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Articles 6 Documents
Search results for , issue " Vol 3, No 1 (2015): PROMINE" : 6 Documents clear
Interpretasi Struktur Geologi Regional Pulau Bangka Berdasarkan Citra Shuttle Radar Topography Mission (SRTM) (Interpretation Structure of Regional Geology on Bangka Island with Shuttle Radar Topography Mission (SRTM)) ., franto, M.Si
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

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Abstract

This paper aims to present the regional geological information related to geologic structure on the Bangka island. In this paper the processing done digitally on the image of SRTM (Shuttle Radar Topography Mission) by combining the value of azimuth and altitude in order to obtain the number ofalignment able delineated and recognizable become more by incorporating N0oE, N45oE, N90oE and N315oE artificial lighting as well as the value of the slope of the sun at 45o. Based on the interpretation of the results obtained Hillshade and rose diagram direction relative straightness dominant northwest-southeast trending interpreted as a manifestation of the direction stance layers,but it also contained lineament trending northeast-southwest according Margono et al. (1995) a rock folds covering Tanjung Genting Formation and Ranggam Formation, large tilt between 18o-75o and showed great intensity and there is tectonic lineament trending north-south, according to Mangga and Djamal (1994) was a fault and the fault is in the phase of the youngest as well as the fracturing horizontal cut of older faults (Crow , 2005). Straightness morphological pattern of spread and intensity level of tectonic deformation by the force in the research area is obtained by calculating the count lineament density based Geographic Information System with ArcGIS 9.3 in order to obtain density interval straightness into three classes, 0-28.72503662 km / km2 (low), 28.72503663- 57.45007324 km / km2 (medium) and 57.45007325-86.17510986 km / km2 (height) The higher the intensity, the area is assumed to be much deformed and most likely close to the structure geology. Keywords: Tektonic,Structure, Lineament, Hillshade, GIS.
Analisis Kekuatan Massa Batugamping Dengan Menggunakan Kaidah Hoek-Brown Failure Criterion-Roclab di Daerah Gunung Sudo Kabupaten Gunung Kidul Yogyakarta Wijaya, R. Andy Erwin; Isnawan, Dianto
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

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Abstract

The research area is a limestone quarry region prospect, located in Gunung Sudo, Gunung Kidul Regency, Special Region of Yogyakarta Province. Safety factor of bench in limestone quarry is extremely determined by rock mass quality. The aim of this research is analyzing of rock mass strength of limestone in the quarry prospect using the Hoek-Brown failure criterion.     The research used quantitative method. To obtain rock mass strength analysis of limestone needs some parameters. The main parameters are uniaxial compressive strength of intact rock, GSI, lithology, disturbance factor, unit weight and application for slope (height).To solve this analysis is assisted by Roclab software. The Roclab is a software program for determining rock mass strength parameters based on the generalized Hoek-Brown failure criterion.     Final result of the research will be used for safely mine design of the limestone quarry.  Keywords: Rock mass strength, Limestone, Roclab.
Investigasi Potensi Agregat Geoteknik Dengan Metode Geolistrik (Investigation of Potential Geotechnical Aggregate With Using Geoelectrical Methods) Rusli, Muhammad
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

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Abstract

Geotechnical Aggregate are rocks that can be used as material for a wide range of construction engineering purposes. The need for geotechnical aggregates increased along with the rapid development. Required sources of aggregatequalified engineering was good, close to the project site and has large reserves. This research will be carried out an investigation to get to the source of geotechnical aggregate surveying of Geology and Geophysics measurements.  Geophysical measurement is working by using of Geoelctric methods with Schlumberger configuration. Geological survey result obtained is that the material consists of geotechnical aggregate are QTV , Qtvl and TMV , composition form clastica volcanic rocks , breccias , lava , tuff andesite to basalt.     Result of Geoelectric measurements showed that the potential for geotechnical aggregate form Alluvial rocks having resistivity values between 2-20 ohm meter , whereas the geotechnical aggregate form intrusive rocks is 30-80 ohm meter . Resource potential Probable amounted to 5,742,453 m3 .  Keywords: Aggregate geotechnical, Geolistrik, Schlumberger, Resource.
Dampak Konversi Tata Guna Lahan di Daerah Resapan Terhadap Penurunan Cadangan Airtanah di Kabupaten Sleman, Daerah Istimewa Yogyakarta (Effect of Landuse Conversion at Catchment Area to Decrease Groundwater Reserves, In Sleman Regency, Yogyakarta) ., Sutanto; ., Purwanto; Haty, Intan Paramita
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

