In recent years, with the discovery of oil and gas in Carboniferous bauxite reservoir Ordos basin, formation distribution reservoirs have attracted attention explorers. Based on slightly equidistant core testing minerals porosity calibration logging curves, we established a identification method for study area fitted formula calculating diaspore content using data. By applying this large amount...

The fossil record of the subsurface biosphere is sparse. Results obtained on subsurface filamentous fabrics (SFF) from >225 paleosubsurface sites in volcanics, oxidized ores, and paleokarst of subrecent to Proterozoic age are presented. SFF are mineral encrustations on filamentous or fibrous substrates that formed in subsurface environments. SFF occur in association with low-temperature aqueous...

The hypothesis that caves in the Florida Peninsula are tied to Quaternary sea levels was proposed by hydrogeologists, without data, some 40 years ago. The hypothesis is a version of glacial control of cave levels, which is the logical combination of the water-table theory of speleogenesis and the concept that base level positions the water table. At the USA type example of glacial control of ca...

The Ordos Basin contains abundant coal resources in the Upper Paleozoic strata. They are shallowly buried or exposed periphery of basin, forming recoverable mines and coalbed methane resources. For deeply seams however, due to complex changes difficult mining, less attention was paid before. In recent years, with exploitation tight gas related source rocks, a large amount drilling seismic data ...