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All Journal Bulletin of Scientific Contribution : Geology BERKALA SAINSTEK IJOG : Indonesian Journal on Geoscience Jurnal RISET Geologi dan Pertambangan Jurnal Teknologi Mineral dan Batubara Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Indonesian Journal on Geoscience Indonesian Journal on Geoscience Jurnal Geominerba Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Jurnal Teknologi Mineral dan Batubara Journal of Geosciences and Applied Geology

Yuyun Yuniardi

Fakultas Teknik Geologi, Universitas Padjadjaran

Author-ID : 2694936

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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KRONOSTRATIGRAFI CEKUNGAN KUTAI BAGIAN BAWAH, DAERAH BALIKPAPAN DAN SEKITARNYA, PROPINSI KALIMANTAN TIMUR -, Yuyun Yuniardi; -, Budi Muljana; -, Rahmat Fakhrudin
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Chronostratigraphy in lower Kutai Basin is very interesting to do research, in this area borders of chronostratigraphy need Paleontology Zone data and global tectonic. Chronostratigraphy in lower Kutai Basin divided into four part : Interval N2-N3, N4-N8, N9-N13, and N14-N21.

Potensi Airtanah Berdasarkan Nilai Resistivitas Batuan di Kelurahan Cangkorah, Kecamatan Batujajar, Kabupaten Bandung Barat Mohammad, Febriwan; Mardiana, Undang; Yuniardi, Yuyun; Firmansyah, Yusi; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 14, No 2 (2016): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Groundwater is water that contain under the soil or rock which located in subsurface layer. The resistivity method or geoelectricity using electrical properties of subsurface materials to obtain the anomalies. Aquisition data did with 2 line of 2-D resistivity and 10 point of 1-D resistivity. The result from 1-D resistivity are divided into three classification : First classification had range between 1 – 5 Wm which indicate the rock with low resistivity and shallow. This layer interpretated as clay from Saguling Lake sedimentation and this layer act as aquiklud layer. The second classification with range between 6 – 20 Wm indicated as medium resistivity and act as aquitard. The third classification with range more than 20 Wm indicated as high resistivity and act as aquifer with low productivity. From the 2-D resistivity survey, such as : Low resistivity range assosiated with shaly tuff lithology and sandy tuff, depth of the low resistivity range about 0 – 40 meters, Medium resistivity range had depth about 10 – 70 meters, act as aquifer due to have well porosity properties. High resistivity range depth is more than 70 meters until 100 meters assosiated with massif layer, bad porosity, and did not have rock pore, the lithology is collaboration between massif breccia with igneous component. Keyword : Geoelectricity, Resistivity, Batujajar, Groundwater, Aquifer Air tanah merupakan air yang terdapat di dalam lapisan tanah atau batuan yang terletak di bawah permukaan tanah. Metode resistivitas (resistivity) atau geolistrik memanfaatkan sifat kelistrikan material bawah permukaan untuk mendapatkan anomali. Pengukuran dilakukan sebanyak 2 lintasan geolistrik 2-D dan 10 titik pengukuran 1-D. Dari hasil pengukuran metode 1-D diperoleh 3 paket batuan yaitu : Paket lapisan batuan 1 dengan nilai tahanan jenis berkisar antara 1 – 5 Wm yang mengindikasikan batuan dengan resistivitas amat rendah dan dangkal. Lapisan ini diduga berupa lempung dari endapan danau Saguling. Lapisan ini diduga berperan sebagai akiklud. Paket lapisan batuan 2 dengan nilai tahanan jenis antara 6 hingga 20 Wm mengindikasikan batuan dengan resistivitas menengah dan bersifat sebagai akitar . Paket lapisan batuan 3 dengan nilai tahanan jenis antara lebih dari 20 Wm mengindikasikan batuan dengan resistivitas yang tinggi dan dapat berperan sebagai akifer dengan produktivitas rendah. Dan dari hasil geolistrik 2-D, yaitu : Rentang resisitivitas rendah kemungkinan berasosiasi dengan batuan dengan litologi tuf lempungan dan tuf pasiran memiliki kedalaman bervariasi antara 0-40 meter, Rentang resistivitas menengah memiliki kedalaman bervariasi sekitar 10-70 meter. Porositas paket batuan ini diperkirakan baik, dan dapat berperan sebagai akifer, Rentang resisitivitas tinggi ini berasosiasi dengan rentang kedalaman yang bervariasi mulai dari 70 meter hingga kedalaman lebih dari 100 meter berasosiasi dengan Lapisan keras, massif, porositas buruk dan tidak dapat menyimpan air di antara pori-pori batuannya, berupa perpaduan antara breksi padu dengan komponen batuan beku. Kata kunci : Geolistrik, Resistivitas, Batujajar, Airtanah, Akifer

