A model showing how metallic bonds are formed - the first diagram shows the outer electrons in their atoms, and the second diagram shows that the electrons have become delocalised ...

Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Gansu 730000, Lanzhou, China Key Laboratory of Oil and Gas Resources Exploration and Evaluation in Gansu Province, ...

Previous studies have shown that organic carbon content can reach up to 10%. 2 Commercial oil accumulations were identified during the 1950s, as well as large evaporite reserves that remain unexplored ...