Join us for an exciting exploration of the geological history of eastern NE Asia as Dr. Jianping Zhou, a postdoctoral researcher from Ocean University of China currently visiting the EarthByte Group, takes us on a journey through time and tectonics. In this EarthByte Seminar Series event, we will delve deep into the fascinating world of Meso-Cenozoic basin-and-range systems and their role in shaping the landscape of eastern NE Asia..
More details below:
- Date: Wednesday, October 11th, 2023
- Time: 11:00 am – 12:00 pm
- Location: Geoscience Conference Room 449 o
- Zoom Link: https://uni-sydney.zoom.us/j/83446341852
Differential uplift triggered Meso-Cenozoic basin-and-range system: evidence from thermochronology in eastern NE Asia
Since the Mesozoic, eastern NE Asia has experienced multiple tectonic events, resulting in a complex structure and forming one of the world’s largest Meso-Cenozoic lacustrine basin systems. Presently, basin evolution models require further elucidation regarding the simultaneous generation of diverse rift basins and the potential impact stemming from the closure of the Mudanjiang Ocean, whose oceanic closure demarcated the boundary between the Songliao Basin and the eastern basins, raises questions about its influence on the development of the basin-and-range system. To address these questions, we augment detrital geochronology and low-temperature thermochronological data on the eastern NE Asia basin and ranges to investigate the shallow-deep coupling process of tectonic evolution since the Mesozoic.
In general, we note the existence of a proto-basin covering an area much larger than the previously contemplated “Pan-Sanjiang” Basin. Our study indicates the final closure of the Mudanjiang Ocean occurred at ca. 150-140 Ma. Since the Early Cretaceous, with changes in the subduction direction, two-stage flat slab subduction of the Paleo-Pacific plate and the consequent subduction of the Pacific plate co-dominated the basements’ differential uplift and the formation of the eastern NE Asia basin-and-range framework.