cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota bandung,
Jawa barat
INDONESIA
Buletin Sumber Daya Geologi
Published by Pusat Sumber Daya Mineral Batubara dan Panas Bumi
ISSN : 19075367     EISSN : 25801023     DOI : -
Core Subject : Science, Education, Social, Engineering,
Education Energy Engineering Environmental Science
uletin Sumber Daya Geologi merupakan Makalah berkala ilmiah terakreditasi LIPI bidang mineral, energi fosil, dan panas bumi. Makalah ini terbit tiga nomor dalam satu tahun pada bulan Mei, Agustus dan November. Pada Tahun 2010, Buletin Sumber Daya Geologi mendapat Akreditasi B sebagai majalah Berkala Ilmiah, kemudian akreditasi ulang Tahun 2012, dan akreditasi terbaru di Tahun 2015 untuk tiga tahun kedepan dengan nomor ISSN (print) : 1907-5367. Tahun 2017 Buletin Sumber Daya Geologi mendapatkan nomor eISSN : 2580 - 1023 untuk versi onlinenya.
Arjuna Subject : -
Articles 751 Documents
 71   72   73   74   75 
PROSPEK MIGAS PADA CEKUNGAN JAWA TIMUR DENGAN PENGAMATAN METODE GAYABERAT Panjaitan, Saultan
Buletin Sumber Daya Geologi Vol 5 No 3 (2010): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v5i3.266

Abstract

Anomali Bouguer  didaerah Cekungan Jawa Timur  dapat di kelompokkan kedalam  (3)   tiga bagian yaitu: a. Anomali gayaberat  tinggi dari kisaran   20  mGal  hingga  60  mGal  membentuk tinggian   batugamping.  b. Anomali gayaberat  sedang dari kisaran  0 mGal hingga 20 mGal dibentuk oleh cekungan batuan sedimen.   c. Anomali gayaberat rendah dari kisaran 0 mGal hingga – 50 mGal dibentuk oleh rendahan  Zona Kendeng. Tinggian antiklin yang terkait dengan migas  terbentuk pada dua  jalur yaitu Zona Rembang di utara dan Zona Randublatung di selatan.  Anomali   5 mGal  hingga  37 mGal pada anomali sisa dianggap prospek sedangkan   < dari  5 mGal kurang prospek.  Batuan reservoir terbentuk   pada rapat massa  2,7 gr/cm³ dari batugamping Formasi Kujung bagian atas, Formasi Ngimbang bagian atas dan  batupasir Ngrayong bagian atas hingga Formasi Ledok dan Formasi Lidah. Ketebalan batuan reservoir terbentuk antara   ± 800 hingga 1100 meter  pada kedalaman ± 1500   hingga 2500 meter.  Batuan induk terbentuk pada anomali  0 mGal hingga – 35 mGal di Cekungan Lamongan dan Rembang dari serpih   terestrial  Formasi Ngimbang Bawah, Kujung Bawah dan Formasi Tawun.  Batuan alas  diperkirakan disusun oleh Kompleks Melange terdiri atas batuan metamorf dan batuan beku mempunyai rapat massa  2,9 gr/cm³ dengan  kedalaman yang bervariasi akibat pematahan bongkah pada batuan alas.
PENGARUH SESAR NORMAL CEUNOHOT TERHADAP LANDAIAN TEMPERATUR SUMUR JBO-1 DAN JBO-2 DI LAPANGAN PANAS BUMI JABOI, SABANG, NANGGROE ACEH DARUSSALAM Soetoyo, Soetoyo; Widodo, Sri
Buletin Sumber Daya Geologi Vol 5 No 3 (2010): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v5i3.267