KARAKTERISTIK KETEKNIKAN TANAH DAN HUBUNGANNYA DENGAN PENGEMBANGAN WILAYAH DI KAWASAN PENGEMBANGAN TERPADU - JATINANGOR, KABUPATEN SUMEDANG, JAWA BARAT -, Zufialdi Zakaria; -, Yuyun Yuniardi; -, Irvan Sophian
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Soil in research areal consist of CH (clay, high plastisitas) and MH. (silt, high plastisitas). Soil activity at area of Jatinangor is vary from low activity to high. But in general soil activity is hidh-medium. Activity number by Seed is A = 0.40 until 0.86 with nature mineral of kaolinitic until ilitic. Stability of slope can be designed as according to slope-stability design. At exposition slope, slope with angle 45o, two terrace and ground water level at - 2 M, high of slope 5 M and level off 5 M, Safety Factor = 2.094. Soil bearing capacity for square, circular & continuous foundations have medium-high activity show relationship that: Increasing of soil activity value cause decreasing of value of soil bearing capacity. Safety Factor of slope and soil bearing capacity is very supporting of environmental aspect in Jatinangor development area. Geological evaluation of development area is required to study both aspect (slope safety and bearing capacity).Environmental management is required before the rains arrive, because ground water rate will increasing at rainfall condition. It is required to manage negative impact. It is required to anticipate or eliminated its impact, or generating positive impact to be managed by improving it. Environmental monitoring is required to be instructed as anticipatory effort of damages or effect of negative impact.

PENYELIDIKAN PENDUGAAN GEOLISTRIK UNTUK PENELITIAN AIR TANAH, DI ASRAMA RINDAM - SENTANI, KABUPATEN JAYAPURA, PROPINSI PAPUA -, Geni Dipatunggoro; -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 11, No 2 (2013): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Geo-electric investigation is done at Asrama Rindam areal, Sentani Resort, Jayapura Regenc, Papua Province. The investigationis required to detection of rock and subsurface condition. Methode of geo-electric to support for groundwater investigation to use the soldier need at the Asrama Rindam, Sentani Resort, The vertical layer are layer-1 as the soil, layer-2 as tufaceous brecia, laye-3 as tufaseous sand, layer-4 as tufaseous brecia, layer-5 as volcanic brecia, layer-6 as tufaseous sand, and layer-7 as volcanic brecia. The rock layer groundwater potencial or reservoar are tufaseous sand at the 10 meter and 49 meter depth.

DEPOSITIONAL ENVINRONMENT AND PALEOCURRENT THE MIDDLE OF WARUKIN FORMATION BASED ON SEISMIC AND WELL LOG DATA IN NORTH-EAST PART BARITO BASIN, SOUTH KALIMANTAN Yuniardi, Yuyun; Mardiana, Undang; Mohammad, Febriwan; Nur, Andi Agus; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 18, No 3 (2020): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v18i3.31550

Explorations in the Barito basin has started nearly 100 years and was marked by the discoveryof the Tanjung Field in 1938 (Maso at all 1993). The middle of Warukin Formation is one of thereservoir formation in the Barito basin of North-Northeast. Barito Basin is located betweenSundaland in the west and Meratus in the east (Satyana, Awang.1994). An understanding of thedepositional environment and paleo-current will be very useful for the exploration and fielddevelopment optimization of oil and gas. The data used in this researcher seismic 3D data and well data. From the existing data createdseismic facies maps and correlation maps well with the markers used datum is the Top FormationMiddle Warukin. Downlap termination pattern found on the seismic line 75H - 37 at the lower limit indicates thetime of formation of this facies occur sea level rise. Configuring the parallel reflection pattern -subparallel and divergent indicate the depositional environment is shelf / platform or deltaplatform (Serra, O, 1990). Coarsening upward to fining upward pattern relatively evolved fromwireline log analysis, in which a pattern is formed on the shore face transgressive delta thenserrated pattern formed in the shelf. Based on the seismic data and log data as well as supportingdata from the regional geology of the Barito Basin, it can be interpreted that the study area isformed on the delta depositional environment - shelf. Paleo-current study area can be determined based on seismic facies maps and regionalconditions Barito Basin. Of seismic facies maps can be interpreted Paleo-current direction isrelative to the south - west with relative sediment supply from the north - east.

