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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Buletin Sumber Daya Geologi Kumawula: Jurnal Pengabdian Kepada Masyarakat Eduvest - Journal of Universal Studies Journal of Geosciences and Applied Geology Geoid - Journal of Geodesy and Geomatics

Nana Sulaksana

Faculty of Technical Geology, Padjadjaran University, Jatinangor 45363

Author-ID : 390789

Aerospace Engineering Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Neuroscience Physics Social Sciences

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The Evolution of Gajahmungkur Paleovolcano, Wonogiri, Central Java, as A Reference to Revize the Terminology of âOld Andesite Formationâ Syafri, Ildrem; Sudradjat, A.; Sulaksana, Nana; Hartono, G.
Indonesian Journal on Geoscience Vol 5, No 4 (2010)
Publisher : Geological Agency

DOI:Â 10.17014/ijog.v5i4.109Gajahmungkur is a Tertiary paleovolcano located in Wonogiri Regency, Central Java. The volcanic product of this volcano are widely distributed and composed of important elements of the stratigraphic sequence in the Southern Mountain area. The volcanic products so far have been simply classified as âOld Andesite Formationâ which apparently is not in line with the stratigraphic code and the Indonesian Stratigraphic Code. The description of paleovolcano therefore might contribute to the revision of the âOld Andesite Formationâ. The evolution of Gajahmungkur paleovolcano commenced with the formation of a submarine volcano, and then at the second phase a composite volcano emerged above sea level forming a volcano island. The third phase was the self destruction resulting in a formation of a caldera. Pumiceous components dominated the products. At the fourth phase, the activities began to decline producing more basaltic rocks. The statistical analysis of the interrelation between various physical properties of the clastic rocks leads to the identification of volcanic facies and the location of the paleovolcano vent.

RESPONSE OF STABLE OVERALL SLOPE GEOMETRY OF OPEN PIT COAL MINE IN WARUKIN FORMATION TO DEWATERING AND PEAK GROUND SEISMIC IN SOUTH KALIMANTAN, INDONESIA Oscar, Agus W; Muslim M.Sc., Ir. H. Dicky; Sulaksana, Nana; Hirnawan, Febri
Buletin Sumber Daya Geologi Vol 11, No 1 (2016): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Understanding of the response of the mine slope stability is very important regarding the safety of life and investment / productivity / environment, as anticipation of landslide prevention based on the latest research. Mine slope behavior previously discussed widely in terms of the response due to dewatering and seismic (Peak Ground Acceleration) as well through verification. This paper aims to obtain a broad dimension of design criteria that are not only unstable slopes, but the slope is stable under various conditions of the rock mass saturation (dewatering) and seismic condition. Response of slope stability per geotechnical rocks unit from different formations or any engineering formation as a result of environmental influences, for example, the same quake, will be different. This means that the geometry of the same slope in other formation will have different stability conditions (safety factor of the slope) due to the same seismic acceleration. This is also similar due to dewatering. The method used for this study is the deductive-probabilistic method with a hypothetical verification approach. The Standard statistical analysis is used to test the data normality and homogeneity, average and independent differences, as well as regression-correlation test. The research results show that dewatering activitycan decrease ground water level (GWL/MAT) of the slope, so the durability of sliding along the sliding plane is reduced (increasing slope safety factor). At the same time earthquake reduces shear strength and increases driving force, so the safety factor of the slope suddenly downs. Slope stability decreased due to the earthquake, but dewatering improves slope stability. Thus, the slope in dewatering conditions will be kept stable through simulation to anticipate earthquake.

