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Shyam, Radhe
- Principles of Mise-a-la-Masse Method and its Application to Polymetallic Sulphide Deposits of Rajasthan
Authors
1 Geological Survey of India, 15-16 Jhalana Doongri, Jaipur-302004, IN
2 Indian School of Mines, Dhanbad-826004, IN
3 Marine Wing, Geological Survey of India, Calcutta -700016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 53, No 1 (1999), Pagination: 49-57Abstract
In surface geophysical surveys, resistivity contrast between the ore and host rock plays a vital role in the success ratio of the surveys. To overcome the problem of insufficient resistivity contrast, a modified method, Mise-a-la-masse, as tried and found to be very effective in tracing the extensions of polymetallic sulphides intersected in a borehole. The method was applied to Pb-Zn and sulphide hosted gold prospects in Rajasthan and the results obtained indicate that Mise-a-la-masse method can be successfully employed for delineating subsurface extension of polymetallic sulphide deposits.Keywords
Exploration Geophysics, Electrical Resistivity Contrast, Polymetallic Sulphides, Rajasthan.- Mise-A-La-Masse Technique in Planning the Exploratory Drilling for Basemetal Exploration in Sawar Belt, Ajmer District, Rajasthan
Authors
1 Geological Survey of India, Northern Region, Lucknow - 226 024, IN
2 Geological Survey of India, Western Region, Jaipur - 302 004, IN
3 Geological Survey of India, A M S E Wing, Bangalore - 560 078, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 67, No 1 (2006), Pagination: 83-91Abstract
A small deposit of lead and zinc was established in southern part of Sawar metasedimentary belt during third phase of drilling. The Mise-A-La-Masse survey, a post discovery geophysical method carried out in the boreholes of this belt has yielded significant results. This method has been useful in delineating the subsurface disposition of mineralised zones and their lateral extension. This technique is also successful in the area in establishing correlation between different parts of an ore body with varying sulphide percentage, which are located distantly but are in electrical continuity. Hence the Mise-La-Masse method has been of immense help in planning the boreholes thereby optimizing drilling cost in the Sawar Belt. The composite map of equipotential line and chargeability contour has indicated that the contour pattern and disposition of anomaly axes are similar in both the cases.Keywords
Mise-A-La-Masse Survey, Pb-Zn Mineralised Zone, Composite Map, Sawar Metasedimentary Belt, Ajmer District, Rajasthan.- Drill-Hole Induced Polarisation, Self-potential and Magnetic Surveys: Case Studies from Mineral Belts of Rajasthan
Authors
1 Geological Survey of India, WR, 15-16, Jhalana Doongri, Jaipur-302004, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 71, No 1 (2008), Pagination: 98-106Abstract
Downhole wide spacing IP (DHIP), Self-potential (SP), magnetic susceptibility and applied potential observations were made along the boreholes drilled for Pb-Zn-Cu sulphide in mineral belts of Rajasthan The aim was to identify mineralised zones, physical property contrast of the mineral and country rock and presence of mineralisation in the vicmity of the borehole but missed in drillingNumber of boreholes were surveyed in different parts of the mineral belts of Rajasthan and the relationship between apparent resistivity and chargeability, SP and magnetic susceptibility and lithology of the cores has been studied and analyzed Chargeability 'high', resistivity 'low', SP 'low/high' and magnetic susceptibility 'high' characterized the sulphide mineralisation The surveys were successful in detecting the presence of mineralisation in the drill hole, studying the m situ physical properties of barren & mineralised rocks and finding the correct depth of the conductor It helped in conducting raise-a-la-masse surveys and interpretation of surface geophysical data m mineral belts of Rajasthan Applied potential (Mise-a-la-masse), surveys were able to give information on the lateral extension of the mineralised zones intersected in the borehole
Five examples of detection of sulphide mineralisation in boreholes of Kayar, Pindwara-Watera and Danba-Bethumbi mineral belts of Rajasthan are presented The results indicated average appaient resistivity low value of the order of 1 to 10 ohm-m and magnetic susceptibility of order of 600-5000 x 106 c g s units in the sulphide zones, while in the country rocks values recorded were m the range of 3000-24,000 ohm-m and 50-500 x 106c g s units respectively The diagnostic resistivity response is simply related to the percentage, size and disposition of the sulphide mineralisation The association of high magnetic susceptibility is indicative of pyrrhotite mineralisation in these zones The SP 'high' and 'low' could be due to the electrochemical potential developed at the interface of country rock and ore body Detection IP/ resistivity measurements have also improved the prospective search radius of drill-holes and are successful in assessing qualitatively the lateral extent ol intersected mineralisation.Keywords