KARAKTERISTIK ENDAPAN VULKANIK SUB DAS CIGOMBONG LERENG TIMUR GUNUNG SALAK MUTAQIN, DEDEN ZAENUDIN; Mohammad, Febriwan; Mardiana, Undang; Yuniardi, Yuyun; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 17, No 2 (2019): Bulletin of Scientific Contribution : GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRAKMetode stratigrafi yang digunakan pada batuan vulkanik serupa dengan mempelajari stratigrafi pada batuan sedimen, yaitu membuat korelasi, urutan secara vertikal berdasarkan waktu, menentuakan perubahan fasies dan sejenisnya. Penelitian Stratigrafi rinci mengenai daerah vulkanik masih jarang dilakukan. Hal ini biasanya dikarenakan oleh kondisi lapangan yang sulit ditempuh. Penelitian ini berlokasi di Sub DAS Cigombong Lereng Timur Gunung Salak untuk mengetahui perubahan litologi baik secara lateral maupun vertikal. Permasalahan dipecahan dengan Observasi lapangan. Data lapangan berupa lintasan-lintasan stratigrafi berdasarkan daerah cekungan pengaliran. Berdasarkan fasies vulknik dari keseluruhan analisis , terdapat 6 kelompok fasies dari muda ke tua yaitu endpan aliran laharik gunung salak, endapan aliran lava 2 gunung salak, endapan aliran lava 1 gunung salak, endapan aliran piroklastik scoria 3 gunung salak endapan aliran lava 1 gunung salak, endapan aliran piroklastik scoria 2 berasosiasi dengan endapan Seruakan gunung salak, dan endapan aliran lava 1 gunung salak, endapan aliran piroklastik scoria 1 pra gunung salak.Kata kunci: Cigombong, Fasies Gunung Api, Salak, VulkanikABSTRACTStratigraphy in volcanic area have similar treatment with sedimentary rock study process, i.e. make correlations, order vertically based on time, determine changes in facies and the like. Detailed stratigraphic research on volcanic areas is rarely done. This is usually caused by field conditions that are difficult to go through. This research is located in the Cigombong East Slope Sub-watershed of Mount Salak to determine lithological changes both laterally and vertically. The problem is solved by field observations. Field data in the form of stratigraphic trajectories based on drainage basins. Based on the Vulcanic facies of the whole analysis, there are 6 facies groups from young to old, namely Salak mountain flow depletions, Salak flow 2, Salak flow 1, pyroclastic flow, scoria 3 Salak mountain deposition, lava flow 1 Salak mountain, scoria pyroclastic flow sediment 2 associated with Salak mountain excavation, Salak mountain lava flow 1, pyroclastic flow precipitate 1 Salak mountain.Keyword: Cigombong, Volcanic Facies, Mt. Salak, Volcanic.

ZONASI PALEONTOLOGI CEKUNGAN KUTAI BAGIAN BAWAH, DAERAH BALIKPAPAN DAN SEKITARNYA, PROVINSI KALIMANTAN TIMUR -, Yuyun Yuniardi; -, Rahmat Fakhrudin; -, Lia Jurnaliah
Bulletin of Scientific Contribution Vol 8, No 2 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Fossil of Foraminifera, Nannoplankton, and Pollen were got into rock sample in lower Kutai Basyn and very interesting to do research. Paleontology zone were made for deliniation of rocks formation in lower Kutai Basyn. Paleontology zone divided into three part : Foraminifera zone, Pollen zone, and Nannoplankton zone.

