Introduction: The Yaxcopoil-1 (Yax-1) borehole, 60 km SSW of the center of the Chicxulub crater, penetrated through 600 m of sediments below the impactites (from about 894.9 m to the lowermost drilling depth of 1510.9 m). These rocks which are most likely of Cretaceous age are deformed to various degree and consist of distinct lithologies, predominantly carbonates and sulfates (dolomite, limest...

The aim of this study is to investigate the feasibility underground storage gas in Um El-Radhuma formation /Ratawi field. This an aquifer consisting a high permeable dolomitebeds overlain by impermeable anhydrite bed Rus formation. Interactive petrophysics (IP), Petrel REand Eclipse 100 softwares were used conduct well log interpretation, build reservoir simulationmodel and predict behavior dur...

Abstract This study investigates the properties of self-leveling subfloor mortar mixtures with natural and calcined phosphogypsum waste in form calcium sulfate called anhydrite white ceramic, by replacing 50% mass Portland cement CP II Z-32. The effects using were evaluated fresh (initial fluidity, flow retention, regeneration time, setting heat hydration) hardened (compressive flexural tensile...

In the Hallstatt salt mine (Austria), polyhalite rocks occur in 0.5-1 m thick and several metre long tectonic lenses within the protocataclasite to protomylonite matrix of the Alpine Haselgebirge Fm.. Thin section analysis of Hallstatt polyhalites reveals various fabric types similar to metamorphic rocks of crust-forming minerals, e.g. quartz and feldspar. Polyhalite microfabrics from Hallstatt...

We have completed laboratory experiments and thermochemical equilibrium models to investigate secondary mineral formation under conditions akin to volcanic, hydrothermal acid-sulfate weathering systems. Our research used the basaltic mineralogy at Cerro Negro Volcano, Nicaragua, characterized by plagioclase, pyroxene, olivine, and volcanic glass. These individual minerals and whole-rock field s...

To reveal the basic characteristics and controlling factors of water quality change in the project Wenyu to Chaobai reclaimed water diversion, the water quality in the study area was monitored for one year at seven monitoring sites. Inverse geochemical models of the statistical groups were developed using PHREEQC to elucidate the hydrochemistry characteristics of reclaimed water and the factors...

Applying the pulsed field-gradient nuclear magnetic resonance (PFG-NMR) technique, timedependent self-diffusion coefficients, ) (∆ D 0 D , of water were measured in anhydrite cemented sandstones, in order to determine geometrical parameters of the pore space. As a first approach the Padé approximation, combining the short-time behaviour with the long-time asymptotic value of (where is the bulk ...

The mineralogical composition, microstructure, and reactivity of traditional gypsum, a multiphase product, is closely connected to its calcination temperature, but systematic studies which relate those features mechanical properties weathering resistance plasters are scarce. Here we examined the hydration behavior gypsum calcined between 100 1000 °C, contained varying amounts uncalcined bassani...