The Yanqi Basin is a coal-bearing basin in Western China. In order to determine the hydrocarbon generation potential of Jurassic source rocks this area, organic matter composition coal-measure mudstone, carbonaceous mudstone and coal rocks, yields liquid gaseous hydrocarbons, comparison sources were studied by means hydrocarbon-generating thermal simulation experiments. results showed that micr...

COVER Eroded landscape of Yellowknife Bay, Gale crater on Mars. Sheepbed mudstone is seen in the foreground, ~4 meters distant from the Curiosity rover camera that took the photo; Gillespie sandstone is in the middle fi eld. The foothills of Mt. Sharp (upper left), ~20 kilometers distant, are Curiosity’s ultimate destination. Exploration of this region by the Curiosity rover offers evidence of ...

Mudstone rich in clay minerals exhibits an obvious water-induced weakening effect, and the mechanical properties of mudstone are significantly affected by groundwater. To investigate effect water on characteristics at microscale, a series uniaxial compression nanoindentation tests were conducted specimens different moisture contents. Microscale measurements upscaled to estimate corresponding ma...

There are normally pre-existing cracks that can be observed in the coal seam and immediate roof influences stability of rib spalling movement law overlying strata. In this study, comprehensive research methods (e.g., theory analysis, experimental tests numerical simulations) were adopted to reveal mechanical characteristics, acoustic emission behaviors failure modes a coal–mudstone combined bod...

The evaluation of hydraulic constants is generally one of the main components of reservoir engineering projects such as the development of radioactive waste disposal sites or the construction of underground CO2 storage. In the example presented here, flow pump experiments were conducted for the Horonobe mudstone to evaluate specific storage and hydraulic conductivity. The flow pump experiments ...

High-resolution transmission electron microscopy (HRTEM) measurements of the thickness of white mica crystallites were made on three pelite samples that represented a prograde transition from diagenetic mudstone though anchizonal slate to epizonal slate. Crystallite thickness, measured normal to (001), increases as grade increases, whereas the XRD measured 10 ~ peakprofile, the Kubler index, de...