TGB4130 - Petrology


Examination arrangement

Examination arrangement: Written examination
Grade: Letters

Evaluation form Weighting Duration Examination aids Grade deviation
Written examination 100/100 4 hours D

Course content

The petrology part of the course includes igneous and metamorphic processes and rocks. The geochemical part of the course focuses on isotope geochemistry and application of isotopes to the understanding of age and origin of igneous and metamorphic rocks. The compulsory exercises used to rock microscopy (2E) and hand-specimen petrography, interpretation of phase diagrams and geochemical data processing (1E). One excursion are included in the subject. More information will be provided at the start of the course.

Learning outcome

At the final written exam should be able to follow in these subthemes:

Metamorphic petrology:
You should understand and be able to use fase grids, inklusive petrogenetic grids, chemographic projections and pseudosections to interpret mineral reactions and metamorphic PT conditions in the earth. You should also understand and be able to explain the advantages / disadvantages and limitations of the various methods. The course will be added very little score weight of metamorphosed mafic rocks and pelitic rocks. These include not only the formation of new mineral assemblages but also changes in mineral chemistry as a function of pressure, temperature and fluid composition.

Igneous petrology:
The course provides an introduction to the use of main and trace element geochemistry and isotopes (Rb / Sr, Sm / Nd, U / Pb) to understand the origin, age and development of various types of magma. These methods form the foundation for the introduction of magmatic activity in different tectonic environment, with emphasis on mid-ocean ridges and oceanic and continental subduction zones.

You will also be able to understand and apply the common igneous binary and ternary phase diagrams and determine mineral and melt amounts using lever rule of equilibrium crystallization. Moreover, you should also be able to use charts to predict both equilibrium crystallization path and fractional crystallization from a given starting composition of the melt.

The mandatory assignments during the semester will make the student able to:

Design petrographic descriptions (rock descriptions) of metamorphic and igneous rocks through the thin section and hand specimen. You should be able to apply your observations to interpret the formation of igneous and metamorphic rocks by igneous and metamorphic phase diagram.

Make larger geochemical calculations using computer tools (spreadsheets and maybe matlab and Cspace) and interpret the significance of the result.

Learning methods and activities

Lectures, exercises and field training. There are compulsory practical tests as part of the exercises. These tests do not count in the final grade in the course, but the test must be passed in order to take the written exam (which counts 100%). Fieldwork may be scheduled for a weekend. The course is evaluated by a reference group.

Compulsory assignments

  • Field trip
  • Exersices

Further on evaluation

If there is a re-sit examination, the form of assessment may be changed from written to oral.

Specific conditions

Exam registration requires that class registration is approved in the same semester. Compulsory activities from previous semester may be approved by the department.

Course materials

Information will be given at the start of the semester.

Credit reductions

Course code Reduction From To
SIG0513 7.5
More on the course



Version: 1
Credits:  7.5 SP
Study level: Third-year courses, level III


Term no.: 1
Teaching semester:  SPRING 2021

No.of lecture hours: 4
Lab hours: 4
No.of specialization hours: 4

Language of instruction: Norwegian

Location: Trondheim

Subject area(s)
  • Petrology
  • Geology
  • Technological subjects
Contact information
Course coordinator: Lecturer(s):

Department with academic responsibility
Department of Geoscience and Petroleum



Examination arrangement: Written examination

Term Status code Evaluation form Weighting Examination aids Date Time Digital exam Room *
Spring ORD Written examination 100/100 D INSPERA
Room Building Number of candidates
  • * The location (room) for a written examination is published 3 days before examination date. If more than one room is listed, you will find your room at Studentweb.

For more information regarding registration for examination and examination procedures, see "Innsida - Exams"

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