bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structure System and It Controls to Mineralization of Primary Tin Deposit, Airdibi Area, Jebus Subdistrict, West Bangka, Bangka and Belitung
Authors: Prihutama Faiz Akbar , Syarifuddin Muhammad , Ryandhika Angger Imas Asshidiqie Faric , Widya Yogatama Suprapto Angga , Aviandono Reza 
Published: November 2019

Abstract
Bangka Island is one of the most potential areas with abundant mineral resource in indonesia. The main commodities in the exploration of metal mineral deposits on Bangka Island are tin. Tin deposits located on Bangka Island are formed from acid magma produced of collision. The research location is in Airdibi area, Jebus subdistrict, West Bangka regency, Bangka and Belitung province. The objective of this research is to know the characteristics of primary tin deposit by observing the geological aspect, and the distribution of alteration and mineralization. Research method are used is surface geological mapping. Analyzes performed to process surface geological data are petrographic analysis, mineral graphic analysis, ASD analysis (Analitycal Spectral Devices), and XRF (X-Ray Fluorescence) analysis. Stratigraphy of this research areas from the old to the young, namely the Complex Pemali Uni, the Tanjunggenting Sandstone Unit, the Fine Grain Granite Klabat Unit and Alluvial Deposit. Assemblages Minerals alteration at the study sites results from an ASD analysis showing the minerals resulting from a hydrothermal process consisting of six zone there are Tourmaline + Muscovite + Chlorite + Illite + Smectite, Silica + Tourmaline, Illite + Smectite + Chlorite + Tourmaline, Illite + Smectite + Tourmaline, Muskovite + Quartz + Illite + Smectite + Halloysite, Kaolinite + Illite + Smectite. From the XRF analysis showing the various grade of tin on the vein. The geologic structure that developed in the research area is highly controlling the primary tin mineralization process. Veins with a relatively NW-SE direction which is an extension faults product has a higher level than a sheeted veins with a Relatively NE - SW direction which is a compression faults product. Based on field data and the results of laboratory analysis, deposit type greisen deposits in the vein phase.
Integrated of Static and Dynamic Modeling Workflow for Belimbing Oil Field Development of Talangakar Sandstone Reservoir, South Sumatra Basin
Authors: Gadi Karolina Bala , Stephani Grace , Wicaksono Ricky , Muslim Abdurahman F. , Wismoyo Yoga 
Published: November 2019

Abstract
The Belimbing Field S layer is a layer of the Upper Talangakar Formation (TRM) with a transition precipitation environment deposited in the syn-rift phase with the upper Oligocene lifetime up to the lower Miocene productively producing oil. This is a sandstone layer that contributes the largest production current with 645 bopd production (96% watercut) of OOIP 107 MMBBL. Water injection at Bel-10 wells and Bel-11 wells was first performed in October 1997 with an injection rate of 762 bwipd. The water injection is performed peripherally from the north flank of the star fruit structure (Central Belimbing block) with the initial goal of pressure maintenance even though the water is injected into the oil zone in the S layer. There is a significant increase in pressure and oil gain in the monitor wells in the injection area. With the last RF of 30% indicates that this layer still has a lot of potential to be developed by waterflood method. The BEL-19 injection in the Eastern Block from 2005 to 2015 was detected by success with increased pressure and increased production at BEL-12, BEL-14 and BEL-27 wells. As an effort to increase production, field development studies were conducted for GnG study and dynamic modelling. Limitations on the number of core data (SCAL and RCA) become obstacles in G & G and Reservoir modeling, so in determining rock typing used core data from the nearest field (LimauNiru) is L5A-240 well. In this method also performed synthetic data processing curve relative permeability and capillary pressure by evaluating production data. The distribution of artificial intellegent (AI) and wavefom is required to know the distribution of Facies and reservoir properties so as to get a more detailed description and heterogeneity of the reservoir. From the data above, we obtain rock typing to distribute reservoir property in 3D static and dynamic model. Through the initialization process, history matching and forecast is then processed the best scenario, the waterflood pattern in the form of inverted five spots and primary infill to optimize the recovery of oil recovery.
Quartenary Sediment Facies Distribution in Meandering River Environment: Study Case at The Kampar River, Rumbio Area and Surroundings, Riau Province
Authors: Revanda Muhammad , Yuskar Yuniarti , Eka Putra Dewandra Bagus , Sari Dilla Permata 
Published: November 2019

