From a fresh field investigation, it has been ascertained that the Late Palaeozoic Yu’erhong (Yuernhung) flora from Yu’erhong, Yumen, Gansu, northwestern Chin
Coal-bed methane is accumulated in micro-fissures and cracks in coal seams. The coal seam is the source terrace and reservoir bed of the coal-bed methane (Qian
The quartz in the Haigou gold deposit contains a great abundance of three-phase CO2-NaCl-H2O and two-phase CO2-rich inclusions, which are associated with two-ph