Abstract

Sesar Ceunohot yang teridentifikasi dari survei geologi dan geofiska, memotong/melintang daerah prospek panas bumi Jaboi di antara Gunung Lemo Matee dan Gunung Semeureuguh dengan arah baratdaya – timurlaut. Sesar ini diduga menjadi media naiknya fluida panas bumi dari reservoir menuju permukaan. Hal ini didukung dengan data pengeboran sumur landaian suhu JBO-1 dan JBO-2.Dalam sumur JBO-1 didapati hilang sirkulasi sebesar 55,5 lpm di kedalaman 90,64 sampai 90,84 m dan sebesar 10 lpm pada kedalaman 172 sampai 238 m, dengan landaian suhu sekitar 21 °C. Dalam sumur JBO-2 didapati hilang sirkulasi dengan kisaran 30 sampai 350 lpm di zona kedalaman 21 sampai 43,15 m dan sebesar 30 lpm pada kedalaman 141 sampai 142 m, dengan landaian suhu sekitar 17 °C.Tingginya temperatur gradient di sumur JBO-1 disesbbkan karena letaknya berada lebih dekat dengan zona rekahan sesar Ceunohot.
KARAKTERISTIK MINERAL LEMPUNG HASIL UBAHAN PADA SUMUR LW-1 DAN LW-2 DENGAN MENGGUNAKAN METODE DIFRAKSI SINAR-X PADA SISTEM PANAS BUMI GUNUNG LAWU: THE CHARACTERISTICS OF CLAY MINERAL ALTERATION FROM WELLS LW-1 AND LW-2 USING X-RAY DIFFRACTION METHOD IN THE MOUNT LAWU GEOTHERMAL SYSTEM Permana, S.T., M.T, Lano Adhitya; Sastrawijaya, Candra Widya; Hermawan, Dudi
Buletin Sumber Daya Geologi Vol 15 No 1 (2020): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v15i1.293

Abstract

The LW-1 and LW-2 geothermal wells are located in the depression zone between Mount Lawu and Mount Jabolorangan contain rocks that are hydrothermally alterated as indicated by the presence of alteration minerals that are classified as argillic to advanced argillic alteration. To determine the character of the altered minerals that were formed, especially the presence of clay minerals in LW-1 and LW-2 wells, a study of clay minerals is required using the X-Ray Diffraction approach. This study aims to determine the presence and characteristics of clay minerals in LW-1 and LW-2 also their correlation to the formation of a geothermal system in the Gunung Lawu area. The analysis and interpretation using XRD method in LW-1 and LW-2 wells shows that within the temperature increases the crystal shape of the clay minerals becomes more perfect which is represented by a smaller degree of crystallinity. Whereas the effect of grain size on the XRD pattern shows that the crystallinity of the clay minerals tend to decrease with increasing grain size. The altered clay minerals in LW-1 and LW-2 wells consist of smectite, illite, kaolinite and halloysite which can be acted as caprock in the Mount Lawu geothermal system.
PENGARUH NILAI CADANGAN PANAS BUMI TERHADAP KELAYAKAN PROYEK PENGEBORAN SUMUR EKSPLORASI OLEH PEMERINTAH BERDASARKAN PERBANDINGAN BIAYA DAN PENDAPATAN NEGARA: STUDI KASUS PROYEK NAGE, KABUPATEN NGADA, PROVINSI NUSA TENGGARA TIMUR: GEOTHERMAL RESOURCES EFFECTS ON PROJECT FEASIBILITY OF EXPLORATION WELL DRILLING BY THE GOVERNMENT BASED ON STATE COST AND REVENUE COMPARISON: A STUDY CASE OF NAGE PROJECT, NGADA REGENCY, EAST NUSA TENGGARA PROVINCE Evi Octavia; Sinulingga, Iman K; Husin Setia Nugraha; Fitri Purnamasari Liveta
Buletin Sumber Daya Geologi Vol 18 No 2 (2023): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v18i2.361

