Abbreviation: J. Geol. Min. Res.
Start Year: 2009
Page 1 of 7, showing 20 records out of 139 total, starting on record 1, ending on 20
DOI: 10.5897/JGMR16.0263[Article Number: 161D63C62925]
Batouri is located in the East region of Cameroon; geologically the area is made up of Pan African granitoids, which are the host rocks of gold mineralization. Batouri gold deposits have long been subjected to artisanal mining activities carried out by the indigenes for livelihood. Majority of the mining population (45%) is made up by youths (15-30 years), followed by the adults (35%) within the age range 46-60 years... Read more.
DOI: 10.5897/JGMR2016.0248[Article Number: 2C2A94D60134]
The geotechnical properties of Daki Biyu district in the Federal Capital Territory, Abuja, Nigeria was investigated to ascertain the suitability of the sub-surface soil to support massive infrastructure such as high rise building and industries that might be carried out in the future. The particle size distribution shows that the soil is predominantly sandy-clay to sandy-gravels. The plasticity indices suggest low to... Read more.
DOI: 10.5897/JGMR2015.0230[Article Number: 9FB684759542]
In the southwest branch of the Diagorou-Darbani greenstone belt, mafic to ultramafic plutonic rocks outcrop in Pogwa area. Field relations show that these rocks are clearly intrusive in flattened pillowed-metabasaltes. They are made up of gabbros and pyroxenites with ultramafic rocks cropping out as panels or scattered lenses. Petrographic characters are suggestive of metamorphic grade varying from greenschist to... Read more.
DOI: 10.5897/JGMR2015.0243[Article Number: 090854859124]
In this study, effect of loading angle on location of crack initiation in flattened Brazilian disc (FBD) specimens was studied by both numerical and experimental methods. FBD tests were conducted on disc samples with various loading angles and tests were simulated by finite element method (FEM). The results showed that probability of crack initiation at flattened ends of samples where jaws and sample are connected... Read more.
DOI: 10.5897/JGMR2015. 0226[Article Number: 1B4C36847966]
Pore pressure and fracture pressure predictions were made using seismically derived velocities from Onshore Niger Delta. Mild to moderate overpressure regime in the study area was predicted using Bowers’ unloading model. The onset of mild overpressure (<0.6 psi/ft) in the area lies within the depth range of 6000-10000 ftss. The formation becomes moderately over pressured (<0.8 psi/ft) as the pressure... Read more.
DOI: 10.5897/JGMR2014. 0212[Article Number: 0DF2ED854156]
Samples of stream sediments were collected in some parts of Iseyin-Oyan river schist belt, with a view to determining their elemental concentration and identifying geochemical anomalies associated with mineralization in the area. The geologic units consist of predominantly amphibolite schist with minor occurrences of coarse porphyritic biotite granite, quartzite and quartz schist. Chemical analysis was carried out on... Read more.
DOI: 10.5897/JGMR2015.0224[Article Number: 2EC0D8A53576]
Regarding clay rock at the mesoscale (that is, millimeter to centimeter), the structure of the porous clay matrix treated as continuum controls transport properties. Upscaling these mesoscale properties to the macroscale requires that representative elementary volumes (REVs) exists. The objective of this paper is to quantify the mesoscale REVs of the continuous clay matrix. Here, the REV is defined as the minimum volume... Read more.
DOI: 10.5897/JGMR15.0222[Article Number: A721B2D53045]
Geological mapping of the Gulani area revealed that the area consists of Precambrian Basement Complex rocks, Cretaceous sediments and the Tertiary/Quaternary basalts of the Biu plateau. The Basement Complex rocks are represented by diorite and granites while the sediments include the Bima, Yolde, and Pindiga Formations. Epigenetic baryte-copper mineralizations occur with the baryte veins restricted to the Bima and Yolde... Read more.
DOI: 10.5897/JGMR15.0218[Article Number: B2A1CE952617]
Knowledge of formation pore pressure ahead of the drill bit is not only critical for safe and cost-effective drilling of wells but also essential in studying the hydrocarbon trap seal and analyzing the trap configurations. A predrill estimate of the formation pore pressure can be obtained from seismic velocities and employing a velocity-to-effective stress transform. However, limitations abound in the use of seismic... Read more.
DOI: 10.5897/JGMR2014. 0215[Article Number: DEEE69951461]
Stope wall failures result in ground stability problems, ore dilution, revenue loss, etc. This work assesses mined primary transverse open stope (32S 204) in AngloGold Ashanti-Obuasi Mine to address stability problems mine-wide. The stope (17 m strike length, 30 m wide, 27 m high and dipping 68°NW) has the Obuasi Fissure as its hanging wall boundary. Back analysis of the performance showed that major geological... Read more.