POTENSI AKUIFER KAMPUS ARJASARI BERDASARKAN PENGAMATAN NILAI TAHAN JENIS BATUAN Mohamad, Febriwan; Mardiana, Undang; Yuniardi, Yuyun; Nur, Andi Agus; Alfadli, Muhammad Kurniawan
Bulletin of Scientific Contribution Vol 15, No 2 (2017): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRACTGeoelectric measurement was done in order to obtain the presence, depth, thickness, quantity and distribution of aquifers in the study area. Geoelectric was done by applying 1-D Schlumberger configuration (DC sounding). Rock layer with a resistivity value ranges <20 μm indicates rocks with low resistance values, dominates the surface until 50 meters depth with varying thickness. This layer lithology thought to be composed of weathered soil, fine tuff and lapilli tuff. This layer is assumed to act as aquiclude, porous media that can store water but acts as barrier to the flow of groundwater. This lithology group can be filled by water during the rainy season, but in dry season contain very small amount of water. Rock layer with resistivity value ranges between 20 μm - 60 μm interpreted as coarse tuff intercalating with fine tuff, founded at 75 meters depths below the surface. Rock layers with high resistance values (> 60 μm), founded more than 75 meters in the north area, assumed to be volcanic breccia with tuff as matrix, and have small potential to act as aquifer. Keyword: Geoelectric, Schlumberger, Aquifer, Resistivity ABSTRAKPengukuran geolistrik yang dilakukan dalam upaya untuk mendapatkan kehadiran, kedalaman, ketebalan, jumlah dan penyebaran akuifer. Hasil pengukuran geolistrik (Sounding) dengan konfigurasi Schlumberger Kelompok batuan dengan nilai tahanan jenis berkisar antara <20 Wm yang mengindikasikan batuan dengan nilai tahanan jenis rendah mendominasi permukaan hingga kedalaman 50 meter dengan ketebalan bervariasi. Lapisan ini diduga memiliki litologi penyusun terdiri atas tanah lapukan, tuf halus dan tuf lapili. Lapisan ini diduga berperan sebagai akiklud, yaitu media berpori yang dapat menyimpan air tetapi tidak dapat mengalirkan airtanah yang dapat terisi oleh air pada musim hujan, namun pada musim kering tidak mengandung air. Lapisan batuan dengan nilai tahanan jenis antara 20 Wm - 60 Wm diinterpretasi litologi tuf kasar berselingan dengan tuf halus, berada pada kedalaman mulai 75 meter di bawah permukaan. Lapisan batuan dengan nilai tahanan jenis tinggi (>60 Wm), mulai di kedalaman lebih dari 75 meter di bagian utara diperkirakan breksi vulkanik dengan matriks berupa tuf, dan memiliki potensi kecil sebagai akuifer. Kata Kunci: Geolistrik, Schlumberger, Akifer, Resistivitas

PETROLEUM SYSTEM CEKUNGAN KUTAI BAGIAN BAWAH, DAERAH BALIKPAPAN DAN SEKITARNYA, PROPINSI KALIMANTAN TIMUR -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v10i1.8274

Oil and gas potential in Lower Kutai Basin were probably exist, those condition have checked from well petroleum system to support oil and gas accumulation in this area. Data integration of source rock, reservoir rock, cap rock, trap assotiation, and migration system in Lower Kutai Basin could be doing advance research to proving oil and gas accumulation.

LITOSTRATIGRAFI CEKUNGAN OMBILIN BERDASARKAN INTERPRETASI CITRA SATELIT -, Yuyun Yuniardi
Bulletin of Scientific Contribution Vol 8, No 1 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Stratigraphy of Ombilin Basin area was interesting for make some research. The research did use remote sensing interpretation to made geological interpretation map which is containing information about lithostratigraphic unit distribution in Ombilin Basin area. LithoStratigraphic of Ombilin Basin from old to young were Brani Formation, Sangkarewang Formation, Sawahlunto Formation, Sawahtambang Formation, and Ombilin Formation.

Co-Authors Abdurrokhim ⠀ Abdurrokhim, . Adi Hardiyono Alfadli, Muhammad Kuniawan Andi Agus Nur Andi Agus Nur, Andi Agus Aruan, Immanuel Hareanto Asep Bahtiar Purnama Asep Bahtiar Purnama, Asep Bahtiar Budi Muljana Deden Zaenudin Mutaqin Edi Tri Haryanto, Edi Tri Emi Sukiyah Febriwan Mohamad Febriwan Mohammad Febriwan Mohammad, Febriwan Fikri Abdullah Fikri Abdullah, Fikri Geni Dipatunggoro -, Geni Dipatunggoro Gilang Firmansyah, Gilang Hendarmawan Hendarmawan Hendarmawan, . Irvan Sophian -, Irvan Sophian Iyan Haryanto Khoirullah, Nur Lia Jurnaliah Muhammad Kurniawan Alfadli Nanda Natasia Nurdrajat Nurdrajat Panji Ridwan Puteri Rasdita M. Verdiana, Puteri Rasdita M. Raden Irvan Sophian Rahmat Fakhrudin -, Rahmat Fakhrudin Ridwan, Panji Sendjaja, Yoga A. Silti Salinita Silti Salinita, Silti Undang Mardiana Vijaya Isnaniawardhani Yusi Firmansyah, Yusi Zufialdi Zakaria

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