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KARAKTERISTIK ZONASI BATUAN RESERVOAR BERDASARKAN PETROGRAFI, SERBUK BOR, UJI TEKANAN DAN TEMPERATUR DI LAPANGAN PANAS BUMI SOKORIA, KABUPATEN ENDE, PROVINSI NUSA TENGGARA TIMUR: RESERVOIR CHARACTERISTICS BASED ON PETROGRAPHY, CUTTING, PRESSURE AND TEMPERATURE TEST IN SOKORIA GEOTHERMAL FIELD, ENDE REGENCY, NUSA TENGGARA TIMUR PROVINCE Purbiyantoro, Aldila Jasmine; Agus Didit Haryanto; Euis Tintin Yuningsih; Haris Siagian
Buletin Sumber Daya Geologi Vol. 15 No. 2 (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.v15i2.291

Abstract

Sokoria Geothermal Field is located at Sokoria Village, Ende Regency, Nusa Tenggara Timur Province. Petrographic analysis and Methylene Blue test (MeB) were carried out to estimate the illite-smectite ratio and occurence of other alteration minerals as indicator for cap rock, transition and reservoir zones. Pressure and temperature test (P&T test) was also performed to determine those zonation. The result concludes the geothermal caprock zone is distributed from the surface to the dept of 700 mVD (meter vertical depth), indicated by medium to high MeB index (20 – 80%), as smectite characteristic temperature up to 100°C. The transition zone is located from the depth of 700 mVD to 1100 mVD, with low MeB index (6 – 20%), as illite and illite–smectite characteristic and well temperature up to 200°C. Reservoir zone is located at 1100 mVD, indicated by very low MeB index (<10%),as characteristic of illite, with first appearance of epidote in well W-1 at 1119 mMD (meter measured depth) and well W–2 at 1338 mMD. P&T test shows reservoir temperature reached 250°C.
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.
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.  
PENGARUH TEMPERATUR DAN UKURAN BUTIR TERHADAP KELARUTAN KALIUM PADA BATUAN LEUSITIK GUNUNG MURIA JAWA TENGAH Budhy Agung; Ildrem Syafri; Agus Didit Haryanto
Jurnal Teknologi Mineral dan Batubara Vol 15, No 2 (2019): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2019
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1538.779 KB) | DOI: 10.30556/jtmb.Vol15.No2.2019.1002

Abstract

Mineral yang berpotensi di bidang pertanian sebagai sumber unsur hara (pupuk) yang dibutuhkan tanaman adalah dolomit, batuan fosfat, dan mineral silikat seperti leusit, muskovit dan ortoklas. Leusit mengandung kalium dan aluminium tektosilikat K(AlSi2O6). Mineral ini dijumpai di Kabupaten Jepara, Pati dan Kudus. Di Medani, Jepara potensinya sebanyak 190.400.000 ton, kandungan K2O antara 1,92-8,77 %. Mineral leusit untuk penelitian ini mempunyai kadar K20 antara 7,68-7,98 %; Al2O3 19,62-20,73 % dan SiO2 48,62-49,93 %. Hasil analisis petrografi menunjukkan adanya fenokris yang terdiri dari leusit, sanidin dan mineral opak. Unsur kalium di dalam leusit sulit larut, sehingga perlu diupayakan peningkatan kelarutannya dengan cara memanaskan batuan mengandung leusit tersebut pada suhu 600-1000 °C dan penghalusan ukuran butiran dari -70 sampai -200 mesh. Sebagai pembanding digunakan percontoh tanpa pemanasan. Dari hasil uji coba, kelarutan tanpa pemanasan relatif rendah antara 0,22-0,49 %; semakin halus butiran kelarutan leusit cenderung semakin meningkat, tetapi pada suhu 600 °C terjadi peningkatan cukup signifikan antara 1,55-2,30 %, pada suhu 700 °C kelarutan relatif tetap yaitu antara 1,44-2,40 %, sedangkan pada suhu 850 °C mulai terjadi penurunan kelarutan menjadi 1,20-1,95 % dan pada suhu lebih tinggi 1000 °C, kelarutan menurun menjadi 0,31-0,45 %. Percobaan peningkatan kelarutan kalium cukup signifikan sampai 10 kali, diharapkan kegunaan untuk pupuk lebih baik.
PRESISI PENGUKURAN PRODUK SAMPING TAMBANG TIMAH NUDUR MENGGUNAKAN ANALISIS XRF DAN PELUANG EKONOMI PRODUKNYA Ronaldo Irzon; Kurnia Kurnia; Agus Didit Haryanto
Jurnal Teknologi Mineral dan Batubara Vol 16, No 2 (2020): Jurnal Teknologi Mineral dan Batubara Edisi Mei 2020
Publisher : Puslitbang tekMIRA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30556/jtmb.Vol16.No2.2020.1089