PENENTUAN KAWASAN PERTAMBANGAN BERBASIS SEKTOR KOMODITAS UNGGULAN SUMBERDAYA NIKEL KABUPATEN KONAWE DAN KONAWE UTARA PROVINSI SULAWESI TENGGARA Nursahan, Iwan; Isnaniawardhani, Vijaya; Sulaksana, Nana
Buletin Sumber Daya Geologi Vol 8, No 2 (2013): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Kabupaten Konawe dan Kabupaten Konawe Utara merupakan bagian dari Kawasan Strategis Nasional (KSN) Soroako dan sekitarnya, yang dicanangkan sebagai wilayah dengan komoditi unggulan pertambangan nikel. Penentuan kawasan pertambangan berbasis komoditi unggulansumberdaya nikel ini menggunakan pendekatan Satuan Genetika Wilayah (SGW) dan memanfaatkan Teknologi Sistem Informasi Geografis (SIG).Valuasi matrik holistik SGW menghasilkan 204 nilai SGW di Kabupaten Konawe dan 248 nilai SGW di Kabupaten Konawe Utara. Valuasi matrik holistik tersebut, menunjukkan adanya keterkaitanÂ aspek potensi dan kendala wilayah terhadap total nilai valuasi SGW. Berdasarkan valuasi SGW dan analisis SWOTÂ kawasan pertambangan prioritas I, maka dapat direkomendasikan bahwa SGW Pedataran Patahan Batuan Ultramafik daerah Langikima dan Wiwirano serta SGW Pedataran Batuan Ultramafik daerah Asera, Andowia, Wiwirano dan Molawe sebagai Kawasan Andalan Pertambangan Nikel, dengan total sumberdaya sekitar 1,14 Milyar Ton, dan nilai valuasi skenario dikembangkan/ditambang berkisar 248 hingga 298.

PROFIL ENDAPAN LATERIT NIKEL DI POMALAA, KABUPATEN KOLAKA, PROVINSI SULAWESI TENGGARA Kamaruddin, Hashari; Indrakususma, Riko Ardiansyah; Rosana, Mega Fatimah; Sulaksana, Nana; Yuningsih, Euis Tintin
Buletin Sumber Daya Geologi Vol 13, No 2 (2018): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Geologi daerah Pomalaa merupakan bagian dari batuan ultramafik Ofiolit Sulawesi Timur di lengan tenggara Sulawesi. Di daerah tersebut endapan laterit nikel Pomalaa terbentuk dari pelapukan batuan asal ultramafik yang didominasi oleh harzburgit terserpentinisasikan dan memiliki karakteristik tipe endapan laterit nikel hydrous Mg silicate. Lateritisasi terbentuk pada morfologi perbukitan bergelombang rendah dengan sudut kelerengan berkisar 10Â° sampai dengan 25Â°. Proses lateritisasi berlangsung dengan baik terutama pada topografi yang cenderung lebih landai yaitu 10Â° sampai dengan 15Â°, yang memungkinkan terbentuknya lateritisasi yang cukup dalam dengan zona saprolit yang tebal.

ALTERASI HIDROTERMAL GUNUNG RENDINGAN BERDASARKAN ANALISIS PETROGRAFI DAN X-RAY DIFFRACTION (XRD) Gentana, Dewi; Sulaksana, Nana; Sukiyah, Emi; Yuningsih, Euis Tintin
Buletin Sumber Daya Geologi Vol 13, No 3 (2018): Buletin Sumber Daya Geologi
Publisher : Buletin Sumber Daya Geologi

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Daerah penelitian terletak di daerah panas bumi Gunung Rendingan, Kabupaten Tanggamus, Provinsi Lampung. Daerah penelitian dipengaruhi oleh Sesar Semangko, mempunyai pola sesar berarah Barat Laut -Tenggara dan Timur Laut â Barat Daya. Penelitian bertujuan untuk mengetahui himpunan mineral alterasi berdasarkan analisis petrografi dan X-Ray Diffraction (XRD). Analisis petrografi digunakan untuk mengetahui mineral alterasi sebagai indikator temperatur dan fluida hidrothermal di daerah penelitian. Analisis XRD dilakukan untuk mengindentifikasi jenis mineral lempung. Berdasarkan analisis petrografi dan XRD pada batuan permukaan di daerah penelitian menghadirkan mineral kelompok lempung yang terdiri dari smektit, ilit, serisit dan kaolinit. Hasil analisis petrografi dan XRD terhadap serbuk bor (cutting) dari sumurÂ XD-1, XD-2 dan XD-3 memperlihatkanÂ himpunan mineral alterasi hidrotermal smektit-kaolinit-serisit dan ilit-epidot pada sumur XD-1, himpunan mineral serisit-smektit, smektit-ilit danÂ ilit-epidot pada sumur XD-2, himpunan mineral smektit-kaolinit dan ilit-smektit-epidot pada sumur XD-3. Berdasarkan himpunan mineral alterasi tersebut dapat diperkirakan temperatur bawah permukaan di daerah penelitian berkisar 150Â°-300Â°C pada kedalaman 700 â 1900 mKu sebagai zona reservoir. Kehadiran mineral kalk-silikat yaitu epidot bersama wairaikit dan prehnit sebagai indikator zona reservoir memiliki temperatur yang baik. Batuan di daerah penelitian memiliki permeabilitas yang baik dengan kehadiran mineral adularia.