Abstract
Study area is located on the Kampar river in the district Rumbio and surrounding areas, located on the upstream side which is about 100 kilometres from the source of the sediment that Bukit Barisan mountain, Kampar river has a length of 413.5 km, the average width of 143 m and a depth average 7.7 m. This river is a river with meanders type carrying supplies suspended sediment and bed - load (mixed load) together with a low energy. This study aims to investigate the characteristics of sedimentary facies sediment quarter and deployment. The method used is a field survey to obtain core data rocks (1-3 meters) by 8 points wells, and cross sections measured(trenching) which is a layer of sediment that have been exposed (1-8 meters), then performed the sieve analysis to determine the grain size and sedimentary facies analysis and continued with sedimentary facies distribution map-making quarters in the study area. The facies sediment formed that Channel with the characteristic blocky to fining up succession have dominant deployment is the southernmost area of research with a thickness of 200 – 320 cm. Deployment sediment sand bar with characteristic coarsening up succession is in the northeast and southeast regions of study area with a thickness of 125 - 145 cm Next oblique accretion with upward fining characteristics that are in the north-eastern part of the area of research with a thickness of 40 cm. As well as having overbank sediment that contains a lot of organic material such as roots, stems, and foliage, with its spread is in the west and southwest area of research with a thickness of 100-160 cm. meandering river system leads to changes in sedimentary facies laterally intensive.
Crystal size distribution (CSD) of plagioclase phenocryst-microphenocryst and the calculation of crystal resident times in the continuous central eruption sequences of Mount Lasem, Central Java, Indonesia
Authors: Nugroho R P , Disando T , Kurniawan I A , Abdurrachman M 
Published: November 2019

Abstract
Mount Lasem is an extinct volcano in Central Java. Based on field work, five continuous central lava eruption sequences were identified. The rocks sampled from those lava units were classified as andesite which exhibit sign of magma mixing based on textural features from optical microscopy observation. With consideration of the importance of plagioclase in magma cooling reconstruction, a quantitative approach using crystal size distribution (CSD) of plagioclase phenocryst (long axis >=0.5 mm) and microphenocryst (long axis 0.1 – <0.5 mm) from five lava units was conducted. This method, which has never been applied to the eruption products of this volcano, revealed variation of magma resident time during the continuous central eruption phase of Mount Lasem. By using G=10-10 mm/s (growth rate) for plagioclase phenocryst and microphenocryst, residence times of the magma for both populations were predicted at 63 – 120 years and 8 – 18 years respectively. This results show that there are different time and mechanism constrains in the crystallization of the two populations prior to eruption events.
Geochemical Approach to Reveal The Genetic Occurrence of Gibbsite, Relative to The Parent Rock Type in Lateritic Bauxites
Authors: Nugraheni R D , Sunjaya D 
Published: November 2019

