Curso

Procesos litosféricos

Basic knowledge of Metamorphic Petrology and Use of softwares in P-T calculation

Instituto de Geología, UNAM

Metamorphic rocks are the most common rock type on Earth, and their study allows us to put constraints on the pressure, stress and temperature conditions in the crust and mantle, and on the bulk composition in these environments. Metamorphism affects rocks in three ways; it changes their mineralogy, it changes their shape, and it can change their composition. In this course we will look at the processes behind metamorphism, the description, and classification of metamorphic rocks, and how to extract information from metamorphic rocks and minerals to determine the conditions under which they formed.

Metamorphic petrology is important for understanding the processes that take place within the Earth's interior and the history of the Earth's crust. It is also useful for identifying the sources of minerals and other resources that are found in metamorphic rocks. Petrology is important because it tells us about Earth history, it is the key to discovery and development of mineral resources, and because fundamental principles and lessons learned from petrology have applications in modern industry. The study of metamorphic rocks provides us with very valuable information about the temperatures and pressures that occur at great depths within the Earth's crust. Some examples of metamorphic rocks are gneiss, slate, marble, and schist.

OBJECTIVE
To understand the chemistry and mineralogy of metamorphic rocks and to extricate the Pressure-Temperature-Time path experienced by the polymetamorphic rocks with using modern software.

KNOWLEDGE AND SKILLS AT THE END OF THE ACTIVITY

Participants will be able to:

Understand the chemistry and mineralogy of metamorphic rocks.
Calculate the P-T with modern softwares.
Interpret information derived from thin-section and hand-specimen analysis.
Demonstrate reasoning based on evidence from mineralogy and chemistry of rocks.
Write scientific descriptions of rock samples (Spanish)

PARTICIPANT PROFILE

Students, professors, researchers, and professionals who have backgrounds in metamorphic petrology (Metamorphic rocks, Metamorphism and Thermobarometry) and are interested in the subject. The course will be in English (Level B1), so English knowledge is required. Also need to install Perple_X software (a free software) (https://www.perplex.ethz.ch/). Other softwares will be provided by mail.

OBTAINING CONSTANCE

Students needs to attend at least 80% of classes.
Attendance: 80%v
Minimum grade: 7 (assignment 50%, Exercises 50%)

Topic 1. Introduction of Metamorphic Rocks - 2 h
1.1 Metamorphic petrology an Overview
1.2 Definition, limits, factors which controlling metamorphism
1.3 Classification of metamorphic

Topic 2. Texture of Metamorphic Rocks and Ultra- High Temperature Metamorphism - 2 h
2.1 Different textures
2.2 Reaction textures
2.3 Ultra- High Temperature Metamorphism

Topic 3. Geothermbarometry - 2 h
3.1Importance of Pressure-Temperature
3.2 P-T-t path
3.3 Basic concepts of Thermodynamics

Topic 4. Software for P-T Calculation - 2 h
4.1Introduction of TWQ
4.2 Introduction of GPT software

Topic 5. Software for P-T Calculation - 2 h
5.1 Introduction of PERPLE_X

Recommended bibliographical references:

Berman, R.G., 1991, Thermobarometry using multi-equilibrium calculations: a new technique with petrological applications, Canadian Mineralogist, 29, 833-855.
Best, M.G., 2003, Igneous and Metamorphic Petrology by Blackwell Science Ltd. https://doi.org/10.1017/S0016756805360432
Connolly, J.A.D., 2005, Computation of phase equilibria by linear programming: a tool for geodynamic modeling and its application to subduction zone decarbonation, Earth and Planterary Science Letters, 236, 524-541. https://doi.org/10.1016/j.epsl.2005.04.033
Connolly, J.A.D. and Petrini, K., 2002, An automated strategy for calculation of phase diagram sections and retrieval of rock properties as a function of physical conditions, Journal of Metamorphic. Geology, 20, 697-708. https://doi.org/10.1046/j.1525-1314.2002.00398.x
Philpotts, A.R., and Ague J.J., 2009, Principles of Igneous and Metamorphic Petrology. CambridgeUniversityPress http://assets.cambridge.org/97805218/80060/frontmatter/9780521880060_frontmatter.pdf
Prakash, D., Prakash, S., Sachan, H.K., 2010, Petrological Evolution of the High-Pressure and Ultrahigh-Temperature mafic granulites from Karur, Southern India: Evidence for decompressive and cooling retrograde trajectories, Mineralogy and Petrology. 100, 35-53. https://doi.org/10.1007/s00710-010-0123-9
Yadav, R., Prakash, D., Rai, S. K., Yadav, M. K., Jaiswal, S., Singh, Singh P.K., Kumar M., Singh, C. K., 2021, Ultrahigh-temperature decompression of sapphirine-granulites from the southern Madurai block (South India): Insights from geothermobarometry, pseudosection modelling and U-Pb geochronology. Journal of Asian Earth Sciences, 218, 104861. https://doi.org/10.1016/j.jseaes.2021.104861

$0.01 mxn

Participantes
nacionales

Cost: Free access

**UNAM reserves the right to change the date of the activity depending on the minimum capacity**

Nivel Intermedio

10 hours
Monday to Friday. 12:00 to 14:00 hours Mexico City time

22 abr 2024 al 26 abr 2024
Ver calendario

Online Zoom

Cupo: 15 MINIMUM participantes

5 Topics

REGISTRATION DEADLINE: April 19, 2024, 4:00 p.m

Full, no places available