Gold mineralization in the Neo-Tectonic Region of Honje Formation and Cipacar Formation Usman, Dudi Nasrudin; Sulaksana, Nana; Hirnawan, Febri; Haryanto, Iyan
Journal of Geoscience, Engineering, Environment, and Technology Vol 3 No 4 (2018): JGEET Vol 03 No 04 : December (2018)
Publisher : UIR PRESS

The gold ore mineralization region is a zone of mineralization which is inseparable from the role of geological structures, one of which is fracture. The Cibaliung and surrounding areas are epithermal gold mineralization zones, in this region there are two main mineralized zones, namely Cibitung Zone and Cikoneng Zone. It has almost the same characteristics where the fractures formed are quite large so that it influences the class of rock mass, but the other side is the presence of many fractures which make it easier for scattered mineralization to fill the fracture so that the formed vein is thick enough. This study aims to analyze the relationship of Rock Mass Rating (RMR) and Rocks Quality Design (RQD) to tectonic movements in the region to prove the neo-tectonic phenomena in the Honje Formation and Cipacar Formation using surface mapping methods. The methods used are rock type mapping, rock structure mapping, mapping and RQD measurements, rock descriptions and rock sample collection. All the data obtained are then verified and validated before processing and statistical tests. Statistical tests are carried out to ensure an analysis with a basis that is recognized by all parties. Both formations above have different ages, which is for the Honje Formation (Andesite Lava) with the final Miocene age and Cipacar Formation (tuff) at the age of Pleistocene. The findings of this study are the two formations measured by RQD and RMR on rock cracks and surrounding conditions; the RMR observation station made around 125 points in the Honje Formation and 117 points in the Cipacar Formation. The R2 value of the RMR value of the Honje Formation and the Cipacar Formation shows a positive relationship of 67%; The biggest RMR value is in Tuff rock. In addition, the relation between RMR Andesite Lava Value and RMR Tuff Value is done with T-Test between Andesite Lava and Tuff where the result shows no difference of mean between RMR Andesite Lava and RMR Tuff Value. Therefore, the tectonic processes that occur in the Honor Andesite Lava Unit of Honje Formation with the preceding position are formed, and the older age at the end of the Miocene age that is blocked by the field of unconformity experienced Continuity on Cipacar Formation Tuff Unit with the upper position that is formed after Honje Formation and younger age in Pleistocene. The continuation of the tectonic process proves the existence of active tectonic activity better known as Neo-tectonic.

Hydrochemistry and Characteristics of Groundwater: Case Study Water Contamination at Citarum River Upstream Hadian, Mohamad Sapari Dwi; Waliana, T Yan; Sulaksana, Nana; Putra, Dewandra Bagus Eka; Yuskar, Yuniarti
Journal of Geoscience, Engineering, Environment, and Technology Vol 2 No 4 (2017): JGEET Vol 02 No 04 : December (2017)
Publisher : UIR PRESS

