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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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (890.659 KB) | DOI: 10.24273/jgeet.2018.3.4.1852

Abstract

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.
Perkembangan Fasies Sedimen Formasi Mamberamo Berumur Miosen Akhir-Pliosen di Cekungan Papua Utara Mamengko, David Victor; B.Sendjadja, Yoga; Mulyana, Budi; Panggabean, Hermes; Haryanto, Iyan; Lelono, Eko Budi; Musu, Juwita Trivianty; Panuju, Panuju
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 1 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.459 KB) | DOI: 10.33332/jgsm.geologi.20.1.37-47

Abstract

North Papua Basin is a fore arc basin located in northern coastal of Papua Island. This basin filled by Middle-Upper Miocene turbidite sediment and overlied by Upper Miocene – Quarternary clastic sediment. Upper Miocene – Quaternary clastic sediments (Mamberamo Formation) composed by interbedding conglomerate, sandstone and shale as molasses deposit. A detailed stratigraphic study was performed to identify facies and its association of the Mamberamo Formation to that give a new perspective on the characteristics and development of facies succession of Lower Mamberamo Formation. Result  shows that the Lower Mamberamo Formation consists of three facies: A) cross bedding sandstone (subtidal), B) heterolothic silty shale (intra-tidal), C) carbonaceous shale (supra-tidal) deposited on Late Miocen to Plio-Pleistocene during centra range orogeny (syn-orogeny) as molasses deposits.Keywords: Fore arc basin, North Papua Basin, Mamberamo Formation, molasse deposits.
Biomarker Composition of Some Oil Seeps from West Sulawesi, Indonesia Sutadiwiria, Yarra; Hamdani, Ahmad Helman; Sendjaja, Yoga Andriana; Haryanto, Iyan; Yeftamikha, Yeftamikha
Indonesian Journal on Geoscience Vol 5, No 3 (2018)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (764.218 KB) | DOI: 10.17014/ijog.5.3.211-220

Abstract

DOI: 10.17014/ijog.5.3.211-220A suite of oil seep samples collected from the Lariang and Karama Basins, West Sulawesi, Indonesia, have been analyzed using GC and GCMS techniques. Their biomarker compositions have been used to reveal the likely source rock that produces oil. These oil seep samples contain a range in both the concentration of hydrocarbons present and certain level of biodegradation experienced. All sterane m/z 217 data display a familiar pattern of steranes with carbon numbers from 27 to 29 together with pregnane and homo-pregnanes, including rearranged steranes. Triterpane (m/z 191) data show a moderate content of tricyclic terpanes (Tri/C30H), medium to high ratio of norhopane/hopane (C29/C30), and medium to high abundant land plan marker such as resin bicadinanes(Bic/C30H) and oleananes (Ol/C30H). The presence of high abundant oleananes in these samples has been interpreted as the evidence for a marine influence during early diagenesis that may occur by marine or via re-deposition of peat organics in marine sediments. Hence, these results state that the organic matter facies for their source rock oil seep samples from the West Sulawesi region are detected as mixed between allochthonous macerals from typical terrestrial higher plants transported into the basin from distal swamps and soils and some marine organic matter.
Morphotectonic Characteristics Of Cisadane Watersshed Based On Satellite Images Analysis Mawardi, Sonny; Sukiyah, Emi; Haryanto, Iyan
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 3 (2019): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.637 KB) | DOI: 10.33332/jgsm.geologi.20.3.%p

Abstract

Cisadane Watershed is one of the most rapidly growing areas and infrastructure development, and has developed as a residential, industrial, administrative centers and other economic activities. The purpose of this paper is to use remote sensing satellite imageries to identify the morphotectonic characteristics of the Cisadane watershed both qualitatively and quantitatively. Processing stereomodel, stereoplotting and stereocompilation on TerraSAR-X Digital Surface Model (DSM) and SPOT 6 imageries, produced the  Digital Terrain Model (DTM) image, which has not been affected by land cover. Fusion of the DTM  and Landsat 8 RGB 567+8 images  is used to interpret the distribution of lithology, geomorphological units, and lineaments, which are an indication of geological structures. The morphotectonic characteristics of sub-watersheds qualitatively was carried out a bifurcation ratio calculation (Rb) which indicates tectonic deformation. Based on the analysis of satellite images both qualitatively and quantitatively, the morphotectonic characteristics of the upstream, middle and downstream Cisadane Watershed have been deformed.Keywords : satellite images, morphotectonic, DSM, DTM, Cisadane Watershed.
KONTROL STRUKTUR GEOLOGI PADA ALTERASI DAN MINERALISASI DI DAERAH CIBALIUNG, KABUPATEN PANDEGLANG, PROVINSI BANTEN: CONTROL OF GEOLOGICAL STRUCTURE ON ALTERATION AND MINERALIZATION IN CIBALIUNG AREA, PANDEGLANG REGENCY, BANTEN PROVINCE Bari, Abdul; Fatimah Rosana, Mega; Haryanto, Iyan
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.v15i2.301