Abstract

The three main problems in Indonesia's geothermal development include selling price issues, working area tenders, and high upstream risks. These three will lead to one condition: geothermal projects cannot reach their economic level. The Government of Indonesia (GoI) has initiated the Government Drilling Program to reduce high upstream risks. In addition to the main objective of reducing geothermal upstream risk, this program can indirectly generate state revenue. It is necessary to evaluate the program not only from a technical perspective but also from a financial point of view. Stakeholders could consider the evaluation results when making decisions about the continuity of this program. This financial evaluation will assess whether the costs incurred as an investment generate the desired rate of return. In this case, it compares the costs incurred by the GoI from the state budget (APBN) and the revenues obtained by the GoI from tax and non-tax. The Indonesiaost ratio (BCR) value is a parameter indicator of its assessment. The study results show that the BCR value of the government's cash flow from the Nage Project is 2.1. This value indicates that every rupiah of costs incurred by the government in the project will generate more than twice as much state revenue. Using the rate of return parameter, namely the Internal rate of Return (IRR), this project produces a value almost double the rate of return determined if the project uses the state budget. In addition, the Nage Project's valuation based on the Net Present Value (NPV) shows a positive value (NPV> 0). Based on those three indicators, the Government Drilling Program, especially the Nage Project, is feasible to continue. However, when viewed from the developer's cash flow perspective, the Nage Project of 30 MWe is still not attractive to private developers in Indonesia because the value of the project feasibility indicator is negative or –the rate of return is still below the desired value (IRR < MARR - Minimum Attractive Rate of Return ). The project is still feasible to be continued by developers from state-owned enterprises (SOE), which usually have lower MARR values. In addition, SOE has privileges in loan and depreciation parameters compared to private developers.
DELINEASI NILAI RESISTIVITAS DI LAPANGAN PANAS BUMI TAMBANG SAWAH MENGGUNAKAN METODE MAGNETOTELLURIK Al Ansory, Andre Rahmat; Hana Raihana; Pritama, Vinki Loverly; Saputri, Welly; Maghribi, Faritz Bagda; Muchammad Farid; Arif Ismul Hadi; Halauddin; Harlianto, Budi; Sugianto, Nanang
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v18i3.386

Abstract

The subsurface structure of the geothermal field in Desa Tambang Sawah has been mapped. This research aims to delineate the resistivity values in the area of Tambang Sawah Village, Lebong Regency, Bengkulu Province based on magnetotelluric measurements which can later identify low, medium, and high resistivity values to interpret geothermal in the research area. The magnetotelluric (MT) method with electrical and magnetic sensors is used to collect data in the field. There are two electrical sensors in horizontal direction (Ex, Ey) and three magnetic sensors in horizontal direction. (Hx, Hy) and vertical (Hz). The results obtained from this study are that resistivity values of 20-50 ohm.m are considered as reservoirs, while resistivity of 0.26-0.8 ohm.m is considered as caprock, and resistivity greater than 300 ohm.m is considered as hot rock.
SUMBER DAYA DAN KARAKTERISTIK ENDAPAN PASIR BESI DI CIHERAS, KABUPATEN TASIKMALAYA: RESOURCES AND CHARACTERISTICS OF IRON SAND DEPOSITS IN CIHERAS, TASIKMALAYA DISTRICT Teuku Ishlah; Suwahyadi; Dwi Nugroho Sunuhadi
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v18i3.402