Abstract
Situating in a tropical climate, will be favourable for Indonesia and Malaysia to have an intensive weathering and a concentration of lateritic bauxite. The study area takes place in Kuantan, Pahang State, Malaysia and Landak area, West Kalimantan, Indonesia. The study area has different type of parent rock, topography and drainage condition, which will also cause the different characteristics of alumina minerals in bauxite. One of the common form of alumina minerals is known as Gibbsite [Al(OH)3]. The objective of this research is to investigate the genesis of gibbsite from two different parent rocks. Samples were taken and collected from pitting, analyzed for Al2O3, Fe2O3, SiO2 and TiO2 using XRF and XRD examination. The parent rock of bauxite in Kuantan is basalt, meanwhile, in Landak, ranges from granodiorite to andesite. Petrography and XRD analyses of Kuantan bauxite shows predominant gibbsite, with minor amount of geothite, hematite, kaolinite, illite, quartz and feldspar, while in Landak, mineralogically consists of variant amount of gibbsite, goethite, hematite, kaolinite, illite and quartz. In Kuantan, the amount of Al2O3 varies from 23.6% - 51.01%, nearly similar than that in Landak that varies from 31.35% - 55.03%. Gibbsite in Kuantan is assumed as a transformation of Ca-rich plagioclase and Ferromagnesian- silicate minerals, on the other hand, gibbsite in Landak was produced from direct weathering of primary Al- silicate minerals (Na- plagioclase and K-feldspar). From study, it can be inferred that gibbsite formed from a layer of silicates and will concentrated in finer clay as a weathering product. Moreover, the different types of parent rock will produce different types and amount of alumina minerals. The study will be beneficial to predict the existence of potential alumina minerals in lateritic bauxite.
Analysis Rock Mass Rating (RMR) Elevation Inlet Diversion Tunel Luewikeris
Authors: Rahman Den Habib Ibnu , Rachman Sofyan 
Published: November 2019

Abstract
Leuwikeris Dam Project located in Handapherang Village, Cijeungjing District, Ciamis Regency, West Java Province is one of the dam projects built on volcanic sediment rocks including in the Old Volcanoes Formation. Limit Equilibrium Method (LEM), is a method used to find the Rock Mass Rating (RMR) value in each elevation on the slope of the Dodge Tunnel Inlet. Based on the analysis, the result of its RMR value at the elevation of 130 meters has rock mass class is II (Good), elevation of 140 meters has rock mass class is II (Good), elevation of 145 meters has rock mass class is III (Medium rock), and elevation 157 meters have a class of rock mass is III (Medium rocks).
Risk Analysis of Slope Stability Open Mine With Probability Method PT. Timah (Persero) TBK Batubesi Area, Damar, East Belitung
Authors: Paramesywara Teguh Samudera , Setiawan Budhi 
Published: November 2019

Abstract
The stability of mining slopes, especially on tin minerals, has different criteria than other minerals. The safety factor that becomes the reference value of the stable slope of the mine can also reflect the movement of the land (Lubis, 2012 in Wijayanti, 2015). In processing these FK values often do not take into account that all parameters have equal oppurtunity to represent those parameters (Azizi, 2012). The probability method is a way of anlyzing the risk of mining slopes by including several parameters including wet density, dry density, cohesi and friction angle. The research aims to get FK and PK values that are stable and efficient to be mined because the smaller than the slope is opened, the smaller the tin mineral recovery and the higher the stability of the slope and vice versa. To get the value of FK and PK need to do slope analysis with limit equilibrium method and probability method then modeled with Slide V.6.0 software and calculation with Excel program. Data processing is from 4 drill points found that GT_01 with value FK > 1,3 indicating that the slope safe and movement of soil can occur and get value PK 0,5 – 0,6 %. For GT_02, GT_03 and GT_04 obtained unsafe slope results so optimization is necessary.
Identification Of Sinter Silica Evolutionary Manifestation As A Bicarbonate Travertine Based On Isotope 18O And 2H Review Of Local Meteoric Water Line Curves As Determinant Of Outflow Fluid Reservoir In Cisolok-Cisukarame Geothermal System
Authors: Gleamen Tubagus , Lutfi Ahmad , Didit Agus , Giffari Farhan Rijal 
Published: November 2019