Abstract

Cibaliung is located in the Honje Igneous Complex, which is a Miocene volcanic complex, having two economically mineable quartz veins, i.e. Cikoneng and Cibitung veins. These veins have been mined and produced by PT Cibaliung Sumber Daya - subsidiary of PT Aneka Tambang Tbk. In the production process, the veins have reached the maximum limit. Therefore, a new reserve must significantly be discovered. The research methodology includes observation of geological structures with topographic lineament analysis, circular feature, river lineament analysis using Digital Elevation Model, and measurement of brecciation structure, shear fracture and gash fracture. The results of field data interpretation from 328 observation locations with 8,114 geological structure data both for shear fracture and gash fracture show that the presence of geological structures is directly proportional to the intensity of alteration and mineralization. From the structural and fault movement analysis and the correlation with mineralization and alteration data, there can be delineated 14 prospect areas, namely the Cikoneng-Cibitung, Cibengang, Rorah Kadal, Cikeni, Ramada, Mastar, Muara Cikeni, Cipatat, Ciburial, Cikamancing, Sompok Uara, North Batulawang, Cikarae-Cingenge, and Ciparay Prospects. From these prospects, it is recommended to conduct further exploration on six prospects, namely Cibengang, Ramada, West Cikoneng, Cikamancing, North Sompok and the North Batulawang Prospects.
Geochemistry of Volcanic Rocks in Ponelo Island, North Gorontalo, Indonesia Nurahmah, Siti Chusnul Chatimah; Rosana, Mega Fatimah; Haryanto, Iyan
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.2024.9.3.16832

Abstract

Ponelo Island is located in the northern part of Sulawesi, which is still an enigma regarding the genesis of the volcanic rocks found on this island. Therefore, the objective of this study is to understand the petrogenesis and tectonic implication of these volcanic rocks. Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) to obtain trace and rare earth elements is the method of this study. The volcanic rocks found on Ponelo Island consist of basalt and basaltic andesite rocks with a calc-alkaline affinity. The transition data suggested a highly fractionated cause of low transition element (Ni=17-38 ppm; Cr=13-47) compared to primary magma concentration, anomalies negative of Ba, Sr, and Ti of spider diagrams, and negative anomaly of Eu (Eu/Eu*=0.88-0.99). Relationship between low concentration between Ce/Y (0.74-0.76) and La/Yb vs Sm/Yb ratio indicated ~5% spinel-lherzolite mantle source partial melting. On the other hand, incompatible element ratios, such as Ba/Nb (39.03-45.28), Ba/Th (75.52-82.67), Rb/Nb (3.93-6.22), K/Nb (1772.22-2703.45), Ba/La=13.67-14.57, Th/La (0.17-0.18), La/Nb (2.91-3.16), depleted Nb/U (6-6.74), and also lack of xenolith or enclaves indicate cryptic crustal contamination.  The slab-derived fluid indicated by ratios of Rb/Y (0/019-0/05), Nb/Y (0.10-0.11), Th/Yb (0.52-0.61), and Ba/La ratio (13.29-14.57). Ponelo volcanic rocks shows typical calc-alkaline island arc tectonic setting particularly with enrichment in ion lithophile element (LILE) and light rare earth elements (LREE) along with depletion in high field strenght elements (HFSE) and heavy rare earth elemets (HREE), as shown by spider diagrams.
THE SINISTRAL STRIKE SLIP FAULT AS AMPANA BASIN CONTROLLER IN CENTRAL SULAWESI Saragih, Rahmat Yantono; Haryanto, Iyan; Sukiyah, Emi; Ilmi, Nisa Nurul; Sunardi, Edy
Journal of Geological Sciences and Applied Geology Vol 2, No 4 (2018): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v4i2.18289

Abstract

The presence of gas seepage born in Tanjungapi precisely in the southwestern part of the basin.This remission is supposed to be formed from main rocks of Mesozoic aged. The condition ofAmpana Basin formation cannot be separated from the effect of the relatively northeast-southeastsinistral strike-slip-fault. Based on the 43 outcrop, the main deformation product was identified asan extensional/hybrid joint with a relatively west-east fault line structure on average shear strain(η) = 58o (+) to (η) = 60o (+) and in form of the relatively northwest-southeast strike-slip-faultstructure line with the range of shear strains value between (η) = 45o (+) to (η) = 54o (+). Thekinematics movement of relatively vertical main stress gives a subsidence impact on the surfaceof Mesozoic-Paleogenic aged rock. The sedimentation process of Neogene-aged clastic, from theBongka Formation, Kingtom Formation, and Lonsio Formation ran fast and make the lowerMesozoic-Paleogene-aged rock being burdened by the upper younger rocks. The tectonicdevelopment in Ampana Basin is recorded in Lonsio Formation, Bongka Formation, and limestonein the form of structural indication and deformation showing the period of Central Miocene toHolocene tectonic with the relatively west-east direction of the main regional stress. Keywords: Ampana basin, deformation, strike slip fault, Sulawesi, Tanjungapi
Combining geological surface data and geostatistical model for Enhanced Subsurface geological model Alfadli, Muhammad Kurniawan; Natasia, Nanda; Haryanto, Iyan
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13451

