Geologic genesis and significance research of global saline giants
Li Jianghai1,2, Ma Liya3, Wang Honghao1,2, Xu Li1,2
1. The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing 100871;
2. Institute of Oil and Gas, Peking University, Beijing 100871;
3. Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083
Evaporates widely developed from the Sinian to Neogene, especially in Sinian-Cambrian, Permian-Triassic, and Jurassic-Cretaceous. They always developed on large-scale in low latitude sedimentary basins with different types, having large area and sedimentary thickness, and they developed continuously in short time period. In this paper these evaporation basins were called saline giants. Based on the reconstruction of paleoplate and sedimentary lithofacies, the stratigraphic correlation and structure analysis of evaporation salt basins, the paper had discussed the development, distribution and geologic genesis and significance of global saline giants. The evolution of orogenic belt, the assemblage and breakup of supercontinent, the arid climate zone(between 30°N and 30°S), the changes of sea level and other factors had important influence on the development and distribution of saline giants. The saline giants developed in relatively closed plateaus and basins with recharge of subsurface seawater in arid environment. The saline giants generally distributed in the narrow rift belt inner continental plates, remnant oceanic basins in Tethyan orogenic belt, sea-land transitional zones, epicontinental sea and platform center of isolated plates.