Drill-Hole Induced-Polanzation (DHIP), Self-Potential, Magnetic, Geometric Disposition, Rajasthan.- Kigelia africana Fruit Carbon as a Low Cost Adsorbent for Removal of Copper(II) Ions from Aqueous Solution
Authors
1 Department of Applied Sciences, PEC University of Technology, Chandigarh-160 012, IN
Source
Nature Environment and Pollution Technology, Vol 10, No 3 (2011), Pagination: 419-422Abstract
Fruit of Kigelia africana tree is cylindrical and weigh approximately 2.5 kg. A mature tree produces hundreds of fruits every year but not used for any purpose, and hence a waste material in this region. Heating dried fruit powder with 1:1 sulphuric acid at 110°C for 24 h has resulted in carbonaceous material which showed marked adsorption properties. Copper(II) adsorption capacity of this Kigelia africana fruit powder carbon material (KAFP) was found to be 21.74 mg/L and almost 90% removal was achieved by treating 100 mg of adsorbent material in 100 mL (10 mg/L) of Cu(II) solution. Adsorption data fitted well into Langmuir adsorption isotherm equation. Metal uptake was maximum at pH 7 and almost negligible at much lower pH values.Keywords
Kigelia africana Fruit Carbon, Copper Adsorption, Langmuir Adsorption, Isotherm.- The Onset of Thermal Instability in a Triply Diffusive Three Dimensional Fluid Layer in Porous Medium
Authors
1 Department of Mathematics and Statistics, H.P. University, Shimla-5, IN
Source
Research Journal of Engineering and Technology, Vol 3, No 2 (2012), Pagination: 152-160Abstract
An investigation is made on the onset of thermal instability in a triply diffusive three dimensional fluid layer in porous medium , since there are important fluid mechanical systems in which the density depends on three or more stratifying agencies having different diffusivities, in which the onset of convective instability in isothermal ternary and non-isothermal ternary fluids is termed as triple diffusion. Special attention is given to systems with k1 >>k2 , k3 and p1 >>K2/K3 where Ki is the molecular diffusivity of the ith component and Pis the molecular diffusivity of the ith component and p1 is the thermal Prandtl number. The perturbation equations are analyzed in terms of normal modes after linearizing the relevant set of hydrodynamic equations to derive a characteristic equation. For the stationary convection, the stable solute gradients are found to have stabilizing effects on the system, due to which the onset of instability is postponed and the medium permeability parameter has a destabilizing effect on the system..The presence of stable solute gradients and medium permeability parameter also introduce oscillatory modes which were nonexistent in their absence. The case of overstability (with increasing amplitude of perturbations) is also considered and the sufficient conditions for the non existence of stable solutions are derivedr. These analytical results are confirmed numerically and the effects of various parameters on the stability analysis for both the cases of stationary convection and overstability are depicted graphically using the software Mathematica version 2007.Keywords
Thermal Instability, P1, Thermal Prandtl Number, Solute Rayleigh Numbers, Medium Permeability.- Effect of Surface Tension on the Kelvin-Helmholtz Instability of Superposed Viscous Fluids in Hydromagnetics Saturating Porous Medium
Authors
1 Department of Mathematics and Statistics, Himachal Pradesh University, Summer Hill, Shimla -171 005, IN
2 Department of Mathematics, Government Collage, Ghumarwin, District Bilaspur, IN
3 Bahra University Waknaghat Solan, IN
Source
International Journal of Technology, Vol 4, No 1 (2014), Pagination: 1-6Abstract
This paper deals with the instability of viscous superposed, fluids saturating porous medium in the presence of horizontal magnetic field and to include the effect of surface tension. Using linear theory and normal mode technique the dispersion relation so obtained is analyzed mathematically for the stable configuration. The effects of medium porosity, surface tension and magnetic field, on the growth rate (imaginary) of the most unstable mode have been investigated numerically. The square of the Alfven velocity accounting for magnetic field and surface tension have stabilizing effect on the system and medium porosity has destabilizing effect on the system. All these numerical results have been depicted graphically. The results show that the magnetic field and surface tension bring about more stability for a certain wave number band on the growth rate of unstable configuration.