Abstract

AbstractThis paper emphasis the use of geological information gathered from surface mapping and subsurface data, the method that used was mainly utilizing statistical information and deterministic model interpreted. Comparison model was built to calculate the deviation between realization, the calculation was furthered can be used as a uncertainty to make a better decision to choose the best realization. Geostatistics is a branch of statistics focusing on spatial or spatiotemporal datasets. In geology, geostatistical is used for numerical calculation of subsurface approach with several data such as geophysical or geological observation. Geostatistics modelling have several parameters setup to obtain best approach model. The parameters namely lithological boundary, geological structure and random seed number. Process for modelling used 23 drilling data with various lithological type. Two type geostatistical method is applied for the data that is Indicator Kriging (IK) and Sequential Indicator Simulation (SIS) with grid size 1000x1000 and 2000x1500. Distribution of lithology begin without parameters. Resulted shown that the model not appropriate with geological surface data and mismatch lithology position. To obtained better model, several geological information is included before geostatistical calculation. From regional geology surface data is obtained geological formation within lithological information. Then, geological structure describes the geology fault and formation boundary.Keywords: Geostatistics, subsurface, enhanced model, variance, random seed number
Linking Petrography And Petrophysical Analysis In Carbonate Reservoir Characterization: Case Study In Baturaja Formation Offshore Northwest Java Natasia, Nanda; Alfadli, Muhammad Kurniawan; Arfiansyah, Kurnia; Hardiyono, Adi; Barkah, Mohamad Nursiyam; Haryanto, Iyan
Journal of Geological Sciences and Applied Geology Vol 2, No 2 (2017): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v2i2.13448

Abstract

AbstractLinking geological analysis with petrophysical characterization in complex carbonate reservoir is a chalangging task. Many previous researcher has proofed that depositional facies in carbonate reservoir has very little advantages in reservoir quality due to overprinted with diagenetic facies. The difficulties in characterized the carbonate may rise because one does not include some genetic, geometrical and petrophysical character of the pore space, both geometry and distribution. The aim of this study is to evaluate the reservoir rock typing in carbonate reservoir by comparing rock-fabric descriptions analyzed in thin section with laboratory measurements of porosity, permeability, capillarity, and Archie m values. Methodology employed for this study involved the examination of thin sections and the integration of routine analysis data following lucia’s pore classification scheme. The first step in characterized the petrophysical class is the determination of interparticle porosity by substracting the separate vug porosity from total porosity. The separate vug porosity is estimated in petrographic analysis in 325 thin section samples. Than estimating the value for un cored interval by determining the relationships between total porosity, separate vug porosity and sonic interval transit time. The petrographic analysis to estimating the separate vug porosity is a qualitative way, and so the value is not quantitative, but the trend is still implies the value so the relationships between porosity and sonic log can be quantified. Calibration of pore types to acoustic log response is accomplished by making a detailed log of porosity types described from thin sections and constructing Z-plots of total porosity and transit time from logs and separate-vug porosity from thin sections . The “m” value (lithology exponent or cementation factor) is different from the other terms in the Archie equation in that it is related to rock fabrics, specifically to vuggy porosity. Reservoir characterization by using this scheme has proofed that geological analysis made in detailed thin section can be a helpfull tool since the validation in tested and produced interval shows a verry good relationships. Keywords : Reservoir Characterization, Baturaja Fm., Carbonate, Petrophysics.
Study Seismotectonic Around Kalimantan Island Using Likelihood Method Haryanto, Iyan; Lamba, Lisa; Ayu, Shinta; Sunardi, Edy
Journal of Geological Sciences and Applied Geology Vol 5, No 1 (2021): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v5i1.35096

Abstract

Based on Indonesia Seismicity Map and Indonesia Seismotectonic Unit Map (Geological Research and Development Center, 2003), it can be seen that the Kalimantan Island area has the lowest earthquake vulnerability compared to other regions in Indonesia. However, in past recent years, there have been several destructive earthquakes occur in this area. As it occurred on June 5, 2015, in Ranau area with a magnitude of 6, on December 21, 2015, in Tarakan area with a magnitude of 6.1, on June 24, 2016, with a magnitude of 5.1, on 25 February 2015 with a magnitude of 5.7 in the northeast of Tarakan and 12 July 2018 in Katingan with a magnitude of 4.2. This indicates that the possibility of a potential earthquake in the Kalimantan area can still occur. For this reason, it is necessary to identify seismotectonics and the recurrence period to ensure the potential for earthquake hazards on the Island of Kalimantan. The likelihood method is used to calculate those parameters with earthquake data from 2009-2020 with a magnitude ≥ 5 and a depth of 0 – 350 Km sourced from the Meteorology, Climatology and Geophysics Agency (BMKG). Based on the calculation results, it is obtained that the value of a is 2.71222 and the value of b is 0.64077. In general, it can be concluded that the seismicity level of Kalimantan Island is quite low.Keyword: Seismotectonic, Kalimantan Island, Seismicity index, likelihood method