Abstract
Cisolok geothermal system located in Cisolok district, Sukabumi regency has undergone an evolution. One of the indication is the transformation of its surface manifestation from Silica sinter to Bicarbonate travertine. The existence of this travertine indicates the presence of bicarbonate spring and reservoir systems temperatures below 150°C, which are the hallmark of two-phase liquid dominated geothermal systems. Analysis of stable isotopes (18O and 2H) is used to identify the reservoir water’s source affecting the evolution of Cisolok’s surface manifestations. The stable isotopes are then compared with the global and local meteoric water line. The contents of isotope 18O and 2H, after being compared with the global and local meteoric water line, gives a visual data that’s adjacent and in line with the local meteoric line. This indicates that the hot water from Cisukarame manifestation originates from local meteoric water, which is the result of evaporation and precipitation from the local water. The evolution of the geothermal system in this area is indicated by the increase of isotope 18O content in water and a decrease of the same isotope among the rocks. Indication of the temperature reduction in this area, which is estimated to have happened over a period of 10,000-50,000 years, involves a diagenesis reaction and an amorphous silica hydrolysis that caused the increase of 18O and dD levels in the water. With two-phase liquid dominated geothermal systems, there’ll be many outflows that bring diverse manifestations. The results of the data analysis show that the evolution of the Cisolok geothermal system occurs due to the contact between reservoir fluid and limestone lithology at a depth of 350-600 meters which causes the Cl water content in the system to transform into HCO3 water content and alter the surface manifestations of silica sinter containing amorphous silica into a travertine containing bicarbonate.
Application of microwave remote sensing polarimetric synthetic aperture radar for the new geological map of peatland distribution, humidity and its sample properties in Regency of Siak, Riau Province, Indonesia
Authors: Kausarian Husnul , Sumantyo Josaphat Tetuko Sri , Takahashi Ayaka , Widodo Joko , Izumi Yuta 
Published: November 2019

Abstract
Siak Regency is one of the areas in Indonesia that has peat areas. Events of forest fires occurring in Indonesia caused by the dryness of peatland attracted the attention of many parties to pay attention to this land as a serious matter. From this study, we found variations in soil moisture conditions around 11 - 50%, associated with soil content, the limiting pH parameter in peatland is about 3 to 4. With the approach of remote sensing microwave technology and field validation measurements by counting humidity, sample properties, it is known that the character of the peatland as well as produce the latest geological map for the distribution of peat and the region contained within the Regency of Siak.
Hydrogeology And Hydrochemistry Of Shallow Groundwater And Surface Water And Potential Water Pollution In Gadung District, Buol, Central Sulawesi
Authors: Yanti Zikri , Putra Doni Prakasa Eka , Hendrayana Heru 
Published: November 2019

Abstract
Inhabitants of Gadung District depend on Labuton River and shallow groundwater as their water resources. But issue of river pollution caused by gold mining activities operated for decades around upstream area of Labuton River becomes challenge for their water demands. In the other hand, shallow groundwater from dug wells has low resistance for contaminants from urban activities around downstream area. This study aims to analyze characteristics of hydrochemistry and to identify pollution cases in research area. In order to recognize flow path of shallow groundwater water table in research area have been measured.EC, pH, and TDS from water samples (13 samples from Labuton River and 16 samples from groundwater) has been measured. Na+, K+, Ca2+, Mg2+, F-, Cl-, NO3
-, SO4
2-concentrations of the samples measured using Ion Chromatograph. HCO3
-concentrations of the samples measured using Alkalinity Checker. Hydrochemistry Labuton River which is dominantly associated with Dolokapa Formation is controlled by rock weathering process. It is indicated by TDS 50 - 200 mg/L and total cationic charge 428,7 - 2973,8 μeq/L. Labuton River and shallow groundwater in research area has hydrofacies Mg+HCO3 type generally, but Mg+SO4 type is shown along ± 5.2 km of water flow of Labuton River from mining area to the downstream zone which is categorized as MIW (Mining Influenced Water). MIW in Labuton River has high concentration of SO4
2- (9.27 to 35.12 - 36.03 mg/L), high TDS value (100 to 140 - 160 mg/L), and low pH (6.3 to 5.4 - 5.6) from its original water. Labuton River water is polluted by contaminant from mining activity along ± 2.8 km water flow indicated by pH 5.4 - 5.6. Groundwater in some part of study area is polluted by urban contaminant indicated by concentration NO3
-> 3 mg/L (3.33 - 19.43 mg/L).
Ecotourism Potential of Batu Gelap Cave, Kutai Kartanegara, East Kalimantan
Authors: Sasmito Koeshadi , Wahyudi Agus , Sutan Syamsidar , Alam Fajar 
Published: November 2019

