Donnerstag, den 16. Mai 2024
10:00–12:00 Uhr, öffentliche Sitzung der Klasse für Naturwissenschaften und Technikwissenschaften der Leibniz-Sozietät der Wissenschaften zu Berlin
Die Sitzung findet als Zoom-Videokonferenz statt.
Der Zoom-Einladungslink wird rechtzeitig vor der Veranstaltung mitgeteilt.
Tao Wang (Beijing)
Continental assembly/growth and orogenic types: Big data of magmatic rocks
The continental crust distinguishes Earth from other planets and records its unique evolutionary history characterized by its assembly and growth during orogenesis. Many issues are still not known well, including what are the ways of assembly of complex continents, whether voluminous Phanerozoic growth occurs or not, what are the relationships of the assembly and crustal growth to orogeny, and how to quantitatively evaluate them.
The talk presents the results of recent research on these issues based on big data of igneous rocks. Five stages of the assembly of the complex Asian continent, including a roll-back, scissor-like closure of the Mongolian Okhotsk Ocean, were constructed through the spatial-temporal evolution of magmatic belts mainly based on geochronology datasets.
Nd-isotopic mapping of 8 typical Phanerozoic orogens characterizes their architecture and crustal growth. The results demonstrate that the proportions of juvenile crust decrease from typical accretionary (> 59%) to general accretionary (50% – 30%), to accretionary–collisional, and to collisional orogens and confirm voluminous (> 50%) Phanerozoic crustal growth. A new approach is proposed to quantitatively characterize orogen types and their evolution as well as their relationships with crustal growth through isotope mapping.
Professor Tao Wang is Senior Researcher of the Institute of Geology, CAGS (Chinese Academy of Geological Science), Director of the National Committee of Experts of Regional Geological Mapping, Deputy Director of Regional Geology and Mineralization Specialized Committee, China Geological Society and Director of the Beijing SHRIMP center (2018-2023). His major research interests are geological mapping, granitic origin, structural geology, tectonics, orogenic evolution, continental crust, deep Earth probes, and metallogeny. He published several sheets of 1:50000-scale Geological Maps. Tao Wang is the leader of IGCP-662 and co-leader of OnePetrology of DDE (Deep-time Digital Earth, the first IUGS-recognized Big Science Programme). He published about 290 papers in national and international journals and is listed in the top 2%-rank global scientists and top 1%-rank of global scientists in 2022.