LECTURE OUTLINE GEOL 384.3 and 334.3, Term 2
Gravity, Magnetic, Electromagnetic, and
Radiation Methods
Instructor:
Igor
Morozov (Geology Rm 142; Tel. 966-2761), igor.morozov@usask.ca,
No face-to-face office hours during this term; however, you are welcome to
communicate by email
Course web page:
http://seisweb.usask.ca/classes/GEOL384-334/2021/WWW/index.html
Course texts:
(Required for GEOL334.3 and recommended for GEOL384.3): Reynolds, J. M., 2011, An Introduction to Applied and Environmental
Geophysics, 2-nd edition, John Willey & Sons
Optional: Dentith, M. and Mudge, S. T., 2014. Geophysics for the Mineral
Exploration Geoscientist, Cambridge Univ. Press
Other good texts:
-
Telford, Geldart
and Sheriff, 1991, Applied
Geophysics 2-nd Ed.
- Dobrin, M.B.
and Savit, C.H. 1988. Introduction to Geophysical Prospecting, 4th ed. McGraw-Hill,
867 p.
- Milsom, J., Eriksen, J. A. 2011,
Field Geophysics, 4-th edition., John Willey & Sons
- Blakeley, R.J., 1995. Potential theory in gravity and magnetic
applications, Cambridge Univ. Press
-
Sheriff, R. E.
1978. A first course in geophysical exploration
and interpretation.
Syllabus:
WEEK 1 (Jan 12-19) - Introduction (lecture;
the same as video)
- Similarities and differences between geophysical methods
- Key properties of potential fields
- Ambiguity and resolution
- Signal and noise
- Measurement errors
- Densities and resistivities of earth materials
WEEKS 2 and 3 (Jan 19 - Feb 2) - Gravity methods (lecture
1, lecture 2; the same as
video
1, video 2)
-
Gravity measurement and reduction
- Gravity corrections
- Estimation of terrain density
Interpretation of structure and source parameter estimation in gravity and magnetics (lecture;
video)
- Location and depth estimation methods
- Excess mass
WEEK 4 (Feb 2 - 9) - Introduction to Electrical methods (lecture
1, lecture 2; the
same as video 1, video
2)
- Electrical properties of rocks
- Relations to composition, porosity, and pore fluid
WEEK 5 (Feb 9 - 16) - Resistivity methods (lecture,
video)
- Resistivity surveys, arrays
- Pseudo-depth, pseudo-sections
WEEK 6 (Feb 16 - 23) - Self-potential (SP) and Induced-polarization (IP) methods (lecture,
video)
- Streaming potential
- Salinity potential
- Electrochemical properties, causes
of IP
- Interpretation of IP
WEEK 7 (Feb 23 - Mar 2) - Mid-term break
WEEK 8 (Mar 2 - 9) - Magnetic methods (lecture,
video)
- Magnetic properties of earth materials
- Relation to gravity and electrostatics
- Magnetic surveying
- Interpretation
WEEKS 9-10 (Mar 9 - 23) Electromagnetic methods (EM) (lecture
1, lecture 2; the
same as video 1, video
2)
- Electromagnetic induction
-
Electromagnetic waves
-
Skin depth
-
Types of EM surveys
- Time- and frequency-domain EM
- Very low frequency EM (VLF)
- Magneto-telluric (MT) methods
WEEK 11 (Mar 23 - 30) - Radiometric methods (lecture,
video)
- Radioactive elements in geologic environment
- Radiactivity and its measurement in the field
- Reduction of radiometric data
- Interpretation of radiometric data
WEEK 12 (Mar 30 - Apr 6) - Applied seismic methods (lecture,
video)
- Relation to other geophysical methods
- Elasticity of earth materials
- Seismic waves and wave speeds
- Impedances and reflectivity
- Refraction seismic method
- Reflection seismic method
- Surface wave method (MASW)
WEEK 13 - Review and preparation to exam