Interpretation of Seismic reflection profiles (@IPMA SEISLAB 20122024)

18 Dezembro 2024, 15:00 • Pedro Antonio Gancedo Terrinha

1. Finalizing the interpretation of the seismic profiles.

2. Consolidate the selection of topics for the final report

3. Discuss and conclude on the interpretation of the selected seismic profiles

4. Decide on images and main contents to report.

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Tectonics of rift basins and salt tectonics. Foreland basins. Mechanisms for basin formation.

18 Dezembro 2024, 11:00 • Pedro Antonio Gancedo Terrinha

Summary of some principles of tectonics of rift basin, salt tectonics and weak layers (or detachment levels). Foreland basins: flexure of the lithosphere and wedge tectonics. Strike-slip basins: releasing bends and restraining bends. Fundamental mechanisms of generation of the accommodation space for basin formation.

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Seismic reflection profiles

13 Dezembro 2024, 09:00 • Pedro Antonio Gancedo Terrinha

1. Continuation of interpretation of the seismic profiles.

2. Selection of main topic for the final report

3. Discuss and conclude on the interpretation of the selected seismic profiles

4.. Start drafting the contents of the report.

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Seismic reflection profiles

11 Dezembro 2024, 15:00 • Pedro Antonio Gancedo Terrinha

1. Continuation of interpretation of the seismic profiles.

2. Selection of main topic for the final report

3. Selection of lines for the report.

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TECTONICS OF RIFT BASINS

11 Dezembro 2024, 11:00 • Pedro Antonio Gancedo Terrinha

1. Pure shear model (McKenzie model) illustrating stretching andthinning of the lithosphere.

2. Rheological composition of the lithosphere and different mechanical behaviour of mineral phases.

3. Lithosphere strength and development of weak zones in the crust and lithospheric mantle.

4. Tectonic detachments as a consequence of zones of weakness.

5. Underplating during rifting process: examples from the Red Sea and East Africa Rift (intra-continental rifting) and the Terceira Rift (Oceanic rifting)

6. Subsidence: tectonic subsidence as a result of crustal thinning; thermal subsidence as a result of thermal controlled density variation of the lithosphere.

7. Models of lithospheric stretching and thinning: pure versus simple shear and heterogenous shear. Consequences in overall basin geometry.

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