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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Jurnal RISET Geologi dan Pertambangan Geoscience Journal Jurnal Teknologi Mineral dan Batubara Journal of Geoscience, Engineering, Environment, and Technology JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) BULLETIN OF THE MARINE GEOLOGY Buletin Sumber Daya Geologi Jurnal Geominerba Jurnal Teknologi Mineral dan Batubara
Johanes Hutabarat
Fakultas Teknik Geologi Universitas Padjadjaran, Bandung.
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Other

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KARAKTERISTIK BATUAN BLOK ASING (EXOTIC BLOCK) DI DAERAH SADANG KULON KOMPLEKS MELANGE LUK ULO KARANGSAMBUNG Agung Mulyo, Ega Pratama, Johanes hutabarat,
Geoscience Journal Vol 1, No 1 (2017): Padjadjaran Geoscience Journal
Publisher : Unpad

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2386.615 KB)

Abstract

Lokasi  penelitiannya  terletak  di  Kompleks  melange  Luk  Ulo,  Karangsambung,  Jawa  Tengah.  Batuan terdiri atas campuran berbagai batuan Pra Tersier sebagai exotic block dan batuan Tersier sebagai native block yang  tertanam  secara tektonik  dalam  matriks  lempung  bersisik.  Adapun  jenis-jenis  batuan  yaitu batuan ofiolit, metamorf, dan rijang. Kompleks Melange Lok Ulo merupakan produk subduksi konvergen antara Indo-Australia dan lempeng Eurasia sejak Kapur hingga Paleosen. Berdasarkan pengamatan  langsung  dilapangan  serta  analisis  petrografi  pada  sample  yang  dipilih  secara acak  dari  batuan  metamorf  sekis  dan  serpentinit  serta  batuan  sedimen  pelagis  rijang,  mengindikasikan adanya  batuan  metamorf  derajat  rendah  hingga  menengah  serta  adanya  retrograde kristalisasi  akibat proses akresi dan pemunculan ke permukaan oleh sesar-sesar naik tersebut pada zona subduksi.  Kata kunci:  Kompleks melange Luk Ulo, Metamorfisme derajat rendah, Metamorfisme derajat menengah, Pra Tersier, Akresi, Retrograde
REE Comparison Between Muncung Granite Samples and their Weathering Products, Lingga Regency, Riau Islands Irzon, Ronaldo; Syafri, Ildrem; Hutabarat, Johannes; Sendjaja, Purnama
Indonesian Journal on Geoscience Vol 3, No 3 (2016)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.3.3.149-161

Abstract

DOI:10.17014/ijog.3.3.149-161The increasing demand for Rare Earth Elements (REE) is related to the continous development of technology, and these elements are used in modern equipments. REE can occur in igneous and sedimentary rocks in significant amounts as primary deposits, whereas the secondary REE deposit can be produced by intensive lateritic weathering of bedrocks under the tropical or subtropical climate. Lateritic process can increase REE concentration from sub-economic levels in host rocks to be more valuable. Muncung Granite is located in a tropical area of Lingga Regency, Riau Islands Province. REE occurs in the Muncung Granite and in weathered layers (saprolite, laterite, and soil). ICP-MS was applied to measure the REE content in all samples of this study. The average REE content of the Muncung Granite is 265 ppm with Eu anomaly in REE’s spider diagrams. Lateritization process has increased REE content by more than four times compared to that in the Muncung Granite. Ce and Eu anomalies in weathered layers can be associated with weathering process and initial REE contents in the host rock. Ce anomaly in a laterite layer is found to have a negative correlation to REE total enrichment. The REE level in the Muncung Granite is higher than the content in the soil and saprolite layers, but lower than that in the laterite.
The Determination of Volcanic Characteristics Based on Deuterium and Oxygen-18 Isotope Compositions: A Case Study at Dieng Plateau, Central Java Priatna, Priatna; Sulaksana, Nana; Hutabarat, Johanes; Haryanto, Iyan
Indonesian Journal on Geoscience Vol 7, No 2 (2020)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.7.2.201-213

