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APPLIED GEOPHYSICS

EUSEBIO MARIA STUCCHI

Academic year2022/23

CourseAPPLIED AND EXPLORATION GEOPHYSICS

Code230DD

Credits6

PeriodSemester 2

LanguageEnglish

CourseAPPLIED AND EXPLORATION GEOPHYSICS

Code230DD

Credits6

PeriodSemester 2

LanguageEnglish

Programma non disponibile nella lingua selezionata

Learning outcomes

Knowledge

Learn the basic knowledge concerning the main geophysical methods for the subsurface exploration and the physical principles which form the basis for each of these methods.

The student is able to evaluate autonomously the geophysical methodologies

that can be applied for exploration purposes, knowing the advantages, the disadvantages and the limitations.

Skills

The acquired knowledge allows to approach correctly the design and the implementation of a geophysical survey carried out to give an answer to a problem in the field of Applied Geophysics.

Behaviors

The student is able to clearly communicate to third party the topics of the

Applied Geophysics, the difficulties encountered in the application of the different methodologies and the possible solutions. He/her is able to interact with the experts in this field.

Prerequisites

Basic knowledge of physics and mathematics

Teaching methods

Oral Lessons. Practical applications of some methods will be done in the field campaign of the Exploration and Applied Geophysics Master Degree.

Syllabus

Course content

Gravity surveying: Outlines of the Earth’s gravity field; absolute and relative gravity measurements; Bouguer’s, free air and topographic corrections; field procedures; Bouguer’s anomaly; density of rocks; examples of theoretical anomalies; elements on interpretation.

Magnetic Surveying: The magnetic induction field B and the magnetic field H and their dipolar nature; the induced magnetization vector and the magnetic susceptibility; the remnant magnetization; the susceptibility of the rocks; outline of the Earth's magnetic field; the magnetometer; measure of the magnetic field; magnetic anomaly; elements on interpretation. Examples

Electrical surveying: Electrical conduction in rocks; Ohm’s law, Archie’s law; electrical field generated by a point electrode on the surface of a homogeneous, isotropic half-space; conditions at the discontinuity boundary between two media; electrical quadrupole and apparent resistivity; arrays. Vertical electrical soundings; constant separation traverse; electrical resistivity tomography; elements on interpretation; examples. Induced polarization. Self potential method.

Seismic surveying: elements on the elastic properties of rocks, on the wave equation and on the body and surface waves; seismic wave velocity in rocks; spherical divergence and adsorption; Snell's law; traveltimes of reflected and head waves; elements on seismic sources, receivers and spread layout; refraction seismic (reciprocal spreads, simple interpretation methods, examples);

Multichannel analysis of surface waves: physical principles of surface waves generation and propagation; geometrical spreading of surface waves; dispersion curves, their computation and inversion. Synthetic and real examples.

Bibliography

An Introduction to Applied and Environmental Geophysics, Reynolds, 2011

Applied Geophysics, 2nd ed, Telford, Geldart, Sheriff, 1990

Environmental and Engineering geophysics, Sharma, 1997

An introduction to geophysical exploration, Keary, Brooks and Hill, 2002

Applied Geophysics, Zanzi, 2008

Near-Surface Applied Geophysics, Everett, 2013

Assessment methods

The exam consists of an oral interview with the teacher

Work placement

Many students will find job in small companies whose activities are relate to near surface investigations.

Additional web pages

https://polo3.elearning.unipi.it/

Course 230DD WGF-LM

Updated: 29/07/2022 11:12

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