Rancaekek and Sayang area, West Java, are the area where many industrial factories are located.Thus, the region becomes the targeted destination for industrial development.The  population in the area is rising due to the growth of industries causing the regional development becomes uncontrollable. In addition, the constant increment of waste and also poor-coordinated disposal systems may result in groundwater contamination in the areas. The rapid growth of the area increase the need for groundwater as well as the need for more research about contamination at Rancaekek and Sayang. The research aims to explore the spread of groundwater contamination in the area. The research method is carried out based on the analysis of Geological Mapping, Hydrogeological Mapping and chemical characteristics of the groundwater in the area. Chemical analyses of the groundwater were conducted through laboratory test of groundwater samples at specific spots of dug wells. The lab test results were further analyzed to determine the contamination zone. The findings reveal that the distribution of contamination in the area follow the shallow ground water flow patterns, the water contamination contains heavy metal and there is degradation of soil fertility. The findings suggest the stakeholders to delineate the contaminated area, and increase the dissemination of environmental awareness.

Analisis Multi Raster SRTM, Radarsat dan Landsat untuk Karakterisisasi Morfo-struktur dari Geometri Sesar di Daerah Binuang, Kalimantan Selatan Jamal, Jamal; Sulaksana, Nana; Sukiyah, Emi; Andriana Sendjaja, Yoga
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

The Binuang area and its surroundings are genetically structural landforms which characterized by cuesta ridge line with curve lineaments pattern on northeast-southwest direction. Geomorphological approach were carried out to determine structural geometry of geological surface using qualitative and quantitative approach on multiple map analysis of remote sensing data. The result of quantitative analysis on elevation data are used to classify heights, slope shape and steepness, lineaments, drainage, and slope aspect. Optical images were classified to determine lithological pattern and boundaries through analysis of band ratios, decorrelation stretch, principal component, and spatial enhancement. The research area are classified into eight class of structural landforms, depicting deformations that occured in western flank of Meratus Mountains. The surface pattern indicates the influence of compressional stress, shown by fold belt with longitudinal characteristic and fault-bounded anticlines on northeast-southwest axis. The formation of main structure pattern on research area was compared with that on strike-slip fault analog model. The resulting correlation factor, R=0.932, shows that both of them are highly correlated. In conclusion, surface structure can possibly form another variation of thrusted mountain belt, such as thrust-dominated restraining bends.Keywords: landsat, SRTM, morphostructure, morphometry, rhomboidal pattern, Meratus.

SOSIALISASI PENGELOLAAN SAMPAH DI RANCAEKEK KULON, KABUPATEN BANDUNG, JAWA BARAT Sulaksana, Nana; Zakaria, Zufialdi; Raditya Rendra, Pradnya Paramarta; Sulastri, Murni
Kumawula: Jurnal Pengabdian Kepada Masyarakat Vol 7, No 2 (2024): Kumawula: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/kumawula.v7i2.45957

Rancaekek Kulon merupakan salah satu desa di Kecamatan Rancaekek yang memiliki permasalahan sampah. Permasalahan sampah yang terjadi disebabkan oleh rendahnya kesadaran masyarakat dan terbatasnya Tempat Pembuangan Sementara (TPS) di wilayah setempat. Hal tersebut mengakibatkan di sebagian pingir jalan desa dapat ditemukan tumpukan sampah yang tidak dikelola dengan baik. Selain itu, terbatasnya TPS juga menyebabkan masyarakat memilih untuk membakar sampah rumah tangga secara mandiri. Oleh karena itu, kegiatan sosialisasi terkait pengelolaan sampah perlu dilakukan untuk mendorong dan memotivasi masyarakat lebih peduli terhadap kondisi lingkungan serta mendorong pemerintah daerah setempat untuk membantu dalam penyediaan TPS yang memadai. Sosialisasi dilakukan untuk menghimbau masyarakat hidup bersih serta menjaga lingkungan setempat dengan tidak membuang sampah sembarangan serta melakukan pengelolaan sampah secara baik melalui proses pemilahan dan pemilihan sebelum sampah diangkut 302 Kumawula : Jurnal Pengabdian Kepada Masyarakat 2024 menuju TPS. Hasil kegiatan menunjukkan bahwa pada dasarnya masyarakat ingin hidup bersih dan sehat. Namun demikian, kurangnya kesadaran serta keterbatasan TPS menjadi kendala yang perlu diselesaikan. Oleh karena itu, sosialisasi ini bermanfaat sebagai salah satu upaya untuk mendorong masyarakat dan pemerintah setempat untuk bersama-sama saling membantu menjaga lingkungan agar tercipta lingkungan yang bersih dan sehat.