Abstract

DOI:10.17014/ijog.7.2.201-213To find out volcanic characteristics, a geochemical approach can be used, one of which is through the measurement of deuterium and oxygen-18 isotopes from condensate and crater water samples. In this study, Dieng Plateau in Central Java was chosen, because it has a wide spread of fumarole fields and crater water. In addition, research in the Dieng Plateau is very useful in the management of geological-based tourism and geopark development in the future. Results of isotope analysis in Candradimuka Crater show the average number of isotope deuterium is δD – 500/00 and isotope oxygen-18 is δ18O –30/00 which produce the value of the mixing fraction of f 18O = 47.11%. This figure is the highest isotope number compared to other craters on the Dieng Plateau. The high value of the isotope-18 mixing fraction is supported by a strong plume from three vents in Candradimuka. Meanwhile, the results of crater water isotope tests obtained the highest results in Sikidang Crater with the value of the deuterium isotope is δD = – 10.300/00 and the isotope oxygen-18 is δ18O = 6.570/00 which are in the metamorphic water area from the mixing of magmatic processes with surface meteoric water. Based on the deuterium isotope approach with oxygen-18 crater water and fumarole condensate supported by subsurface temperature data, most of the Dieng Plateau has magmatic-hydrothermal characteristics, except Candradimuka Crater which belongs to the magmatic group. 
POLA ALIRAN PANAS BERDASARKAN ANALISIS FLUIDA DAN MINERAL UBAHAN DI DAERAH PANAS BUMI SORIK MARAPI, KABUPATEN MANDAILING NATAL, PROVINSI SUMATRA UTARA: HEAT FLOW PATTERN BASED ON ANALYSIS OF GEOTHERMAL FLUID AND ALTERATION MINERAL IN SORIK MARAPI REGION, MANDAILING NATAL DISTRICT, NORTH SUMATRA PROVINCE Azizi, Hisyam Azhar; Agus Didit Haryanto; Johanes Hutabarat; Dicky Muslim; Dewi Gentana; Ryan Hidayat
Buletin Sumber Daya Geologi Vol. 15 No. 3 (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.v15i3.309

Abstract

Sorik Marapi geothermal area in Mandailing Natal Regency, North Sumatra Province has a high-temperature geothermal system that is interpreted from the chemical characteristics of hot springs. The presence of alteration minerals such as epidot in exploration well cutting samples strengthens the estimated reservoir temperature reaches 235⁰C. The presence of hot water are more acidic hot spring around fumaroles and the minerals obtained from the drill well reflect the upflow zone while the hot spring group of neutral chloride water in the north with lower elevation reflects the outflow zone of the geothermal system here. This is a characteristic of hot fluid flow that occurs in geothermal areas of volcanic systems with steep terrain as well as Sorik Marapi area.
ANALISIS PENGINDERAAN JAUH DAN PEMODELAN 3D FAULT FRACTURE DENSITY (FFD) DALAM PENENTUAN ZONA PERMEABILITAS PERMUKAAN DI WILAYAH PANAS BUMI GUNUNG TAMPOMAS, JAWA BARAT: REMOTE SENSING ANALYSIS AND 3D FAULT FRACTURE DENSITY (FFD) MODELING INTO DETERMINATION OF SURFACE PERMEABILITY ZONES IN MOUNT TAMPOMAS GEOTHERMAL AREA, WEST JAVA Adi, Abizar; Haryanto, Agus Didit; Hutabarat, Johanes; Gentana, Dewi
Buletin Sumber Daya Geologi Vol. 16 No. 2 (2021): 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.v16i2.325

Abstract

The area of Mount Tampomas which is located in Buahdua District, Conggeang District, and Tanjungkerta District, Sumedang Regency, West Java was chosen as the research area because it is predicted to have geothermal potential with the presence of geothermal manifestations such as hot springs. The presence of manifestations relates to permeable zones controlled by geological structures. The lineament of the ridge and valley was observed and analyzed using ASTER GDEM remote sensing imagery and Indonesia Earth Form map (RBI), scale 1:25.000. The purpose of the study is to find out the relationship between permeability and the presence of geothermal manifestations in the research area. Research method by conducting remote sensing and fault fracture Density (FFD) analysis using 3D micromine software modeling. Results of remote sensing analysis with irradiation angle of 0°, 45°, 90°, 135° and altitude 45° shows the main pattern of the ridge - valley lineament interpreted as a fault in the research area have a relatively northwest-southeast and northeast-southwest direction. Indications of geological structures in the field are shown by the morphology of valley-ridges, in some places has a steep slope that form the fault escarpment and triangular facet. The FFD analysis results in the research area have varying permeability classes shown by low FFD values (0.00–3.00 km-1), medium (3.00-6.00 km-1) and high (6.00–9.33 km-1). The geothermal manifestations appear in the permeability zone that have medium to high FFD values marked by orange and red colors. From 3D micromine software modeling of the permeability zone and plotting of hot springs on the surface, it is clear that the appearance of hot springs to the surface is facilitated by faults that develop in the research area.
The Permeability of Granite Weathering Soil in Tanjungpinang, Bintan Island, Indonesia Fery Erawan; Emi Sukiyah; Johanes Hutabarat; Adjat Sudradjat
Journal of Geoscience, Engineering, Environment, and Technology Vol. 5 No. 3 (2020): JGEET Vol 05 No 03 : September (2020)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2020.5.3.5285

