India-Eurasia plate convergence and environmental consequences

该项目研究的是始新世早期印度-欧亚大陆从最早阶段到海洋沉积史结束的碰撞过程。印度-欧亚碰撞早期历史的地层时代、板块边缘碰撞前的范围和性质以及所涉及的陆块是喜马拉雅-青藏造山系演化和青藏高原随后隆升的重要前提条件。利用古地磁倾角结合生物地层学(沉积物)和放射性测量(火山岩)的精确测年，可以确定印度前北缘(大印度)的范围和欧亚大陆的南部位置。此外，研究新特提斯洋的缩小和闭合，将深刻地加深我们对新生代洋流系统的区域漂移、海温分布和全球气候变化的认识。我们将继续研究印度和亚洲碰撞时形成的喜马拉雅外围前陆盆地的沉积段，即藏南特提斯-喜马拉雅带(古鲁-冈巴-廷日位置)和拉萨地块火山岩的板块会聚和碰撞历史。

The project is addressed to the India-Eurasia collision from its earliest stage to the end of the marine sedimentary history during the Early Eocene. Stratigraphic timing of the early history of the India-Eurasia collision, the pre-collisional extent of the plate margins and their character as well as the continental masses involved are important preconditions in all models for the evolution of the Himalaya-Tibetan orogenic system and for the subsequent uplift of the Tibetan Plateau. Using palaeomagnetic inclinations combined with precise datings by biostratigraphy (sediments) and radiometry (volcanics) allow to determine the extent of India’s former northern margin (‘Greater India’) and the southern position of the Eurasian continent. Furthermore, studying the narrowing and finally the closure of the Neo- Tethyan Ocean profoundly enhances our understanding of regional shiftings of ocean current systems, distribution of SST and the global climate change during the Cenozoic. We will continue our studies on the history of plate convergence and collision in sedimentary sections of the Himalayan peripheral foreland basin which developed when India and Asia collided, named the Tethys-Himalaya Zone of southern Tibet (locations Guru – Gamba – Tingri) and volcanic rocks on the Lhasa Block.