Keywords
Kelvin-Helmholtz Instability, Horizontal Magnetic Field, Surface Tension, Porous Medium.- Utilization of Melia azedarach Fruit Based Adsorbents for the Removal of Heavy Metal Ions from Waste Water
Authors
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
2 Biopharmaceutics and Pharmaceutical Microbiology, Nnamdi Azikiwe University, Awka, PMB 5025, Awka, Anambra State, NG
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1772-1776Abstract
Utilization of Melia azedarach fruit based adsorbents for the removal of heavy metals like Cu (II), Ni (II) was considered. The effect of base treatment on the adsorbent behaviour was also studied. Batch adsorption studies were conducted as a function of solution concentration, adsorbent dose, and contact time at pH 5. Equilibrium adsorption data were fitted to regressed form of Langmuir, Frendlich and Temkin isotherm equations. At room temperature, 100 mg of Melia azedarach adsorbent removed about 95% of Cu (II) ions from the aqueous solution in the concentration range of 10-25ppm. While, 69% to 86% of Ni (II) ions were removed by MA adsorbent under same conditions. Slight increase in metal ions uptake was observed in the case of base treated MA adsorbents. Equilibrium adsorption data for Cu(II) and Ni(II) fitted well in to Freundlich adsorption isotherm.
Keywords
Melia azedarach, Adsorption, Freundlich Isotherm and Pest Free Treated Water.- Influence of Acid Treatments of Sugarcane Bagasse Carbon Sample on the Adsorption of CU (II) and PB (II) Ions from Aqueous Solution
Authors
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1678-1684Abstract
Sugar carbon was prepared from sugarcane bagasse by carbonization with conc. H2SO4. Yield was about 20% by weight. The surface of the original unmodified sugar carbon (UM-carbon) was modified by treatment with 2M HCl (SM-A carbon), 2M NaOH (SM-B carbon) and 50% (v/v) HNO3 (SM-O carbon). Carbon samples were characterized by SEM, FTIR and XRD techniques. Lead and copper adsorption on unmodified and modified sugar carbons from aqueous solution at room temperature (25°C) was studied by batch analysis method. The solution pH was maintained at 5. Nitric acid oxidation of the original sugar carbon increased metal uptake by almost 100% and simple HCl treatment enhanced metal adsorption by about 10%. Adsorption data of both metals fit well in Freundlich adsorption isotherm equation. Lead (II) ions were adsorbed almost in double amounts of copper (II) ions confirming that pore accumulation takes place in addition to ionic interactions in solution.
Keywords
Sugarcane Bagasse, Surface Treatments, Pb and Cu Adsorption, Adsorption Isotherms.- Stability of Stratified Viscoelastic Walters' (Model B′) Fluid/Plasma in the Presence of Quantum Pressure
Authors
1 Department of Mathematics and Statistics, Himachal Pradesh University, Summer Hill, Shimla-171 005, IN