clay minerals are considered the most important components of clastic reservoir rock evaluation studies. the shurijeh gas reservoir formation, represented by shaly sandstones of the late jurassic-early cretaceous age, is the main reservoir rock in the eastern kopet-dagh sedimentary basin, ne iran. in this study, x-ray diffraction (xrd), x-ray fluorescence (xrf), scanning electron microscopic (s...

The study of reservoir space development characteristics and the geochemical parameters Permian Longtan Formation in southeast Sichuan Basin at Well X1 was analyzed by using core observations, optical thin-section Ar-ion polishing, scanning electron microscopy, nitrogen adsorption tests. Major trace elements samples, V/Cr, U/T, enrichment coefficients EF (Mo) (U), chemical alteration indexes CI...

Observed enrichments of N (and the δ15N of this N) in volcanic glasses altered on Earth's modern and ancient seafloor are relevant in considerations of modern global N subduction fluxes and ancient life on Earth, and similarly altered glasses on Mars and other extraterrestrial bodies could serve as valuable tracers of biogeochemical processes. Palagonitized glasses and whole-rock samples of vol...

A 14-meter long pelagic clay core recovered at Marlin Rise (40°00.531′S, 154°2.601′W; 4775 m water depth) in the Southwest Pacific Basin contains a record of eolian dust deposited since the early Miocene. Downcore analysis of detrital minerals reveals a dominantly eolian signature with relatively constant proportions of quartz, feldspar and illite and trace amounts of chlorite, kaolinite and sm...

-Acidified suspensions of Al-saturated kaolinite, montmorillonite, mica, illite, and biotite in 10 -a M NaNO3 were potentiometrically titrated with 0.1 N NaOH and 0.1 N HNO3 in succession in a COz-free nitrogen atmosphere. The resulting curves were compared with those for AI(NO3)3 solutions of similar AI concentration in the supernatant solution and corrected for Al in the entrained solution in...

Recent studies of soil–landscape relationships in northeastern Patagonia identified fibrous-clay minerals in calcic and petrocalcic horizons developed on old fluvio-glacial plains called “Rodados Patagónicos” (RP). The objectives of this study were: i) to evaluate the occurrence of fibrous-clay minerals in the arid soil environment, and ii) to establish the relationship between the soil propert...