GG
- Geology and Geophysics
PART - I
Earth and Planetary system; size, shape, internal structure and composition
of the earth; atmosphere and greenhouse effect; isostasy; elements of
seismology; pressure in deep interior of planets; continents and continental
processes; physical oceanography; paleomagnetism, continental drift, plate
tectonics.
Weathering; soil formation; action of river, wind and glacier; oceans
and oceanic features; earthquakes, volcanoes, orogeny and mountain building;
elements of structural geology; crystallography; classification, composition
and properties of minerals; elements of petrology; engineering properties
of rocks and soils, role of geology in the construction of engineering
structures.
Introductory processes of ore formation, broad occurrence and distribution
of ore deposits; coal and petroleum resources in India; ground water geology
geological time scale and geochronology; stratigraphic principles and
stratigraphy of India; basic concepts of gravity, magnetic and electrical
prospecting for ores and ground water.
PART - II A: GEOLOGY
Crystal symmetry, forms, twinning; crystal chemistry; optical mineralogy,
classification of minerals, diagnostic physical and optical properties
of rock forming minerals.
Igneous rocks � classification, forms and textures,
magmatic differentiation; phase diagrams and trace elements as
monitors of magma evolutionary processes; mantle melting models and derivation
of primary magmas. Metamorphism: controlling factors, metamorphic facies,
grade and baric types; metamorphism of pelitic, mafic and impure carbonate
rocks; role of fluids in metamorphism; metamorphic P-T-t paths and their
tectonic significance; Igneous
and metamorphic provinces of India; structure and petrology of sedimentary
rocks; sedimentary processes and environments, sedimentary facies, basin
studies; association of igneous, sedimentary and metamorphic rocks with
tectonic setting.
Stress, strain and material response; brittle and ductile deformation;
primary and secondary structures; geometry and genesis of folds, faults,
joints, unconformities; cleavage, schistosity and lineation; methods of
projection, tectonites and their significance; shear zone; superposed
folding; basement cover relationship.
Morphology, classification and geological significance of important
invertebrates, vertebrates, microfossils and palaeoflora; stratigraphic
principles and Indian stratigraphy; geomorphic processes and agents; development
and evolution of landforms; slope and drainage; processes on deep oceanic
and near-shore regions; quantitative and applied geomorphology; air photo
interpretation and remote sensing; ore mineralogy and optical properties
of ore minerals; ore forming processes vis-�-vis ore-rock association
(magmatic, hydrothermal, sedimentary and metamorphogenic ores); ores and
metamorphism; fluid inclusions as an ore genetic tool; prospecting and
exploration of economic minerals; sampling, ore reserve estimation, mining
methods; coal and petroleum geology; origin and distribution of mineral
and fuel deposits in India; marine geology and ocean resources; ore dressing
and mineral economics.
Cosmic abundance; meteorites; geochemical evolution of the earth; geochemical
cycles; distribution of major, minor and trace elements; elements of geochemical
thermodynamics, isotope geochemistry; geochemistry of waters including
solution equilibria and water rock interaction.
Engineering properties of rocks and soils; rocks as construction material;
geology of dams; tunnels and excavation sites; natural hazards; ground
water geology and exploration and well hydraulics; water quality; basic
principles of remote sensing � energy sources and radiation principles,
atmospheric absorption, interaction of energy with various features of
the earth's surface. GIS � basic concepts, raster and vector mode operation,
digital processing of satellite images, visual and microwave remote sensing;
elements of Geostatistics
PART - II B: GEOPHYSICS
The earth as a planet; different motions of the earth; gravity field
of the earth and its shape; geochronology; seismology and interior of
the earth; variation of density, velocity, pressure, temperature, electrical
and magnetic properties of the earth; earthquakes-causes and measurements;
magnitude and intensity, focal mechanisms, earthquake quantification,
source characteristics, seismotectonics and seismic hazards; digital seismographs,
paleoseismology, geomagnetic field, paleomagnetism; oceanic and continental
lithosphere; plate tectonics; heat flow; upper and lower atmospheric phenomena.
Theories of scalar and vector potential fields; Laplace, Maxwell and
Helmholtz equations for solution of different types of boundary value
problems in Cartesian, cylindrical and spherical polar coordinates; Green's
theorem; Image theory; integral equations and conformal transformations
in potential theory; Eikonal equation and Ray theory.
'G' and 'g' units of measurement, density of rocks, gravimeters, Bouguer
gravity formula, various corrections to gravity data, free air, Bouguer
and isostatic anomalies, regional and residual gravity separation, upward
and downward continuation, preparation and analysis of gravity maps; gravity
anomalies and their interpretation; calculation of mass, airborne, shipborne
and bore-hole gravity surveys.
Earth's magnetic field, units of measurement, magnetic susceptibility
of rocks, magnetometers, corrections, preparation of magnetic maps, upward
and downward continuation, magnetic anomalies and their interpretation;
magnetic anomalies and their interpretation.
Conduction of electricity through rocks, electrical conductivities of
metals, metallic, non-metallic and rock forming minerals, D.C. resistivity
units and methods of measurement, electrode configuration for sounding
and profiling, application of filter theory, interpretation of resistivity
field data, application; self potential origin, classification, field
measurement, interpretation of induced polarization time frequency, phase
domain; IP units and methods of measurement, interpretation and application;
ground-water exploration.
Origin of electromagnetic field, elliptic polarization, methods of measurement
for different source-receiver configuration components in EM measurements,
skin-depth, interpretation and applications; earth's natural electromagnetic
field, tellurics, magneto-tellurics; geomagnetic depth sounding principles,
electromagnetic profiling, methods of measurement, processing of data
and interpretation.
Seismic methods of prospecting: Reflection, refraction and CDP surveys;
land and marine seismic sources, generation and propagation of elastic
waves, velocity increasing with depth, geophones, hydrophones, recording
instruments (DFS), digital formats, field layouts, seismic noises and
noise profile analysis, optimum geophone grouping, noise cancellation
by shot and geophone arrays, 2D and 3D seismic data acquisition, processing
and interpretation; CDP stacking charts, binning, filtering, dip-moveout,
static and dynamic corrections, migration, signal processing, attribute
analysis, bright and dim spots, seismic stratigraphy, high resolution
seismics, VSP, AVO.
Principles and techniques of geophysical well-logging, SP, resistivity,
induction, gamma ray, neutron, density, sonic, temperature, dip meter,
caliper, nuclear magnetic, cement bond logging, micro-logs. Quantitative
evaluation of formations from well logs; well hydraulics and application
of geophysical methods for groundwater study; application of bore hole
geophysics in ground water, mineral and oil exploration.
Radioactive methods of prospecting and assaying of minerals (radioactive
and non radioactive) deposits, half-life, decay constant, radioactive
equilibrium, G M counter, scintillation detector, semiconductor devices,
application of radiometric for exploration and radioactive waste disposal.
Geophysical signal processing, sampling theorem, aliasing, Nyquist frequency,
Fourier series, periodic waveform, Fourier and Hilbert transform, Z-transform,
power spectrum, delta function, auto correlation, cross correlation, convolution,
deconvolution, principles of digital filters, windows, poles and zeros.
Geophysical inverse problems: non-uniqueness and stability of solutions;
quasi-linear and non-linear methods including genetic algorithms and artificial
neural network.
|