Abstract

Bintan Island is a part of Riau Islands Province. On this island, the capital city is Tanjungpinang. The compliance of public facilities such as landfill waste is a priority in this city. Landfill design that suitable in this area is a sanitary landfill system. The soil layer uses to cover the waste in this landfill system. The closure did gradually avoid the disruption of waste processing. The type of soil for its landfill cover has to be able to control the leachate. It controlled by the permeability of the soil. The methods used in this study are the analysis of the physical and mechanical properties of soil. Rock and soil samples are obtained systematically through trenching. Sampling-based on changes in physical properties of soil that reflect its mechanical properties. A probabilistic approach used to solve the problems and to get accurate results. The geomorphology of the study area divided into four units. They are very flat terrain, flat terrain, slightly steep hills, and steep hills. The sample used for the study is undisturbed soil. Analysis of the physical and mechanical properties of soil shows the types of soil, such as SW, GM, MH-OH, and CH. However, MH is the most dominant type of soil. Each of the soil types represents a certain degree of weathering. The degree of weathering in the study area varies from the III degree to VI degrees. Rocks are weathering form clay mineral, which compiles the soil. Clay mineral in the soil layer is varied from quartz, illite, kaolinite, gibbsite, goethite, and hematite—the impact of the swelling of clay. The swelling of clay in the study area ranged from low to high. The properties and composition of the soil are affected by the permeability value.
Intensitas Erosi pada Kerucut Sinder Gunungapi Slamet Berdasarkan Pembagian Kelas Morfometri Kerucut, Jawa Tengah Wilda Aini Nurlathifah; Ildrem Syafri; Johanes Hutabarat; Agustina Djafar
Jurnal Lingkungan dan Bencana Geologi Vol 10, No 2 (2019)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5818.278 KB) | DOI: 10.34126/jlbg.v10i2.261

Abstract

Gunung Slamet memiliki 35 kerucut sinder di sisi lereng timurnya. Kerucut ini menyebar secara acak dan hadir baik di tubuh Gunung Slamet dan sebagian kecil di kaki Gunung Slamet. Kerucut sinder ini merupakan jenis kerucut parasit monogenetik yang muncul setelah Gunung Slamet Tua terbentuk. Meskipun secara sekilas kenampakan morfologi kerucut sinder Gunung Slamet hampir seluruhnya sama, namun dengan menggunakan data citra beresolusi tinggi akan didapat perbedaan bentuk kenampakan morfologinya. Dari kenampakan morfologi ini dapat dihitung morfometrinya untuk ditentukan kelas kerucutnya. Menurut Taylor, dkk. (2003), kelas morfometri kerucut sinder ini berhubungan dengan tingkat degradasi atau erosi dari suatu kerucut. Tujuan penelitian ini adalah untuk mengidentifikasi intensitas erosi yang terjadi pada kerucut sinder Gunung Slamet berdasarkan pembagian kelas morfometrinya. Metode penelitian yang digunakan adalah metode analisis morfometri dengan menggunakan citra satelit TerraSar untuk menghitung parameter kerucut, seperti bentuk kerucut, bentuk kawah, relief, sudut lereng kerucut, dan rasio tinggi kerucut/diameter alas kerucut. Untuk memudahkan penelitian, dipilih 5 buah kerucut sinder yang mewakili kelompok kerucut yang hadir di tubuh (fasies medial) dan di kaki (fasies distal) Gunung Slamet baik secara soliter maupun berkelompok. Kelima kerucut sinder tersebut adalah Kerucut Sinder Bukit Lingi/Pisang, Kerucut Sinder Bukit Kandanggotong, Kerucut Sinder Bukit Siremeng, Kerucut Sinder Bukit Batusanggar dan Kerucut Sinder Bukit Telu. Kelas morfometri kerucut 1 menunjukkan tingkat erosi yang paling rendah dengan karakteristik bentuk kerucut yang masih cukup sempurna, bentuk kawah yang masih terlihat jelas dan dalam, nilai sudut lereng yang besar, relief yang cukup halus, dan rasio tinggi/diameter alas kerucut yang cukup tinggi. Semakin besar angka dalam kelas morfometri kerucut sinder memberi arti bahwa intensitas erosi semakin besar. Dari kelima kerucut sinder yang dianalisis diketahui bahwa kerucut sinder Bukit Telu yang terletak pada kaki Gunung Slamet memiliki kelas morfometri kerucut 1. Hal ini berarti intensitas erosinya paling rendah. Sementara itu, kerucut sinder Bukit Siremeng yang terletak di tubuh Gunung Slamet masuk ke dalam kelas kerucut 4 dan memiliki intensitas erosi paling tinggi dibandingkan dengan keempat kerucut lainnya.
Imobilitas Unsur Tanah Jarang (UTJ) selama Mineralisasi Cu pada Granitoid Sulit Air, Provinsi Sumatra Barat Ronaldo Irzon; Ildrem Syafri; Iwan Setiawan; Johanes Hutabarat; Purnama Sendjaja; Agus Didit Haryanto
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 29, No 2 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2019.v29.1019

