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Fundamentals of stress and strain; rock rheology in crustal environments; mechanics of brittle fracturing and faulting; ductile fabric development; shear zones; folding; polyphase deformation; structural principles in engineering geology.
This paper centres around devloping practical skills in structural geology to help understand the broad field of rock deformation. The paper focuses on the fundamentals of describing the geometry of structures and interpreting these in terms of the kinematics and dynamics of rock deformation. The paper aims to provide a solid base for students wishing to use structural geology in research or applied science. The paper involves some student groups conducting some unique laboratory experiments that enhance significantly student understanding of rock deformation processes and contribute to ongoing research in the department. Critical reading of scientific literature is a cornerstone of this paper.
|Paper title||Rock Deformation|
|Teaching period||Not offered in 2022 (On campus)|
|Domestic Tuition Fees (NZD)||$1,110.75|
|International Tuition Fees||Tuition Fees for international students are elsewhere on this website.|
- GEOL 252
- GEOL 275
- Schedule C
Background requirements: Students should know the basics of all fields of Geology (first-year level). GEOL275 is for students in their second year of a geology or equivalent degree. GEOL375 is for students in their third year of a geology or equivalent degree. Much of the work will involve quantitative approaches, and students will be given support in cementing and improving their numeracy skills.
- More information link
- Teaching staff
- Paper Structure
- Stresses in rock masses; Mohr diagrams for stress
- Faulting, fracture and friction; Griffith crack propagation; Byerlee friction; cataclasis
- Engineering application of stress/failure analysis
- Strain and strain analysis
- Strain paths, strain symmetry and kinematics; shear zones
- Folds, fabrics and fractures in the field; hand samples and thin section
- Fold geometry, kinematics and mechanisms
- Sandbox experiments to simulate fold thrust belt kinematics
- Restoring deformed sequences to establish stratigraphy and palaeogeography
- Creep rheology of Earth materials
- Microstructures of rocks after creep
- Deformation mechanisms, recovery and recrystallisation
- Ice creep experiments to aid understanding of rock rheology and microstructure
- Quartz microstructures from the Alpine Fault zone
- Lithosphere scale mechanics/rheology
Assessment is approximately an even split between internal (ongoing during the semester) and external (final exam).
Assessments for GEOL375 are graded differently to GEOL275 to reflect greater background knowledge and higher expectations of students taking the paper at 300-level.
- Teaching Arrangements
- Two lectures and one 3-hour laboratory per week.
Fieldwork: Day fieldclass to Otago coastline.
- Fossen, H. 2010 Structural Geology. Cambridge University Press., 460pp. Or newer second edition.
- Course outline
- Graduate Attributes Emphasised
- Critical thinking, Information literacy, Research, Self-motivation, Teamwork.
View more information about Otago's graduate attributes.
- Learning Outcomes
- Students should leave this paper with a level of knowledge of rock deformation that
includes the specific skills listed below:
- Ability to characterise and quantify the geometry of common geological structures (faults, folds, shear zones, fabrics) on a range of scales from maps through outcrop and hand samples to microscopic
- Understand the basic physics of rock deformation, including stress-strain relationships and how they may be measured
- Ability to develop kinematic models from geometrical data and understanding of what is needed to develop a dynamic model
- Ability to design their own structural investigation of deformed rocks
- Appreciation of observational science, including fieldwork, experimental approaches and modelling as tools to understand rock deformation
- Quantitative techniques and problem solving
- Scientific literacy