- Date: Wednesday, October 30, 2024
- Time: 11 am – 12 pm AEDT
- Location: Room 449 (Conference Room), Madsen (F09), School of Geosciences
- Zoom Link: https://uni-sydney.zoom.us/j/84172762752?from=addon
Mesozoic Volcanism and Their Tectonic Implications in Southeast Coastal China
Abstract
The Mesozoic tectonic evolution of Southeast Coastal China is characterised by widespread extensional basin and dome generation, voluminous magma intrusion/eruption and associated polymetallic mineralisation, all of which are of worldwide interest that have stimulated the attention of geologists for more than half a century. To reveal the spatio-temporal evolution of regional volcanisms and their tectonic setting, we subdivide Mesozoic–Cenozoic volcanic activities into four volcanic cycles (Ⅰ–Ⅳ) by integrating petrology, geochemistry and isotopic geochronology and summarise the temporal-spatial distribution, rock association, and tectonic setting of each cycle. The volcanic strata between each cycle are bounded by regional unconformity. The above four volcanic cycles correspond to 4 sequential stages of tectonic evolutions from the Early Jurassic post-orogeny, the Mid-Jurassic-Cretaceous subduction of the Paleo-Pacific Plate. Our study provides insights into the tectonic evolution pattern in response to the Late Mesozoic volcanic activity changes along the Southeast Coastal China, associated with the low-dipping → high-angle dipping → post-subduction retreat of the Paleo-Pacific Plate.
The Developing Chinese Mining Industry
Abstract
China is the world’s largest producer, consumer, and trader of mineral products. The vast scale of China’s manufacturing industry provides a continuous driving force for mining development. The Chinese government places great emphasis on high-quality development in the mining sector, focusing on deepening reforms in mineral resource management, encouraging mining investment, optimising the mining market, advancing green and low-carbon transitions, continually promoting the prosperous growth of the industry, and making important contributions to global green transitions and addressing climate change.