广西大新铀矿床中铀与钼的关系

<正>1矿床特征概述大新铀矿床为中南地区典型的碳硅泥岩型铀矿床。该矿床处于华南准地台桂粤褶皱带某褶断地垒的北西端,区内出露地层有上寒武统和中、下泥盆统。那岭—俸屯背斜走向近东西,以寒武系为核部,泥盆系为两翼,两翼不对称,北翼地层倾向北,F2正断层切割了寒武系和泥盆系,构成地垒式构造。在断裂发育处,围岩蚀变较明显。大新铀矿床矿化岩石位于区域性正断层F2123     

全球气候变化研究与科学数据简

By illustrating the relationship between the climate system and the scientific data, a requirement of scientific data for the earth system research has been proposed to be paid more attention to climate change studies. The research progresses of global climate change in China for the recent 10 years have been reviewed and the important role of observation datasets and assimilated production in the global climate change has been pointed out. Furthermore, the meteorological data sharing situation     

北欧海深层水的研究进展简

As a connection region between North Atlantic and Arctic Oceans, the Nordic Sea plays a critical role in global climate system. In the Nordic Seas, surface water converts into intermediate water and deep water after cooling and other effects. These waters transport southward, and enter into North Atlantic as a form of overflow, therefore, they are the main source of the North Atlantic Deep Water(NADW), which play a key role in global ocean conveyor. The causes and processes of the deep water formation in the Nordic Seas are still uncertain. Based on a review of current and historical research results of the deep water in the Nordic Seas, the most important process for deep water formation convection is addressed. Factors and physical processes that may have impact on deep water formation are summarized. The transport of deep water in the Nordic Seas is summed up. Multi year variation of the deep water is described with the aim of giving some instructions and research directions to the readers.