sri Wahyuni; Emi Sukiyah
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 1 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i1.114

Abstract

The potential for landslide in Cisewu area is included in the medium-high landslide potential zone. Cisewu area has a hilly landscape composed of Quaternary volcanic material. The existence of geological structures such as joint and faults increases the risk of landslides, especially during the rainy season. This research aims to identify and analyze geomorphological characteristics and their relation in determining the location of landslide prone disasters. Research activities were conducted through a studio analysis using remote sensing methods with satellite imagery. The geomorphological aspects studied consist of slopes, drainage patterns, lithology and land use. Based on the results of interpretation, it is known that the research area has morphological characteristics of gentle to steep hills and drainage patterns influenced by geological structures. The research area is composed of volcanic products with a predominance of land use such as forests, plantations and fields, shrubs, rice fields and residential. Based on field observations, it is known that the research area has the potential for rockfall and translational landslide. Therefore, it is necessary to have good regional planning to minimize the impact of landslides in the future.
ANALISIS KARAKTERISTIK KEKASARAN PERMUKAAN BIDANG DISKONTINU PADA BATUAN HASIL ERUPSI GUNUNG SEMERU Diana Irmawati Pradani; Heru Dwiriawan Sutoyo; Agus Suhardono; Harsalim Aimunandar Jayaputra
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 1 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i1.126

Abstract

Rocks that form on the surface of the earth have varying properties and characteristics from the time they were formed to the deposition process. The results of the eruption of Mount Semeru that have been released will experience transportation and deposition and will become rock masses. Rock masses in nature have discontinuous or discontinuous properties caused by weak areas such as fractures, joints, fractures and fissures where the density, filling and orientation of the weak areas are not continuous. Discontinuous planes present in the rock mass will result in reduced shear strength of the rock. Roughness conditions in discontinuous planes can be quantified using Barton's empirical equation using the Joint Roughness Coefficient (JRC) parameter. Therefore, it is very important to know the rock mass characteristics that are affected by the shear strength of discontinuous planes in the eruption rock of Mount Semeru based on variations in shear roughness according to Barton and Choubey's criteria. Observation of discontinuous plane roughness conditions in rocks resulting from the eruption of Mount Semeru is qualified in order to obtain several rock shear strength parameters so that the undulation and cohesion values and friction angles in the surface of the discontinuous plane can be known. The results of this study showed that the JRC roughness value of discontinuous rock areas resulting from the eruption of Mount Semeru ranged from 10 – 20 and based on the reference given by ISRM (1981) it has a value in category V (smooth undulation).
IDENTIFIKASI LOGAM BERAT PADA AIR KOLONG DAN MIKROBA POTENSIAL UNTUK BIOREMEDIASI DI LAHAN PASCA PENAMBANGAN TIMAH asep kurnia
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 1 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i1.127

Abstract

The Bangka Belitung Islands Province is one of the largest tin producing regions in Indonesia. The purpose of this study was to identify the status of heavy metals in pit water and potential microbes for bioremediation in post-tin mining land. Heavy metals and Cr in water were detected at all locations (n ​​= 12), while Pb, Cd, Mn and Zn were detected at 4, 5, 2 and 3 locations respectively. The minimum concentration of these heavy metals was not detected except Cr metal which was 0.02 mg/l, while the maximum concentrations of Pb, Cd, Mn, Zn and Cr were 0.06; 0.07; 0.72; 0.29; and 0.03 mg/l. The results of isolation of soil samples from post-tin mining land on Bangka Island show that there are isolates of bacteria, fungi and Azotobacter which have the potential to remediate heavy metal polluted land. The number of bacterial isolates in the bulk soil and rhizosphere ranged from 1-2 isolates, while for fungi both in the bulk soil and in the rhizosphere ranged from 1-4 isolates. In the bulk soil sample, Azotobacter isolates were obtained. Total bacterial colonies in bulk soil were 106 cfu/g soil and 103 cfu/g soil for fungi, while in the rhizosphere it ranged between 105-106 and 102 cfu/g soil for bacteria and fungi respectively.
INVENTARISASI POTENSI LOGAM TANAH JARANG MENGGUNAKAN METODE GEOFISIKA DI DAERAH AIRBARA, KABUPATEN BANGKA SELATAN, KEPULAUAN BANGKA BELITUNG Silti Salinita; Asep Bahtiar Purnama; Andi Agus Nur; Yuyun Yuniardi
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 1 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i1.130