Abstract

Iron is a metal commodity that is widely used in human civilization, and is now used as a raw material for making steel and a mixture of raw materials for cement. Therefore, research activities on iron sand deposits are still needed, especially in ex-mining areas that are interesting for re-examination, because increase of metal price, so decrease the cut off grade for iron sand concentrate mining and the possibility of the presence of other high value minerals. The research location is located in Ciheras Village, Cipatujah District, including Block Ciheras-1, Block Ciheras-2, and Block Cikalong, Cikadu Village, Cikalong District, Tasikmalaya Regency, West Java Province. The aim of this research is to determine the availability, quality and estimation of inferred resources for iron sand deposits. The research used geological mapping methods, and sampling using a hand auger at a distance of 400 meters between drilling points in the direction of the base line and 40 meters in the direction of the cross line. A total of 71 points were drilled to a depth of between 2.0 meters to 4.0 meters and samples of iron sand were taken for laboratory analysis including specific gravity (BJ), magnetic percentage (MD), sieve/grain fraction analysis, grain mineralogy analysis, XRF , AAS, and colorimetry. The calculation results for the iron sand resources of the Ciheras-1 Block are 257,138 tonnes, the Ciheras-2 Block is 512,199 tonnes, and the Cikalong Block is 491,970 tonnes, bringing the total to 1,261,308 tonnes. Average percentage of magnetism in the Ciheras-1 Block; 24.02%, Ciheras-2 Block; 14.7%, and Cikalong Block; 8.01%. These iron sand deposits come from rocks and ash from volcanic eruptions which are transported by river water to estuaries and deposited on beaches. High economic value elements in the form of Titanium and Vanadium in beach sand deposits in the research area whose levels and occurrence are comparable to the element Fe.
DERAJAT LATERITISASI DAN PENGAYAAN UNSUR FE-NI-CO PADA BATUAN HARSBURGIT DI PULAU SEBUKU, KALIMANTAN SELATAN: DEGREE OF LATERITIZATION AND ENRICHMENT OF FE-NI-CO ELEMENTS IN HARSBURGITE ROCKS ON SEBUKU ISLAND, SOUTH KALIMANTAN Fasya Zahra Fauziyyah Ramdani; Putri Ramadhani, Ayumi Hana; Cahyadi, Andhi; Ernowo; Widodo, Wahyu
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v18i3.411

Abstract

The tropical climate in Indonesia causes a high level of chemical weathering or lateritization of ultramafic rocks which results in the enrichment of economic elements such as Fe, Ni and Co. These elements accumulate in the limonite and saprolite zones. This research was conducted on Sebuku Island which composed of ultramafic rocks, especially harzburgite. This study aims to determine the effect of the degree of lateritization in the limonite, saprolite and bedrock zones on the enrichment of economic elements. A number of 95 samples collected from 9 drill holes and analyzed using XRF to determine the main elements and economic elements. The degree of lateritization is calculated from the SiO2 content divided by the total accumulation of SiO2, Al2O3 and Fe2O3 resulting the S/SAF index which describes the intensity of the chemical reaction. The lowest value of the S/SAF index indicates a higher degree of lateritization. Each limonite, saprolite and bedrock zone has S/SAF index values ​​ranging from 0.16 to 58 (strong lateritization), 0.27 to 0.85 (medium lateritization-kaolinization) and 0.77 to 1.24 (mother rock). The zone with a strong degree of lateritization contains Fe levels between 36% to 51%, Ni 0.80% to 1.38% and Co 0.07% to 1.17%. The bedrock contains 4.86% to 7.99% Fe, 0.20% to 1.76% Ni and 0.005% to 0.015% Co. The degree of lateritization in the limonite zone is higher than the saprolite and bedrock zones. This is caused by the decomposition of silica minerals to form the iron and aluminum oxide-hydroxide bearing minerals. The degree of lateritization has a positive correlation with the enrichment of Fe and Co. However, the distribution of high Ni not correlated with the index of lateritization.
REKOMENDASI AREA LOKASI TAPAK SUMUR EKSPLORASI PANAS BUMI MENGGUNAKAN PEMODELAN SISTEM INFORMASI GEOGRAFIS DI DAERAH PROSPEK CISOLOK-CISUKARAME, SUKABUMI, JAWA BARAT: RECCOMENDATION FOR GEOTHERMAL EXPLORATION WELLPAD AREA USING GEOGRAPHIC INFORMATION SYSTEM MODELING IN CISOLOK-CISUKARAME PROSPECT, SUKABUMI, WEST JAVA Husin Setia Nugraha; Dadan Wildan; Rina Wahyuningsih; Reynold Tampubolon
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v18i3.420