Abstract

Penambangan timah hasil intrusi granit tipe-S di Pulau Bangka yang dimulai sejak periode kolonial Belanda menghasilkan produk samping. Presisi, akurasi, dan reproduktivitas dibutuhkan untuk memverifikasi hasil pengukuran perangkat analisis yang memang diperlukan dalam perkembangan ilmu kebumian. Perangkat X-ray fluorescence pada umumnya diaplikasikan untuk mengukur kandungan oksida utama dan beberapa unsur jejak yang memiliki kelimpahan tinggi. Presisi pengukuran oksida utama, unsur jejak, berikut logam tanah jarang pada percontoh produk samping penambangan timah milik PT Timah di Nudur, Pulau Bangka, menggunakan XRF adalah tujuan penelitian ini. Informasi mengenai manfaat ekonomis material sisa penambangan tersebut juga dapat diketahui melalui studi ini sehingga dapat menjadi landasan kebijakan bagi pemerintah maupun PT Timah. Seluruh analit terbukti presisi berdasarkan prinsip RSD <2/3 kali RSDHorwitz, kecuali MgO, CaO, Mo, Cr, dan Zn. Bahan sisa penambangan ini masih cukup ekonomis. Terdapat indikasi awal bahwa titanit dan malayait hadir bersama pada granit pembawa timah di Nudur berdasarkan komposisi geokimia percontoh yang dipelajari.
Zonation of Marine Geological Environment of Wangi-wangi Island Waters and Adjacent Area Wakatobi Districs Southeast Celebes Province Agus Didit Haryanto; Yudi Darlan; Vijaya Isnaniawardhani; Nisa Nurul Ilmi
BULLETIN OF THE MARINE GEOLOGY Vol 33, No 1 (2018)
Publisher : Marine Geological Institute of Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3150.509 KB) | DOI: 10.32693/bomg.33.1.2018.546