Geo-Environment Aspects Assessment Applied In Land Stability Determination Of A Disaster-Prone Area: A Case Study Around The Lembang Active Fault Zone, On The Western Part Of Bandung Basin, Indonesia Iskandarsyah, Teuku Yan Waliana Muda; Brilian, Ciria Humanis; Trisnadiansyah, Mochamad Ridfan; Listiawan, Yudhi; Barkah, M. Nursiyam; Sulaksana, Nana; Hendarmawan, Hendarmawan
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 3 (2024): JGEET Vol 09 No 03 : September (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.3.18062

Rainfall, landforms, lithology or soil characteristics, and geological structures are geo-environment aspects that might be used to assess stability of the land in a disaster-prone area, e.g. in a case of study around the Lembang active fault zone of the western part of Bandung Basin, Indonesia. In this study, such geo-environment aspects were weighted and scored constantly in five class of value and importance, due to its influence on the land stability. After this scoring method applied, firstly, a land capability of the research area in relation to disaster potential will be recognized and used to analyze its land stability. According to such analyses, the study area can be divided into two zones of land stability, i.e. (i) moderate area which dominates the research area, and (ii) non-stable or unstable area near Lembang active fault zone. The dominant moderate and unstable area show that the fault zone has still widely affected the surroundings landscape and its physical characteristics. In fact, the current evaluation of existing landuse show that the development has been carried out intensively on these areas. It indicates that the development of the area is contituted as a high risk activity. Therefore, in this case, a good spatial planning or an environmental good governance must be applied appropriately in such disaster-prone area.

Co-Authors A. Sudradjat ACHMAD RIFAI Achmad Sjafrudin, Achmad Adjat Sudrajat Alam, Boy Yoseph C. S. S. S Andi Makawaru Yasin, Andi Makawaru Ando, Ferry Andriana Sendjaja, Yoga Asep Nursalim, Asep Bombom Rachmat Suganda, Bombom Rachmat Boy Yoseph C.S.S.S. Alam, Boy Yoseph C.S.S.S. Brilian, Ciria Humanis Burhanidunnur, Muhammad Daliman, Shaparas Binti Dewandra Bagus Eka Putra, Dewandra Bagus Eka Dicky Muslim Dudi Nasrudin Usman Emi Sukiyah Euis Tintin Yuningsih Febri Hirnawan Fikri Abdulah, Fikri G. Hartono Gentana, Dewi Hendarmawan Hendarmawan, Hendarmawan HS, Karyono Ildrem Syafri Indrakususma, Riko Ardiansyah Isandarsyah, Teuku Yan Waliana Muda Iskandarsyah, Teuku Y. M. W. Iskandarsyah, Teuku Yan Waliana Muda Iyan Haryanto, Iyan Jamal Jamal Johanes Hutabarat Kamaruddin, Hashari Khoirullah, Nur M. Nursiyam Barkah, M. Nursiyam Mega Fatimah Rosana Mohamad Sapari Hadian Muhammad Kurniawan Alfadli Muttaqin, Mochamad Aufar Novi Triany Nurasa , Heru Nurohim, Dede Nursahan, Iwan Oscar, Agus W Persulessy, Janeth Angel Pradnya P. Raditya, Pradnya P. Pradnya Paramarta Raditya Rendra Pradnya Raditya Rendra, Pradnya Raditya Princessca, Channia Puguh Setiyanto, Puguh Rendra, P Paramarta Raditya Rita Yulianti, Rita Setyorini, Dyah Ayu Sipahutar, Sumahang R. Sri Wahyuni Suherman Dwi Nuryana Sulastri, Murni Syamsul Irham, Syamsul T Yan Waliana, T Yan Trisnadiansyah, Mochamad Ridfan Vijaya Isnaniawardhani Waliana, Teuku Yan Yudhi Listiawan Yuniarti Yuskar, Yuniarti Zufialdi Zakaria, Zufialdi

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