Abstract

Transfer massa terkait perubahan komposisi geokimia batuan induk akibat alterasi hidrotermal, metasomatisme, maupun pelapukan menjadi topik untuk mempelajari proses geologi terkait. Perubahan massa tersebut dapat dijelaskan dan divisualisasikan melalui metode Isocon. Mineralisasi tembaga teridentifikasi pada salah satu bagian dari Granitoid Sulit Air di Kecamatan X Koto Diatas, Kabupaten Solok. Tulisan ini bertujuan untuk menjelaskan transfer massa akibat mineralisasi Cu pada Granitoid Sulit Air dengan diagram Isocon. XRF dan ICP-MS di Laboratorium Pusat Survey Geologi, Kementerian ESDM (2015) digunakan sebagai perangkat pengukuran kadar oksida utama, unsur jejak, dan unsur tanah jarang. Berdasarkan korelasi antara kandidatnya, Al2O3 dianggap sebagai oksida immobile. K2O, Rb, Sr, dan Ba terkayakan sedangkan oksida utama lain maupun unsur jejak diketahui terkurangkan akibat mineralisasi Cu. UTJ  terdeteksi immobile akibat mineralisasi Cu dengan karakter yang relatif sama antara batuan segar dan teralterasi. Meski demikian, sebagian Ce teroksidasi akibat proses mineralisasi sehingga menurunkan anomali positif Ce. Penurunan nilai anomali negatif Eu pada sampel teralterasi dapat mengakibatkan plagioklas semakin terkurangkan. Karakter tipe-I Granitoid Sulit Air diperjelas melalui nilai perbandingan A/CNK, perbandingan N2O terhadap K2O, perbandingan Rb/Sr, dan perbandingan Rb/Ba. Afinitas granitoid busur kepulauan menunjukkan bahwa pembentukan Granitoid Sulit Air terkait dengan vulkanisme di bagian barat Sumatra.Mass transfer related changes in the geochemical composition of the host rock due to hydrothermal alteration, metamorphism, and weathering is an interesting topic for studying related geological processes. The transfer can be explained and visualized through the Isocon method. Copper mineralization was identified in an area of Sulit Air Suite at X Koto Diatas District, Solok Regency. This paper aims to explain mass transfer due to Cu mineralization on Sulit Air Suite with Isocon diagrams. XRF and ICP-MS of the Center for Geological Survey Laboratory were applied to measure the major oxides, trace elements, and rare earth elements contents of the samples. Based on the correlation between candidates, Al2O3 is considered as the immobile species. K2O, Rb, Sr, and Ba appear to be enriched while other major oxides and rare elements are reduced due to Cu mineralization. REEs are immobile due to Cu mineralization with relatively the same character between fresh and altered rocks. However, some Ce was probably oxidized due to the mineralization process thus reducing the positive anomaly Ce. Moreover, the more negative Eu anomaly means that plagioclase might have been replaced by K-feldspar due to this alteration. The I-type characters of Sulit Air Suite are clarified by  A/CNK value, N2O to K2O comparison, Rb/Sr ratio, and Rb/Ba ratio. The affinity to the volcanic arc granitoid implies that the Sulit Air Suite is related to volcanism in the western part of Sumatra.  
The Determination of Volcanic Characteristics Based on Deuterium and Oxygen-18 Isotope Compositions: A Case Study at Dieng Plateau, Central Java Priatna Priatna; Nana Sulaksana; Johanes Hutabarat; Iyan Haryanto
Indonesian Journal on Geoscience Vol 7, No 2 (2020)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.7.2.201-213

