2025

Geochemical Systems

Name: Geochemical Systems
Code: GEO00761L
6 ECTS
Duration: 15 weeks/156 hours
Scientific Area: Geosciences

Teaching languages: Portuguese
Languages of tutoring support: Portuguese

Sustainable Development Goals

Learning Goals

General understanding of the biogeochemical processes that couple the lithosphere, hydrosphere, atmosphere and biosphere, including chemical aspects of the Earths formation and development to its present state;
Capability to apply thermodynamics to geological problems involving several types of phase - solids, aqueous solutions, gases and melts
Figure out some of the recent areas of geological research where isotope geochemistry is having a significant impact
Acquisition of practice numerical skills by performing quantitative thermodynamic and isotopic calculations applicable to the earth sciences
Comprehend the Earth from a geochemical perspective by studying topics such as formation of the elements; formation of the Earth and Solar System; evolution of the crust, mantle, and core;
weathering, stream chemistry and ocean chemistry.
Understanding of some of the chemical active processes in the Earths surface environment as element cycli

Contents

Introduction
Energy, Entropy, and Fundamental Thermodynamics Concepts
Applications of Thermodynamics to the Earth
Equilibrium Constant, Oxidation and Reduction, Eh-pH diagrams and the stability of the
minerals
Phase Diagrams and Geothermometry
Reaction Kinetics
Aquatic Chemistry: Acid-Base Reactions, Complexation, Precipitation and Dissolution,
Adsorption
Surface Reactions and Diffusion
Stable and Radiogenic Isotope Geochemistry
Introduction to Cosmochemistry: Chemical Clues to the Formation of the Earth
Geochemistry. of the Solid Earth: The Mantle and Core
Geochemistry of the Solid Earth: The Crust
Reactions at the Earths Surface: Weathering, Soils, and Stream Chemistry
Organic Geochemistry
The Oceans as a Chemical System
The atmosphere as a Chemical System
Bio-geo-chemical cycles: Nitrogen, phosphorus, carbon dioxide and oxygen;
Introduction to envir

Teaching Methods

Teaching involves lectures and practical classes. In the first, the principles for understanding the studied processes will be given: Practical classes will offer the tools to study the same processes and materials involved.
The classes will be presented by members of the University of Évora, occasionally being invited guest speakers to teach specific topics as seminars.
The evaluation will consider an exam (40%), a laboratory component (40%), writing a review paper (15%) and its oral presentation (5%).