Abstract

The development of Rare Earth Elements (REE) based industries is still facing obstacles, even though rare earth elements have a very strategic role in the future. The purpose of this study is to determine the potential of sulfide-bearing rock resources from the modeling results as a basis for deciding LTJ prospect areas that can be further developed for the preparation of Mining Business Permit Areas. The research area is in Airbara Village, Airgegas District, South Bangka Regency, Bangka Belitung Islands Province. The method used is geoelectrical Induced Polarization (IP) measurements to determine the subsurface geological conditions. Based on direct field observations, the geomorphology of the study area is divided into three geomorphological units: lowland fluvial units, denudational plain units, and low intrusion hill units. The rock units in the study area are divided into three rock units from young to old: alluvium units, granite rock units, and alternating sandstone and clay units. Geoelectrical measurements of induced polarization were carried out on eight tracks located in 2 blocks of the study area, namely five tracks in the ABA block and three in the ABB block. Based on the distribution of resistivity values, the ABA05 line has the highest value, namely 33.1 Ωm to 2,398,833 Ωm. Tracks ABA01, ABA05, ABB07, and ABB08 have relatively moderate to high chargeability values. The potential for sulfide-bearing rock resources in the ABA block is estimated at 261,818 m3. If the rock density value is assumed to be 2.65 gr/cm3 or 2.65 tons/m3, then the total rock resource carrying sulfide minerals in this area is 693,818 tons. The potential for sulfide-bearing rock resources in the ABB block is estimated at 1,590,708 m3. If the rock density value is assumed to be 2.65 gr/cm3 or 2.65 tons/m3, then the total rock resource carrying sulfide minerals in this area is 4,215,376 tons. The actual rock resources taking sulfide minerals from the results of the 3D modeling of the IP and resistivity methods amount to 4,909,194 tons from an area of ​​1,296.2 Ha.
SEBARAN DAN PROSES GEOLOGI PEMBENTUKAN LAVA TUBE KESAKSAK DI BATUR UNESCO GLOBAL GEOPARK Ida Bagus Oka Agastya; Putu Diyan Diwyastra; Suryo Hespiantoro; Dewa Ariana
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 1 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i1.134

Abstract

Batur Volcano is an active stratovolcano located at Bali, in the area belongs to Batur Caldera as the the first UNESCO Global Geopark in Indonesia. Batur volcano produced lava, there are nine lava deposits resulting from the eruption of Mount Batur from 1849-1974. Many studies have been conducted to determine petrogenesis and the history of the eruption of Batur volcano, however, a more comprehensive study has never been carried out on the product of lava flows in the form of Lava Tubes/lava caves at Batur volcano. The research of Lava Tube focuses on the east side of Batur volcano where the 1888 lava flowed. Therefore, wecarried out field observation and analysis to interpret of the genesis Lava Tubes formation at Batur volcano. The Kesaksak Lava Tube at Batur Volcano was formed from the 1888 eruption of Batur Volcano, and the morphology forming tumuli which is referred to the tumulus cave lava. The lava flow that forms tumuli lava is caused by the rapid cooling of the lava surface then develops into a Lava Tube to form a lava flow further towards Lake Batur. The 1888 lava flow had a basalt composition with the character of the a'a lava. This supports the fact that the Lava Tube was not only formed in the pahoehoe lava flow. As one of the geosites in the Batur UNESCO Global Geopark area, the KesaksakLava Tube geosite has the potential to be developed as a geotourism object through the development of a geotrail that connects several geodiversities, biodiversity and cultural diversity in the Batur UNESCO Global Geopark area.
PENGARUH BIDANG DISKONTINUITAS TERHADAP KESTABILAN LERENG TAMBANG STUDI KASUS : LERENG HIGHWALL PIT’X’ PT. BERAU COAL Al Kautsar, Muhammad Ilham; Khoirullah, Nur; Hendarmawan, Hendarmawan; Umboro, Sindhu
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 2 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i2.135

Abstract

Berau Coal is a company that currently manages open-pit coal mines, requiring geotechnical analysis. The purpose of this research is to determine the stability of slopes with and without discontinuities to understand the influence of discontinuity planes on the slopes. The method used involves classifying rock strength based on the Geological Strength Index (Marinos, 2007). In the research area, the GSI classification for sandstone and claystone ranges from <42 to >42, including classes III, IV, V, and X. Kinematic analysis, limit equilibrium analysis, and stereogram analysis are also conducted to determine the factor of safety.Based on kinematic analysis to determine the type of landslide (Wyllie & Mah, 2004), there can be a wedge failure in the highwall area. Limit equilibrium analysis is performed under two conditions: with the presence of discontinuity planes, yielding a factor of safety (FS) value of 1.636, and without the presence of discontinuity planes, yielding an FS value of 1.365. Meanwhile, the stereogram analysis yields an FS value of 3.4. In this case study, the FS value is higher when there are discontinuity planes compared to the condition without discontinuity planes. This is because the existing discontinuity planes intersect the critical slope, causing a change in the sliding plane direction towards the discontinuity plane.
GEOMAP: INOVASI PELAYANAN PUBLIK UNTUK AKSES PETA-PETA KEGEOLOGIAN INDONESIA Agustin, Fitriani; Edy S, Verry; Gunanto, Dedy; Datanaya, Dimas
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 2 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i2.137

