Geowissenschaften

This course is part of the international master's degree program Climate, Earth, Water, Sustainability (CLEWS). The module provides an understanding of environmental processes and driving forces of the climate system through earth history and deals with the following aspects: geological approaches, climate archives, palaeoecological approaches, proxy records, modelling approaches, icehouse stages and greenhouse stages in earth history, climate variability at long to short time scales, abrupt climate changes, role of the global carbon cycle through time, biospheric-geospheric interactions. The module comprises a lecture series, a seminar with poster presentations by the students, and geological field exercises.



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Das ist die Moodle-Seite des Kurses GEW-B-P03 - Einführung in die Geowissenschaften III - Sedimentäre Systeme im Wintersemester 22/23

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This module aims to familiarise students with current ideas about the structure and mechanical behaviour of the lithosphere, in terms of its thermal structure and rheology. The forces driving plate tectonics, the rheology of the lithosphere, the dynamics of orogenic processes, numerical modelling of deformation of the lithosphere, as well as the coupling between mantle dynamics and surface processes are covered.

Through following this course, students:

- gain an understanding of the structure and dynamics of the lithosphere and the forces driving its deformation

- gain familiarity with modern quantitative methods for observing and modelling the deformation of the lithosphere and its driving forces

- learn to analyse modern research questions in tectonics and geodynamics by studying the literature on a chosen topic

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Das Modul vermittelt grundlegende Kenntnisse zu Wärmetransportvorgängen und die daraus resultierende Wärme- und Temperaturverteilung der Erdkruste. Neben theoretischen und physikalischen Grundlagen zu thermischen Gesteinsparametern und thermischen Feldern werden gängige Verfahren zur Bestimmung der thermischen Eigenschaften vorgestellt; dabei wird auf die Gewinnung und Bearbeitung der (Mess-) Daten und die Interpretation der Resultate eingegangen.

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Radiogenic Isotopes are important geochemical tools. The decay of a radioactive isotope eventually produces a stable (radiogenic) isotope. This process changes the isotopic composition of elements with one or several radiogenic isotopes. This change in isotopic composition can be used in two ways: (i) The concentration ratio of the produced daughter isotope to the present parent isotope can be used to determine the age of minerals and indirectly of geological processes. Systems suitable for the dating of geologically old magmatic and metamorphic rocks include among others the parent-daughter pairs of 40K-40Ar, 87Rb-87Sr, 147Sm-144Nd, and 238U-206Pb. (ii) The isotopic composition of elements with radiogenic isotopes changes through time. Because different geochemical reservoirs have contrasting parent-to-daughter ratios, they will with time develop different isotopic compositions, which in turn can be used to fingerprint the sources of rocks or to quantify contributions from different reservoirs by mass balance.
The class is presenting the most commonly used systems for isotopic dating and provides examples on the use of radiogenic isotopes as geochemical tracers. There will be reading assignments and short presentations by students in each following part:

Rb-Sr, Sm-Nd, Lu-Hf, Re-Os and U-Pb systems, by apl. Prof. Dr. Rolf Romer
K-Ar system and Ar/Ar dating, noble gas isotopes, by Dr. Masafumi Sudo    

We start the first lecture (90 minutes) from 16:15 on the October 18th, at the room 2.07 of House 27.
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Introduces the basic concepts of nonlinear dynamics and chaos and how they can be applied for the study of complex systems, spatiotemporal data, and nonlinear interrelationships in geosciences. Methods based on information theory, recurrences properties, and complex networks are taught and their potentials are demonstrated. The fundamentals of statistical tests are introduced and how to construct appropriate statistical tests for specific applications are discussed.

The specific topics contain
  • Basic terminology, dynamical systems, and simple prototypical models
  • Dimensions, fractals
  • Concept of symbolic dynamics
  • Concept of phase space, phase space reconstruction, Lyapunov exponent and correlation sum
  • Concept of recurrence in phase space, recurrence plots, recurrence quantification analysis
  • Detection of regime transitions, statistical tests
  • Concept of synchronization, coupling analysis
  • Spatial and spatio-temporal data analysis using recurrence features
  • Complex networks, network models, measures, network representations
  • Functional networks, reconstruction of networks, climate networks
  • Complex networks based time series analysis

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This course will cover the fundamentals of organic geochemistry, which is the discipline that studies the origin, conversion and fate of organic matter on Earth, and attempts to reconstruct the impact and processes that the biosphere had on the Earth system. In lectures we will cover (amongst other themes) carbon fixation and bioproductivity, aspects of lipid biosynthesis, biomass burial and the global carbon cycle, the formation and composition of fossil fuels, paleoclimate reconstructions, environmental geochemistry and what ancient molecules tell us about the evolution of life on Earth. In the practical part of the course, we will gain hands-on experience by processing rock samples, extracting and simplifying their molecular organic inventory and analyzing the latter using gas chromatography and mass spectrometry, followed by interpretation of fossil biomarker molecules.

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