Abstract

Wakatobi is one of coastal and marine tourism destination in South–East Celebes Indonesia. Coastal and marine characteristics of this area is composed of diverse biota as the main tourism attraction. Unfortunately, increasing human needs and activities, particularly coral reefs exploitation for construction and other life aspect, endanger the sustainability of marine environment of Wakatobi and the surrounding area. The purpose of this study is to determine marine geology environmental zonation in Wangi–wangi– Kapota Islands, as a consideration for local government in monitoring and regulating the coastal area. The methods that were applied in this study are coastal characteristic mapping, sedimentology, and mineralogy analyses from 34 marine surface sediments. Marine surface sediments have been collected by Marine Geological Institute (MGI) team in 2014. The result indicates that coastal and marine characteristic of Wangi–wangi and Kapota are influenced by geological processes since Middle Miocene. The seafloor morphology is characterized by gentle slopes around coastline that is abruptly changed to very steep slopes seaward. In general, the surficial sediments consisted of biogenic sands that are distributed around coastlines and trapped within coral reefs. Coastal types of this area are generally white coral sand beaches, coral reef platforms, and notches. The area of Wangi–wangi and Kapota can be divided into 4 (four) environmental zone: Flat Plain (Zone I), Sandy Beach (Zone II), Limestone and Coral Reef (Zone III), and Sedimentary Flat (Zone IV). Zone IV in the centre area between Wangi–wangi and Kapota island is considered as the most vulnerable area due to both natural and anthropogenic factor. Keywords: zonation, seafloor morphology, tourism, Wangi–wangi–Wakatobi, Southeast Celebes ProvinceWakatobi adalah salah satu tujuan wisata pantai dan laut yang menarik dikunjungi di Sulawesi Tenggara, Indonesia. Karakteristik pantai dan laut daerah ini disusun oleh keragaman biota laut yang merupakan daya tarik bagi pariwisata. Sayangnya, seiring dengan berkembangnya aktifitas dan kebutuhan manusia, terutama meningkatnya eksploitasi pemanfaatan terumbu karang untuk konstruksi bangunan dan berbagai aspek kehidupan, mengancam kelestarian lingkungan alami Wakatobi dan sekitarnya. Oleh karena itu, penelitian ini dilakukan dengan tujuan untuk membuat zonasi lingkungan pantai dan sekitarnya di Pulau Wangi–wangi dan Kapota, sehingga bisa memberikan pertimbangan bagi pemerintah setempat dalam pengawasan dan regulasi lingkungan kawasan pantai dan sekitarnya. Untuk penelitian ini, metode yang dilakukan adalah pemetaan karakteristik pantai, analisis sedimentologi dan mineralogi yang dilakukan terhadap 34 sedimen permukaan dasar laut. Pengambilan sampel sedimen permukaan dasar laut telah dilakukan oleh Tim Pusat Penelitian dan Pengembangan Geologi Kelautan (P3GL) pada tahun 2014. Hasil penelitian menunjukkan bahwa karakteristik pantai dan laut Wangi–wangi dan Kapota dipengaruhi oleh proses geologi yang telah berlangsung sejak Miosen Tengah. Morfologi dasar laut dicirikan oleh lereng landai di sekitar tepi pantai dan berubah dengan tegas menjadi curam ke arah laut lepas. Pada umumnya tekstur sedimen permukaan dasar laut terdiri atas pasir biogenik tersebar di sekitar garis pantai, dan mengisi di dalam terumbu koral. Jenis pantai sebagian besar berupa pantai pasir koral berwarna putih, pedataran pantai terumbu koral, serta morfologi pantai berupa takik. Kawasan pantai Wangi–wangi dan Kapota bisa dibagi ke dalam 4 (empat) zonasi lingkungan: Flat Plain (Zona I), Sandy Beach (Zona II), Limestone and Coral Reef (Zona III), dan Sedimentary Flat (Zona IV). Zona IV di area tengah antara Pulau Wangi–wangi dan Pulau Kapota merupakan area yang paling rentan mengalami kerusakan lingkungan akibat faktor alami dan aktifitas manusia. Kata kunci: zonasi, morfologi dasar laut, wisata, Wangi–wangi–Wakatobi, Provinsi Sulawesi Tenggara
ESTIMASI TEMPERATUR BAWAH PERMUKAAN BERDASARKAN KEHADIRAN MINERAL ALTERASI PADA SUMUR “X” LAPANGAN PANAS BUMI WAYANG WINDU, PANGALENGAN, KABUPATEN BANDUNG, PROVINSI JAWA BARAT Vina Oktaviany; Johanes Hutabarat; Agus Didit Haryanto
Buletin Sumber Daya Geologi Vol. 12 No. 2 (2017): Buletin Sumber Daya Geologi
Publisher : Pusat Sumber Daya Mineral Batubara dan Panas Bumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1677.132 KB) | DOI: 10.47599/bsdg.v12i2.39

Abstract

Temperatur merupakan aspek penting dalam sistem panas bumi untuk pengembangan panas bumi sebagai sumber energi. Penelitian ini dimaksudkan untuk mengetahui jenis litologi, mineral alterasi, tipe dan intensitas alterasi serta penyebarannya pada sumur X, dan bertujuan menentukan temperatur berdasarkan geotermometer mineral yang kemudian dibandingkan dengan data hasil pengukuran temperatur (T) sumur. Objek dalam penelitian ini berupa serbuk bor (cutting) dari sumur X yang dianalisis dengan metode petrologi, petrografi, dan XRD. Hasilnya menunjukkan, bahwa litologi sumur X terdiri atas andesit terubah, tuf litik terubah, dan tuf kristal terubah. Mineral alterasi yang berkembang didominasi oleh mineral alterasi dengan pH netral yang berupa kuarsa sekunder, kalsit, epidot, montmorilonit, illit, smektit, klorit, oksida besi, dan pirit, serta beberapa mineral ber-pH asam seperti kaolinit, kristobalit, anhidrit, dan haloysit. Berdasarkan asosiasi mineralnya, alterasi pada sumur X dibagi menjadi tiga tipe, yaitu alterasi argilik dengan perkiraan temperatur antara 150oC hingga 180oC, alterasi subpropilitik antara 150oC s.d. 220oC, dan alterasi propilitik antara 210oC s.d. 280oC. Secara umum, hasil geotermometer mineral ini menunjukkan data temperatur yang lebih tinggi dibandingkan data T berdasarkan pengukuran sumur.
A Rare Earth Oxides-Containing Internal Reference Material of Purified Monazite from Bangka Island Ronaldo Irzon; Agus Didit Haryanto; Kurnia Miharja
Majalah Ilmiah Pengkajian Industri Vol. 16 No. 2 (2022): Majalah Ilmiah Pengkajain Industri
Publisher : BRIN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/mipi.v16i2.4879