DOI: 10.5897/JGMR14. 0217[Article Number: 394DABE50907]
The availability of mineral deposits for many decades provides an avenue for improving the economic development of the local artisanal and small scale miners in Tanzania. This study documents different possible locations from various available data and show the characteristics of the existing gold deposits extracted and processed by the artisanal and miners using ArcGIS software. It identifies the challenges of... Read more.
DOI: 10.5897/JGMR14.0213[Article Number: C97D5BB50107]
Nowadays, modeling is increasingly used as a method for determination of the mechanical and hydraulic behavior of the rock mass. In this paper, with regard to the high importance of joint persistence characteristic on the mechanical and hydraulic behavior of the rock mass, geometric-stochastic joint network model has been developed by considering the statistical characteristics of joint size based on Veneziano model.... Read more.
DOI: DOI:10.5897/JGMR14. 0206[Article Number: 99251CC47354]
In this study, an attempt is made to correlate the presence or absence of FEV1 < 80% predicted as measured by spirometry, with a number of individual and work related factors. This is a cross-sectional study involving 341 workers of an underground coal mine situated in the southern part of India. The data used in this investigation were collected from the Periodical Medical Examination (PME) center of the case study... Read more.
DOI: 10.5897/JGMR14. 0205[Article Number: B99F57F46463]
This paper describes the application of rock behavior index (RBI) based on the rock engineering systems (RES) to assess the rock behavior around underground spaces. There are many geological parameters that affect the rock behavior around these structures. The most effective parameters taken into account in this paper are: uniaxial compressive strength, rock quality designation (RQD), joint surface condition, joint... Read more.
DOI: 10.5897/JGMR14.0202[Article Number: AFBC64C44104]
The underground coal gasification (UCG) has a potential for converting the world’s coal resources into energy, liquid fuels and chemicals. The UCG process involves the injection of steam and air or oxygen into an underground coal seam and igniting and burning of coal in-situ to produce the combustible gas. Previous studies showed that many criteria affect site selection of UCG. The criteria include coal seam... Read more.
DOI: 10.5897/JGMR14.0197[Article Number: ADF262F46969]
Present paper deals with the petrogenesis of gabbros and pyroxenites of Bhavani complex, Tamil Nadu, Southern India. Studied gabbros are mainly composed of pyroxenes with minor plagioclase (An10-30) and amphibole minerals. Pyroxenites are composed of coarse-grained clinopyroxenes, orthopyroxenes and medium-grained hornblende minerals. Geochemically, in the total alkali vs. SiO2 diagram studied samples are... Read more.
DOI: 10.5897/JGMR14.0200[Article Number: C2F1F7846973]
The metamorphosed sandstones exposures occur in two locations in Wadi Sikait. The exposed rocks in this area are ophiolitic mélange, metamorphosed sandstones, porphrytic granites invaded by post-granite dykes (lamprophyres) and quartz-fluorite veins. The uranium contents measured radiometrically range from 3 to 41.97 ppm, with an average of 12 ppm, while the chemically measured are in the range from 20 to 100 ppm... Read more.
DOI: 10.5897/JGMR13.0192[Article Number: 822266D42785]
X-ray fluorescence (XRF) was evaluated as a technique that can facilitate identification of potential environmental hazards associated with mining and ore processing as well as provide quantitative evaluation of the economic potential intrinsic to a mineral deposit. Four different geological samples were analyzed using energy dispersive XRF to demonstrate the utility of the technique. The samples were obtained from... Read more.
DOI: 10.5897/JGMR13.0196[Article Number: 3A042A242784]
The objective of this study was to investigate the impact of anthropogenic and natural sources of contamination on the groundwater quality of the upper unconfined aquifer system of the Chad Basin around Maiduguri. This has been determined by obtaining a total of 20 groundwater samples over a 4 months period in 2 different sites (Moduganari and Gwange) in Maiduguri. Groundwater samples were analysed for pH, EC, TDS,... Read more.
DOI: 10.5897/JGMR13.0180[Article Number: 428FE7E42025]
Seismic refraction study has been carried out on Gurara Dam Phase II proposed axis with the aim of determining its feasibility for the founding of a dam. The field techniques involved off-end/reverse and split spread shootings on five profiles. The study site is situated on the Precambrian Crystalline Basement Complex rocks of North Central Nigeria. Velocity values obtained from the shots vary between 183 ms-1 in... Read more.
Page 1 of 7, showing 20 records out of 139 total, starting on record 1, ending on 20