Abstract

The use of Geographic Information System (GIS) modelling in developing geothermal resources has been widely carried out, from the initial survey and exploration to exploitation or production stages. This GIS modelling aims to delineate specific locations that are considered to have geothermal resources or are suitable for geothermal field production facilities. This study aims to obtain a map of the recommended wellpad area for the optimal geothermal exploration well drilling location by considering technical and non-technical parameters. This research was conducted in the Cisolok-Cisukarame geothermal prospect area in Sukabumi Regency, West Java Province. The map is produced by integrating eight parameters that will affect the amount of drilling costs: prospect area, slope, reservoir crest depth area, geological structure, water source, access road, settlement area, surface manifestation area, and cultural heritage area. In the early stages, buffer areas and classifications were made for these parameters with a specific range of values based on several considerations. Furthermore, spatial data integration is carried out using vector overlaying boolean operations. The result is a map of the wellpad recommendation area for geothermal exploration wells in the Cisolok-Cisukarame area, with an area of approximately 6.31 km2 (19.62% of the P90 prospect area). Using a 120-meter fishnet produces eight large cluster areas and five small cluster areas, which are suitable for wellpad of standard hole. Meanwhile, the 50-meter fishnet produces the same number of clusters and five other smaller clusters. The results of this study can be used as recommendations for areas to be used as well as footprint locations and planning for further field survey activities such as geotechnical and infrastructure surveys.
KARAKTERISTIK ENDAPAN BIJIH BESI LATERIT PADA BLOK BARAT DAN BLOK TIMUR PT SILO, KABUPATEN KOTABARU, KALIMANTAN SELATAN BERDASARKAN ANALISIS GEOKIMIA DAN MINERALOGI : CHARACTERISTICS OF LATERITE IRON ORE DEPOSIT IN WEST BLOCK AND EAST BLOCK OF PT SILO, KOTABARU DISTRICT, SOUTH KALIMANTAN BASED ON GEOCHEMICAL AND MINERALOGICAL ANALYSIS Putri Ramadhani, Ayumi Hana; Andi Cahyadi; Tatik Handayani; Suwahyadi
Buletin Sumber Daya Geologi Vol 18 No 3 (2023): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v18i3.425

Abstract

This research was conducted to identify the characteristics of laterite deposits in the western and eastern blocks of Sebuku Island, Kotabaru Regency, South Kalimantan using field observation methods, and laboratory analysis including titration, XRF, XRD and petrography analysis. The characteristics of the western block laterite deposits are 10 meters until 15 meters deep. The red limonite zone has Fe content of 51.25% with a mineral composition of hematite, magnetite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 50.1% with a mineral composition of goethite, hematite, gibsite, ilmenite. The saprolite zone has Fe content of 16.2%, the mineral composition is hematite, chrysotile, goethite, garnet, diopside. The characteristics of the eastern block laterite deposits are that they have a depth of 6 meters until 7.5 meters. The red limonite zone has Fe content of 47.38% with a mineral composition of hematite, goethite, ilmenite, spinel. The yellow limonite zone has Fe content of 38.70% with a mineral composition of goethite, hematite, chromite, gibbsite, spinel. The saprolite zone has Fe content of 15.08%, the mineral composition is hematite, goethite, diopside, fayalite. The bedrock of the research area is in the form of periodotite, namely dunite and harzburgite which have been serpentinized. The mineral composition of the bedrock is olivine, pyroxene, opaque minerals and several secondary minerals, namely serpentine and talc. The west block bedrock has Fe content of around 7.73 % until 8.03% while the east block bedrock has Fe content of around 6.59 % until 7.49%.
EVALUASI KELAYAKAN PROYEK DAN PERANKINGAN AREA PROSPEK PANAS BUMI KANDIDAT LOKASI PROGRAM GOVERNMENT DRILLING: EVALUATION OF FEASIBILITY AND RANKING OF GEOTHERMAL PROSPECT AREA CANDIDATES FOR GOVERNMENT DRILLING PROGRAM LOCATIONS Nugraha, Husin Setia; Wildan, Dadan; Rina Wahyuningsih
Buletin Sumber Daya Geologi Vol 19 No 2 (2024): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47599/bsdg.v19i2.431

