RESEARCH ON GLOBAL PALEO-PLATE RECONSTUCTION AND LITHOFACIES PALAEOGEOGRAPHY IN TRIASSIC

Global Triassic paleo-plate tectonics and lithofacies palaeogeographic play a significant role in the study of global source rocks and depositional environment. With the paleomagnetic software and based on the data from global basin analysis, Triassic paleo-plate maps, including global palaeogeographic, global lithofacies and hydrocarbon source rock maps, have been compiled under the consideration of various geological factors. During the Early Triassic, the continued gathering of the Pangea led to frequent volcanic activities. Glaciers were melting and back-arc basins developing globally. In the middle-late Triassic, as the results of magmatism of hot spots between the Greenland and Blatic, and the activity of large igneous provinces in Central Atlantic, the Pangea was breaking up, global sea level getting high and epicontinental seas developed in continental margins, that provided an environment favorable to the reproduction of hydrocarbon generating biota, which in turn promoted the formation of hydrocarbon source rocks. The Triassic source rocks account for only 1.2% of the Phanerozoic source rocks and the kerogen types of the Triassic source rocks are relatively uniform.