Abstract

Geomap is an online web application for free accessing geological related maps resulted from geological surveys and field investigations in The Centre for Geological Survey, Geological Agency, Ministry Energy and Mineral Resources. GeoMap can be represented as digital transformation in map services where traditionally map service performed in library as hard copy map sheets. Design thinking method was used to create GeoMap application which focused on problem solving and user orientation. This public service innovation is able to reduce the GeoMap Standard Operational Procedure (SOP) duration from 19 days to less than 2 hours.
NILAI KUALITAS MASSA BATUAN DENGAN METODE ROCK MASS RATING PADA AREA LOWWALL PIT X, PT. BUKIT ASAM TBK. SUMATERA SELATAN Dandy, Leonardus; Khoirullah, Nur; Hamdani, Ahmad Helman
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 2 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i2.139

Abstract

This research is located in the Muara Enim Formation which is included in the South Sumatera Basin and this formation is a coal-bearing formation in the study area. Rock Mass Rating classification is a rock mass classification method which can be used as an initial reference for engineering geology because it describes the rock mass characteristics which assosiated with slope stability. Mining at PT Bukit Asam, Tbk. using the open pit mining method so the control process is related to slope stability. The research was conducted on lowwall slope area which was designed to follow the slope of the rock layers that have the potential for plane slides so it is important to know the characteristics of the rock mass as an initial reference for the stability of a slope. The quality of the rock mass rating is determined by the rating of each parameter which is carried out by using the scanline method as a field calculation. Based on the rating of rock mass rating, the study area is divided into three rock mass classes, rock mass class II (good rock), rock mass class III (fair rock), and rock mass class IV (poor rock).
PENGARUH ELEVASI PERMUKAAN AIR TERHADAP PROBABILITAS KELONGSORAN DAN STABILITAS LERENG TIMBUNAN DI OPEN PIT "X" PT BERAU COAL, KALIMANTAN TIMUR Maulana, Muhamad Arief; Khoirullah, Nur; Ka'bah, Hanifan Cipta Muamar; Dwi Hadian, Mohamad Sapari
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 2 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

At the open pit mining, a place is needed for storing overburden material which is commonly referred as a disposal. In some cases, overburden material is stockpiled in void. Overburden material stockpiling activities require good planning. This research was conducted in the open pit "X" Site Sambarata PT. Berau Coal, East Kalimantan. The purpose of this study is to calculate the value of the safety factor of the slope, calculate the probability of failure and to analyze the effect of the water level on the slope stability. This study used the Bishop method with pseudostatic conditions and fully saturated groundwater conditions. From the results of this study it was found that the value of the slope safety factor in the study area ranged from 0.993 to 1.33 and the value of the probability of failure is 17.1 to 35.6%. The value of the factor of safety and the probability of failure is influenced by the geometry of the slope, distributed load, seismic load, and the height of the water level where the higher the water level in the pit, the value of the slope safety factor is higher and the value of the probability of failure is lower.
STUDI FASIES AIR TANAH DI KAMPUS LAPANGAN PPSDM GEOMINERBA DAERAH CIPATAT, KABUPATEN BANDUNG BARAT, PROVINSI JAWA BARAT Setiawan, Iwan Fahlevi; Rohaendi, Nendi; Wahyudi, Wahyudi
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 8 No 2 (2023): Jurnal Geominerba - 2023
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58522/ppsdm22.v8i2.141

Abstract

PPSDM Geominerba Field Campus is a center for training practice activities located in Cipatat, Padalarang District, Kab. Bandung Barat. The existence of groundwater plays an important role in supporting training practices and daily needs for the surrounding community. The aim of this paper is to determine the facies of groundwater based on data on physical and chemical properties. Samples were taken from 5 spring locations to be analyzed in the laboratory and re-analyzed using the trilinear piper diagram. The acidity level of spring water is < 7, with values ​​varying between 4.99 – 6.31, Total Dissolved Solid (TDS) is in the range of 0.12 – 0.37 mg/l, Electrical Conductivity value (EC) between 0.26 – 0.74 µS. Based on the plotting results from the piper diagram, it was found that the research area could be grouped into 2 groundwater facies: Facies Ca, HCO3- and Facies No Dominant, HCO3-

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