Abstract

Monazite mineral contains a sufficient composition of rare earth elements which are currently required widely in modern industries. Reference materials are needed to validate the measurement results, including the rare earth elements analysis. This study presents the processing of purified monazite from the PT Timah Metallurgical Unit in Muntok to become low-cost and rare earth oxides-containing internal reference material. Eight X-ray fluorescence measurements of four splits of the monazite were done for precision test and to establish its information values. The high CeO2 and LaO2 composition (>10%) implies the economic worth of the studied sample. Based on the acceptance criteria of RSDexperimental <10%, RSDexperimental ?66%xCVHorwitz, and Horrat <2, the concentration of fourteen analytes is acceptable to be set as information values. The studied monazite content resembles the other purified one of Myanmar. Its much lower phosphate composition signifies that the sample is more precious than refined monazites from Iran and Australia. Keyword: Monazite, Internal reference material, XRF, REE.
KARAKTERISTIK DAN TEMPERATUR BAWAH PERMUKAAN FLUIDA PANAS BUMI GUNUNG SLAMET DAN SEKITARNYA, JAWA TENGAH Khilal Khoiri Polanunu; Johanes Hutabarat; Agus Didit Haryanto; Dewi Gentana
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 6 No 2 (2021): Jurnal Geominerba - 2021
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.412 KB)

Abstract

Administratively the area of Mount Slamet is located in Central Java Province. The area has geothermal potential. The purpose of research is to find out the geochemical characteristics of water (type, origin, and equilibrium) and estimate of subsurface temperature (reservoir) geothermal by using methods of observation in the field and analysis of data from the geochemical laboratory results of hot springs. The results showed that the characteristics of the geothermal fluids type from MAPS and MAPP13 were bicarbonate water with the condition as pheripiral waters. MAPCB as a chloride sulfate water type with conditions as steam heated water, while MAPTH as a chloride water type in absorption of low B/Cl steam conditions with dominant Cl content become mature water. The origin of the MAPS, MAPCB, MAPP13 fluids are formed under conditions of absorption of high B/Cl steam with a dominant B content which are interpreted as originating from geothermal fluid, and when they moving to the surface the fluid interacts with the side rocks in its path. In addition, MAPS, MAPCB, MAPP13 are also included in the immature waters zone with high Mg content. This indicates that the three hot springs have intensive experienced mixing and dilution of shallow groundwater rich in Mg. Then, based on the difference in the concentration ratio of Cl/B in hot springs, the research area is interpreted have two reservoirs, namely reservoir A and reservoir B. Then, based on the calculation of the fluid geothermometer, it is estimated that reservoir A has temperature ranges from 149o -158oC, while reservoir B has temperature ranges from 89o -116oC.
TIPE DAN ESTIMASI TEMPERATUR AIR BAWAH PERMUKAAN DAERAH PANAS BUMI GUNUNG PAPANDAYAN, GARUT, JAWA BARAT Fauzan Thaha Assegaf; Agus Didit Haryanto; Johanes Hutabarat; Dewi Gentana
JURNAL GEOMINERBA (JURNAL GEOLOGI, MINERAL DAN BATUBARA) Vol 5 No 1 (2020): Jurnal Geominerba - 2020
Publisher : PPSDM Geominerba

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7006.495 KB)

Abstract

The location of the Papandayan study area is administratively located in the Cisurupan District, Regency Garut, West Java Province, was chosen as a research site because estimated to be an area that has geothermal potential. The purpose of this study is to determine the direction of the alignment of the structure, type of fluid, origin, and approximate subsurface temperature of the geothermal fluid.The method used in this research is DEM-SRTM image to determine the pattern of ridge and valley alignment that reflects the geological structure in the study area. Data processing of geochemical laboratory analysis results of geothermal fluid and remote sensing are supported by observing the phenomenon of landscape, geological structure and physical properties of geothermal manifestations on the surface in the field. The results of the alignment analysis of the SRTM-DEM image processed in the rosset diagram shows the alignment pattern (geological structure) in the study area tend to have North East-South West. The results of water chemical data plotting in the Cl-SO4-HCO3, Cl-Li-B and Na-K-Mg ternary diagrams show the characteristics, types of water in the study area as chloride-sulfate and sulfate types. The fluids move to the surface as an upflow and have been mixed and diluted with shallow ground water or meteoric water, and significant reaction occurs between the fluid and the wall rock which it passes. The results of the calculation by using water geothermometer, it can be estimated that subsurface temperature in the study area between 170°C-237°C.