Abstract
Batu Gelapcave located in Suka Maju Village, Tenggarong Seberang District, Kutai Kartanegara Regency. Batu Gelap Cave is geologically included in Pulau Balang Formation, which is deposited in the transition environment or Back Barrier. Deformation that occurs in the Middle-Miocene of the geological structure of folding and faulting. Geomorphology of the study area can be divided into four kinds of (1) Landform are mountainshomocline ororigin (S1), (2) Hilly landforms homocline (S2), (3) Landforms swamp(F1) and, (4) Alluvial landforms (F2). The height of the area between 25 - 125 mdpl, slope 20-40%. The lithology in the area are fossiliferous limestones, packstone - grainstone, crystalline carbonate, and packstone with clay inserts. There are stalactites, stalagmites, and underground rivers with various conditions in the cave. In some parts of Batu Gelap Cave area, there is a historical relic site that has historical past. A good understanding of the geological and historical potential of Batu Gelap Cave area makes this area has a unique appeal in the development of tourism-based area.
Development of Community-Based Ecotourism in Ngargoyoso District, Karanganyar Regency, Central Java Province
Authors: Muryani Chatarina , Santosa Sigit , Prihadi Singgih 
Published: November 2019

Abstract
This research was aimed to (1) identify tourism objects in Ngargoyoso District, Karanganyar Regency and (2) analyse tourism readiness in Ngargoyoso District to be developed into community-based ecotourism. Data was collected through observingthe environmental conditions, determining tourism objects locations through GPS, and interviewing managers, communities and tourists. The development of Community Based Ecosystem readiness evaluation follows CBE which was developed by WTO and INDECON with regard to four aspects namely socio-economic, socio-cultural, environmental and management aspects. The results showed that: (1) in Ngargoyoso Sub district there were 19 tourism objects, consists of 2 cultural tourism objects, 5 original natural objects and 12 artificial natural objects; (2) The results of the CBE readiness evaluation of Ngargoyoso Sub district were, 5 tourism objects were in very good categories, 12 objects were in good category, one tourismobjectwas in medium category and one tourist objectwas in very bad category.
Implementation of Fuzzy Mamdani Logic Method for Student Drop Out Status Analytics
Authors: Irfan Mohamad , Alam Cecep Nurul , Tresna Dea 
Published: November 2019

Abstract
One of The Contribution of Information Technology in the World of Education at University is the System of Executive. the Information that needed by the Executive Department is an Information Student Data that supposed to be drop out. all this time the Process to determine the Student Faculty of Science and Technology Status as Drop out at Sunan Gunung Djati (SGD) States Islamic University Bandung, had not to apply the Automatic Sysytem, based on this case, therefore we need a Solution to handle it, by Develop the Executive Information System. The Method that we need for Developing this System is by using the Fuzzy Mamdani Logic Method, there are 4 Steps to bring the Output of this Method 1.) Creating a Fuzzy set, 2.) Application of Function Implication 3.) Composition Law, 4.) Defuzzification. Based on this research, we will make a comparison between Manual Calculation and System Calculation, with the Accuracy 100%. The final result of this Method can be referenced for System Executive to Analyze the Student that should be given a Warning or Drop Out.