Abstract

DOI:10.17014/ijog.7.2.201-213To find out volcanic characteristics, a geochemical approach can be used, one of which is through the measurement of deuterium and oxygen-18 isotopes from condensate and crater water samples. In this study, Dieng Plateau in Central Java was chosen, because it has a wide spread of fumarole fields and crater water. In addition, research in the Dieng Plateau is very useful in the management of geological-based tourism and geopark development in the future. Results of isotope analysis in Candradimuka Crater show the average number of isotope deuterium is δD – 500/00 and isotope oxygen-18 is δ18O –30/00 which produce the value of the mixing fraction of f 18O = 47.11%. This figure is the highest isotope number compared to other craters on the Dieng Plateau. The high value of the isotope-18 mixing fraction is supported by a strong plume from three vents in Candradimuka. Meanwhile, the results of crater water isotope tests obtained the highest results in Sikidang Crater with the value of the deuterium isotope is δD = – 10.300/00 and the isotope oxygen-18 is δ18O = 6.570/00 which are in the metamorphic water area from the mixing of magmatic processes with surface meteoric water. Based on the deuterium isotope approach with oxygen-18 crater water and fumarole condensate supported by subsurface temperature data, most of the Dieng Plateau has magmatic-hydrothermal characteristics, except Candradimuka Crater which belongs to the magmatic group. 
PENINGKATAN MUTU BIJIH BAUKSIT TAYAN MENGGUNAKAN PEMISAH MAGNETIK Stefanus Suryo Cahyono; Ildrem Syafri; Johanes Hutabarat
Jurnal Teknologi Mineral dan Batubara Vol 15, No 1 (2019): Jurnal Teknologi Mineral dan Batubara Edisi Januari 2019
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.114 KB) | DOI: 10.30556/jtmb.Vol15.No1.2019.948

Abstract

Sumberdaya bauksit yang ada di Tayan, Kalimantan Barat belum dimanfaatkan secara optimal dan perlu dilakukan peningkatan nilai tambah bauksit melalui proses pencucian dan pengolahan, sehingga perlu dilakukan pengkajian peningkatan mutu bijih bauksit. Percontoh bijih bauksit yang diambil dari daerah Tayan memiliki kadar SiO2 total 11,55%, Al2O3 43,64%, Fe2O3 9,63%. Proses peningkatan mutu (upgrading) bijih bauksit bertujuan untuk menaikkan kadar bauksit agar memenuhi persyaratan alumina di atas 51% Al2O3, maksimum 3% SiO2 dan maksimum 7 % Fe2O3 untuk bahan baku alumina. Tahapan proses scrubbing meliputi pemercontohan, scrubbing, pengayakan, pengeringan, penimbangan, penggerusan, pemisah magnetik dan analisis kimia. Parameter mutu yang digunakan untuk menilai keberhasilan adalah persen kumulatif ukuran butiran +2 mm (+10 mesh), perolehan Al2O3, kadar SiO2 total, Al2O3, dan Fe2O3. Uji coba proses pencucian-magnetik separator ini telah memberikan hasil yang baik ditinjau dari peningkatan kadar Al2O3 dan perolehan Al2O3. Kadar Al2O3hasil uji coba berkisar antara 57,29-59,78% dengan perolehan berkisar 69,67-85,58%. Bauksit tercuci-magnetik separator yang dihasilkan telah meningkatkan mutu bijih bauksit sebagai bahan baku pembuatan alumina melalui proses Bayer. 
Co-Authors Ade Ihsanudin Adi, Abizar Adjat Sudradjat Agus Didit Haryanto Agus Didit Haryanto Agus Didit Haryanto Agus Didit Haryanto Agus Didit Haryanto -, Agus Didit Haryanto Agustina Djafar Azizi, Hisyam Azhar Azwar Satrya Muhammad Cipta Endyana Dewi Gentana Dewi Gentana Dewi Gentana Dicky Muslim Emi Sukiyah Fauzan Thaha Assegaf Fery Erawan Gentana, Dewi Hendarmawan Hendarmawan Ildrem Syafri Ildrem Syafri Irwanda, Dharma Irzon, Ronaldo Iwan Setiawan Iyan Haryanto Khilal Khoiri Polanunu L. Sarmili -, L. Sarmili Lili Sarmili M. Ridfan Trisnadiansyah Mega F Rosana Mega Fatimah Rosana Mulyono - Nana Sulaksana Priatna Priatna Priatna, Priatna Purnama Sendjaja Putu Ayu Andhira Ronaldo Irzon Ryan Hidayat Sambodo, Tri Hananto Sendjaja, Purnama Stefanus Suryo Cahyono Sulaksana, Nana Teuku Yan Waliana Muda Iskandarsyah Vina Oktaviany Wilda Aini Nurlathifah Yudhi Listiawan