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Abstract

Utilization of land use in the Daerah Istimewa Yogyakarta Province resulted in an increase in subsidence and reduced groundwater recharge area of rainwater in catchment areas. The aim of this study was to determine the area of agricultural land were converted to housing, other infrastructure, and the mining area during the last 5 years, as well as to analyze changes in the hydrological system due to land conversion, especially the water supply to the area of the aquifer.     This study is a summary based on secondary data collection, observation and description in the field, measurements of rock permeability and infiltration, as well as laboratory and studio work. Employment in the field is also observed for conversion of land use that occurred and compare the physical properties of rocks before and after conversion. Evaluation is emphasized on the water balance equilibrium calculation has been calculated on the amount of percentage changes in land use and analysis of the impact of the conversion of land use in the catchment area to change the content of groundwater.     Based on the results of the calculation of the projected reserves of groundwater due to land conversion, water reserves and infiltrasiakan volume continued to decline from year to year. This study is expected by the general public is expected to use the existing land well and wisely with regard to groundwater reserves so that it can minimize the reduction in water reserves and infiltration from year to year.Keywords: landuse, groundwater level, catchment area, infiltration, aquifer
Identifikasi Endapan Batuan Volkanik Berdasarkan Data Sistem Informasi Geografi (SIG) Daerah Danau Ranau, Propinsi Sumatera Selatan ., Idarwati
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

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Abstract

Ranau Lake as the second biggest lake in Sumatra Island. On Plio-Pleistocene Ranau Volcano (Volcano-tectonic) eruption resulted the formation of Ranau Lake. After the great eruption of Ranau Volcano, grow up another volcanoes like Seminung Volcano, and become a Ranau Volcanic Complex. At the foot of Seminung Volcano often showed sulfur gas burst activity which are indicated by the death of organism in Ranau Lake. The increasing of burst gas and locally earthquacke to be the principle one to predict the possibility of volcano eruption for anticipation and decrease the impact of volcano eruption. The research objective was to determain the characteristics of rocks formation surrounding Ranau Lake using Landsat Imagery.      Keywords: Ranau Lake, Volcano, Landsat Imagery.
Model 3D Mineral Hematite Berdasarkan Data Geomagnet di Desa Uekuli Kabupaten Tojo Una-Una (3D Model of Hematite Mineral Based On Geomagnetic Data in The Uekuli Village Tojo Una-Una Regency) Parhusip, Jaingot A.; Rusli M, Muhammad
PROMINE Vol 3, No 1 (2015): PROMINE
Publisher : Jurusan Teknik Pertambangan FT UBB

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Abstract

Uekuli Village Tojo Una-Una Regency, have potential of natural resources such as iron sand that containing mineral hematite which is a basic ingredient on the steel industry. This is evidenced by the deposition of iron sand and iron ore rock outcrops in the area. To determine the magnitude of the potential distribution of the iron ore it has performed geophysical exploration using geomagnetic methods. Research by using geomagnetic done through the stages; acquisition of field data, make corrections IGRF and daily variation correction, modeling using 3D modeling software Mag2dc and with help of rockwork software. Results of the study, found that the magnetic anomaly data has avalue range between -120 nT to +160 nT. Magnetic minerals contained in the iron ore is hematite. Estimation volume of distribution of mineral hematite are 377 300 m3.Keywords: Geomagnetic, IGRF, Mag2dc, 3D Models, Hematite.

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