Abstract

Government drilling is a geothermal exploration well drilling program carried out by the government. For planning, it is necessary to rank candidate prospect areas to be included in the program. This study ranked twenty candidate drilling sites using the incremental internal rate of return or incremental IRR method from discounted cash flow (DCF) calculations. The stages for the method are calculating project value and feasibility based on profitability parameters in each prospect area and calculating and ranking based on incremental IRR. As a result, based on the value of the profitability parameter, only two candidate areas for the program are feasible based on the project's IRR and NPV values, namely Nage and Mount Galunggung. Meanwhile, based on the BCR value, in addition to those two locations, two prospect areas are categorized as feasible, namely Bittuang and Mount Papandayan. Thus, Nage and Mount Galunggung are financially viable, and Bittuang and Mount Papandayan are economically viable. Improving the financial viability of Bittuang and Gunung Papandayan requires other fiscal incentives. For ranking, the results based on incremental IRR calculations and IRR result in the same order for the top four or the viable projects. The same results are because of their homogeneous project type, which is a geothermal project. Based on the results of this study, it is recommended to re-evaluate candidate prospect area locations for the program. It is because out of twenty candidate locations, only two are financially viable, and four are economically viable. Choosing the right location is one of the keys to the success of this program.

Page 73 of 76 | Total Record : 751

 71   72   73   74   75 

Filter by Year

2006 2025


Reset
Filter By Issues
All Issue Vol 20 No 3 (2025): Buletin Sumber Daya Geologi Vol 20 No 2 (2025): Buletin Sumber Daya Geologi Vol 20 No 1 (2025): Buletin Sumber Daya Geologi Vol 19 No 3 (2024): Buletin Sumber Daya Geologi Vol 19 No 2 (2024): Buletin Sumber Daya Geologi Vol 19 No 1 (2024): Buletin Sumber Daya Geologi Vol. 18 No. 3 (2023): Buletin Sumber Daya Geologi Vol 18 No 3 (2023): Buletin Sumber Daya Geologi Vol 18 No 2 (2023): Buletin Sumber Daya Geologi Vol. 18 No. 2 (2023): Buletin Sumber Daya Geologi Vol. 18 No. 1 (2023): Buletin Sumber Daya Geologi Vol. 17 No. 3 (2022): Buletin Sumber Daya Geologi Vol. 17 No. 2 (2022): Buletin Sumber Daya Geologi Vol. 17 No. 1 (2022): Buletin Sumber Daya Geologi Vol. 16 No. 3 (2021): Buletin Sumber Daya Geologi Vol. 16 No. 2 (2021): Buletin Sumber Daya Geologi Vol. 16 No. 1 (2021): Buletin Sumber Daya Geologi Vol. 15 No. 3 (2020): Buletin Sumber Daya Geologi Vol. 15 No. 2 (2020): Buletin Sumber Daya Geologi Vol. 15 No. 1 (2020): Buletin Sumber Daya Geologi Vol 15 No 1 (2020): Buletin Sumber Daya Geologi Vol. 14 No. 3 (2019): Buletin Sumber Daya Geologi Vol 14, No 3 (2019): Buletin Sumber Daya Geologi Vol. 14 No. 2 (2019): Buletin Sumber Daya Geologi Vol 14, No 2 (2019): Buletin Sumber Daya Geologi Vol 14, No 1 (2019): Buletin Sumber Daya Geologi Vol. 14 No. 1 (2019): Buletin Sumber Daya Geologi Vol 13 No 3 (2018): Buletin Sumber Daya Geologi Vol 13, No 3 (2018): Buletin Sumber Daya Geologi Vol. 13 No. 3 (2018): Buletin Sumber Daya Geologi Vol. 13 No. 2 (2018): Buletin Sumber Daya Geologi Vol 13 No 2 (2018): Buletin Sumber Daya Geologi Vol 13, No 2 (2018): Buletin Sumber Daya Geologi Vol 13, No 1 (2018): Buletin Sumber Daya Geologi Vol. 13 No. 1 (2018): Buletin Sumber Daya Geologi Vol 13 No 1 (2018): Buletin Sumber Daya Geologi Vol 12, No 3 (2017): Buletin Sumber Daya Geologi Vol. 12 No. 3 (2017): Buletin Sumber Daya Geologi Vol 12 No 3 (2017): Buletin Sumber Daya Geologi Vol. 12 No. 2 (2017): Buletin Sumber Daya Geologi Vol 12 No 2 (2017): Buletin Sumber Daya Geologi Vol 12, No 2 (2017): Buletin Sumber Daya Geologi Vol 12, No 1 (2017): Buletin Sumber Daya Geologi Vol. 12 No. 1 (2017): Buletin Sumber Daya Geologi Vol 12 No 1 (2017): Buletin Sumber Daya Geologi Vol. 11 No. 3 (2016): Buletin Sumber Daya Geologi Vol 11 No 3 (2016): Buletin Sumber Daya Geologi Vol 11, No 3 (2016): Buletin Sumber Daya Geologi Vol 11, No 2 (2016): Buletin Sumber Daya Geologi Vol. 11 No. 2 (2016): Buletin Sumber Daya Geologi Vol 11 No 2 (2016): Buletin Sumber Daya Geologi Vol. 11 No. 1 (2016): Buletin Sumber Daya Geologi Vol 11 No 1 (2016): Buletin Sumber Daya Geologi Vol 11, No 1 (2016): Buletin Sumber Daya Geologi Vol 10, No 3 (2015): Buletin Sumber Daya Geologi Vol 10 No 3 (2015): Buletin Sumber Daya Geologi Vol. 10 No. 3 (2015): Buletin Sumber Daya Geologi Vol 10 No 2 (2015): Buletin Sumber Daya Geologi Vol. 10 No. 2 (2015): Buletin Sumber Daya Geologi Vol 10, No 2 (2015): Buletin Sumber Daya Geologi Vol 10, No 1 (2015): Buletin Sumber Daya Geologi Vol 10 No 1 (2015): Buletin Sumber Daya Geologi Vol. 10 No. 1 (2015): Buletin Sumber Daya Geologi Vol 10, No 1 (2015): Buletin Sumber Daya Geologi Vol 9 No 3 (2014): Buletin Sumber Daya Geologi Vol. 9 No. 3 (2014): Buletin Sumber Daya Geologi Vol 9, No 3 (2014): Buletin Sumber Daya Geologi Vol 9 No 2 (2014): Buletin Sumber Daya Geologi Vol 9, No 2 (2014): Buletin Sumber Daya Geologi Vol. 9 No. 2 (2014): Buletin Sumber Daya Geologi Vol 9, No 1 (2014): Buletin Sumber Daya Geologi Vol 9 No 1 (2014): Buletin Sumber Daya Geologi Vol. 9 No. 1 (2014): Buletin Sumber Daya Geologi Vol 8 No 3 (2013): Buletin Sumber Daya Geologi Vol. 8 No. 3 (2013): Buletin Sumber Daya Geologi Vol 8, No 3 (2013): Buletin Sumber Daya Geologi Vol 8 No 2 (2013): Buletin Sumber Daya Geologi Vol 8, No 2 (2013): Buletin Sumber Daya Geologi Vol. 8 No. 2 (2013): Buletin Sumber Daya Geologi Vol 8 No 1 (2013): Buletin Sumber Daya