Explore the complexities of reconstructing palaeogeographies in tropical climates through a comprehensive 58-minute lecture focusing on Southeast Asia. Delve into the challenges posed by poor exposure and heavily weathered outcrops in regions like Indonesia and Malaysia. Learn how combining light minerals, heavy minerals, and detrital grain age analyses can fill gaps in geological understanding. Examine the tectonic assembly of SE Asia, including continental blocks, arc volcanism, and plate convergence. Investigate sedimentation history, mountainous rivers, and estimated sediment yields, with a specific example from the Salin Sub-basin in Myanmar. Study various databases and methodologies, including light and heavy mineral analyses, Gazzi-Dickinson models, U-Pb zircon dating, and foraminiferal studies. Discover how these diverse data sets contribute to reconstructing Eocene palaeogeographies and resolving complex tectonic histories in tropical regions.
Overview
Syllabus
Intro
Introduction to Southeast Asia
The Scale of SE Asia (Indonesia and Malaysia)
Tectonic Assembly of SE Asia
Continental Blocks
Arc Volcanism
Tectonic Plate Convergence
Issues with Reconstructions
History of Sedimentation
Mountainous Rivers
Estimated Sediment Yields
Example from the Salin Sub-basin, Myanmar
Map of the Cenozoic Basins
Data Locations SE Asia
Dating of Basement Rocks
Field Studies
Light Mineral Database
Gazzi-Dickinson Models
An Example from Borneo Borneo QmFLt
Volcanic Quartz
Heavy Mineral Database
Supported by Raman Spectroscopy
Heavy Minerals - Myanmar
Heavy Minerals for Palaeoenvironment
U-Pb Zircon Ages
Foraminifera Database
Using Forams to Date Arc Collision
Palaeogeographies - Eocene
Conclusions
Taught by
Seds Online
