Geophysics I

1. Explain the theoretical background of gravity and magnetic methods.
2. Describe the working principles of geophysical instruments.
3. Explain gravity and magnetic field procedures, data processing, and interpretations.
4. Discuss density determination and variations within the solid earth.
5. Explain the origin and properties of geomagnetism.

13 weeks, about 88 hours in total. Yours will differ.

1. Week 1Module 1: The earth: internal structure and construction: Density of Rocks and Ores.

   • Unit 1: Origin of the Earth · 3 hours

     Read about the cold and hot origin theories of the earth.. Identify characteristics differentiating Earth from other planets.. Explain the causes and effects of the Iron Catastrophe..

   • Unit 2: Motions of the earth · 3 hours

     Describe the three main types of motion of the earth.. State the effect of each of the three motions.. Explain the cause of the density variation of the solid earth..

2. Week 2Module 1: The earth: internal structure and construction: Density of Rocks and Ores.

   • Unit 3: The internal and external structures of the earth. · 3 hours

     Study Earth models based on chemical composition and material flow.. Examine evidence of inhomogeneity of the Earth's crust.. Describe the global distribution and surface sequences of oceans and continents..

   • Unit 4: Variation of some physical properties within the solid earth · 3 hours

     Describe the trend of variation of pressure, density, gravitational field, and seismic velocity with depth.. Derive mathematical relations for the variation of parameters.. Apply the mathematical formulas to real-life events..

3. Week 3Module 1: The earth: internal structure and construction: Density of Rocks and Ores.

   • Unit 5: Rocks and Minerals · 3 hours

     Define Rock and Minerals.. Classify rocks based on origin, Mineral contents porosity and consolidation.. List the characteristics of rocks..

   • Unit 6: Density · 3 hours

     Define and classify types of density.. Calculate density using its mathematical formulas.. Explain laboratory measurement of density of rocks..

4. Week 4Module 2: Geomagnetism: Origin, properties of rock

   • Unit 1: Basic facts in magnetism · 4 hours

     Define magnetic field.. List three mutually dependent parameters in magnetism.. Explain the three methods of producing a magnet..

   • Unit 2: Characteristics of Magnetism in Rocks' Components · 4 hours

     Define magnetic susceptibility and permeability.. List types of Rocks' magnetism.. Differentiate the rocks magnetism using their properties..

5. Week 5Module 2: Geomagnetism: Origin, properties of rock

   • Unit 3: Magnetisation in Earth's Rocks · 4 hours

     Define Palaeomagnetism.. Explain residual magnetism in rocks.. Mention and explain various mechanisms of remanent magnetism..

   • Unit 4: Magnetic Measurement · 4 hours

     Explain the following: Magnetic force, Field strength, Moment, Intensity of magnetism, Susceptibility and Magnetic induction. Sketch a uniformly magnetised and polarised body.. State the practical units of magnetic parameters like susceptibility, intensity and induction..

6. Week 6Module 3: Gravity Methods:

   • Unit 1: Newton's gravitation and Application · 6 hours

     Differentiate gravitational field from acceleration due to gravity.. Explain the two ways by which g can be measured.. Determine absolute gravity for a point B, given the absolute gravity at a reference point A and gravity difference measured at B..

7. Week 7Module 3: Gravity Methods:

   • Unit 2: Gravity Instrument · 6 hours

     List types of gravimeters.. Sketch LaCoste-Romberg gravimeter.. Explain the calibration procedure..

8. Week 8Module 3: Gravity Methods:

   • Unit 3: Gravity field work · 6 hours

     Demonstrate field observational sequences for gravity survey.. Make proper fieldwork preparation for gravity survey.. Recommend a suitable field survey that can be used for specific purposes in gravity survey..

9. Week 9Module 3: Gravity Methods:

   • Unit 4: Gravity Data Processing · 6 hours

     List steps to be followed in gravity data processing.. Describe various correction procedures in gravimetric works.. Explain gravity anomaly..

10. Week 10Module 3: Gravity Methods:

    • Unit 5: Gravity Data interpretations · 6 hours

      Differentiate qualitative from quantitative interpretation.. Explain map contouring.. Define gravity total field..

11. Week 11Module 4 Magnetic methods

    • Unit1: Theory, concept and instruments · 4 hours

      Explain the working principle of proton magnetometer.. List advantages of proton magnetometer.. State the practical units employed in magnetic prospecting..

    • Unit 2: Magnetic Survey · 4 hours

      Discuss the types of magnetic surveys.. Mention the necessary instruments and materials needs in readiness for the field works.. Explain pre-field determination and detection of geomagnetic variations..

12. Week 12Module 4 Magnetic methods

    • Unit 3 Magnetic Data Processing · 4 hours

      Identify sources of errors to magnetic field data.. Explain ways for correcting the errors identified.. Describe continuation processes on potential field..

    • Unit 4: Qualitative Interpretation of Magnetic data · 4 hours

      List the required informations necessary for qualitative interpretation of magnetic anomaly.. Mention the geologic features that can be mapped using magnetic survey.. Derive useful information from magnetic anomaly maps..

13. Week 13Module 4 Magnetic methods

    • Unit 5: Quantitative interpretation of magnetic data · 8 hours

      Study the concepts of quantitative interpretation of magnetic data..