Geologi Vol. 8 No. 1 (2013): Buletin Sumber Daya Geologi Vol 8, No 1 (2013): Buletin Sumber Daya Geologi Vol 7 No 3 (2012): Buletin Sumber Daya Geologi Vol 7, No 3 (2012): Buletin Sumber Daya Geologi Vol. 7 No. 3 (2012): Buletin Sumber Daya Geologi Vol 7, No 2 (2012): Buletin Sumber Daya Geologi Vol 7 No 2 (2012): Buletin Sumber Daya Geologi Vol. 7 No. 2 (2012): Buletin Sumber Daya Geologi Vol 7 No 1 (2012): Buletin Sumber Daya Geologi Vol 7, No 1 (2012): Buletin Sumber Daya Geologi Vol. 7 No. 1 (2012): Buletin Sumber Daya Geologi Vol 6 No 3 (2011): Buletin Sumber Daya Geologi Vol 6, No 3 (2011): Buletin Sumber Daya Geologi Vol. 6 No. 3 (2011): Buletin Sumber Daya Geologi Vol 6 No 2 (2011): Buletin Sumber Daya Geologi Vol 6, No 2 (2011): Buletin Sumber Daya Geologi Vol. 6 No. 2 (2011): Buletin Sumber Daya Geologi Vol 6, No 1 (2011): Buletin Sumber Daya Geologi Vol 6 No 1 (2011): Buletin Sumber Daya Geologi Vol. 6 No. 1 (2011): Buletin Sumber Daya Geologi Vol 5 No 3 (2010): Buletin Sumber Daya Geologi Vol 5, No 3 (2010): Buletin Sumber Daya Geologi Vol. 5 No. 3 (2010): Buletin Sumber Daya Geologi Vol 5, No 2 (2010): Buletin Sumber Daya Geologi Vol. 5 No. 2 (2010): Buletin Sumber Daya Geologi Vol 5 No 2 (2010): Buletin Sumber Daya Geologi Vol. 5 No. 1 (2010): Buletin Sumber Daya Geologi Vol 5 No 1 (2010): Buletin Sumber Daya Geologi Vol 5, No 1 (2010): Buletin Sumber Daya Geologi Vol 4, No 3 (2009): Buletin Sumber Daya Geologi Vol 4 No 3 (2009): Buletin Sumber Daya Geologi Vol. 4 No. 3 (2009): Buletin Sumber Daya Geologi Vol 4 No 2 (2009): Buletin Sumber Daya Geologi Vol. 4 No. 2 (2009): Buletin Sumber Daya Geologi Vol 4, No 2 (2009): Buletin Sumber Daya Geologi Vol 4 No 1 (2009): Buletin Sumber Daya Geologi Vol 4, No 1 (2009): Buletin Sumber Daya Geologi Vol. 4 No. 1 (2009): Buletin Sumber Daya Geologi Vol 3 No 3 (2008): Buletin Sumber Daya Geologi Vol. 3 No. 3 (2008): Buletin Sumber Daya Geologi Vol 3, No 3 (2008): Buletin Sumber Daya Geologi Vol 3 No 2 (2008): Buletin Sumber Daya Geologi Vol 3, No 2 (2008): Buletin Sumber Daya Geologi Vol. 3 No. 2 (2008): Buletin Sumber Daya Geologi Vol 3, No 1 (2008): Buletin Sumber Daya Geologi Vol 3 No 1 (2008): Buletin Sumber Daya Geologi Vol. 3 No. 1 (2008): Buletin Sumber Daya Geologi Vol 2 No 3 (2007): Buletin Sumber Daya Geologi Vol. 2 No. 3 (2007): Buletin Sumber Daya Geologi Vol 2, No 3 (2007): Buletin Sumber Daya Geologi Vol 2 No 2 (2007): Buletin Sumber Daya Geologi Vol 2, No 2 (2007): Buletin Sumber Daya Geologi Vol. 2 No. 2 (2007): Buletin Sumber Daya Geologi Vol 2 No 1 (2007): Buletin Sumber Daya Geologi Vol. 2 No. 1 (2007): Buletin Sumber Daya Geologi Vol 2, No 1 (2007): Buletin Sumber Daya Geologi Vol 1 No 1 (2006): Buletin Sumber Daya Geologi Vol 1, No 1 (2006): Buletin Sumber Daya Geologi Vol. 1 No. 1 (2006): Buletin Sumber Daya Geologi More Issue