Fault-controlled mixed siliciclastic-carbonate-evaporite depositional systems exhibit distinct sensitivity to tectonic and eustatic controls that are expressed in the sedimentary architecture. In Upper Carboniferous Billefjorden Trough (Svalbard, Norway), up 2,000 m of a warm arid climate syn-rift basin fill comprises such systems, documented this study with traditional field techniques support...

water quality in each area, indicates the impact of geology, climate and anthropogenic pollutants. monitoring of water quality in most cases result in complex data which shows the perfect act of water resources, so they need appropriate method for analyzing. in this study hydro-chemical evaluation of hiv basin which located in west of hashtgerd have been done. to measure the concentration of ma...

sepiolite deposits have been recently discovered in northeastern iran. however, there is still little information about its physicochemical and mineralogical characteristics. therefore, the collapse of the sepiolite (with sizes of < 63 μm) structure induced by temperature elevation in an electric furnace at 350, 550, and 850 °c for 4 hours was studied using x-ray diffraction (xrd) in combinatio...

Abstract The swelling of clay-sulfate rocks is a well-known phenomenon often causing threats to the success various geotechnical projects, including tunneling, road and bridge construction, geothermal drilling. origin usually explained by physical due clay expansion combined with chemical associated transformation anhydrite (CaSO 4 ) into gypsum ∙2H 2 O). latter occurs through dissolution subse...

The research aims to study Sabkha mineralogy determine the mineral types, nature of precipitation, and patterns salt crystallization. Two Sabkhas in Abu Ghraib, west Baghdad, were studied. It was found that formed flat ponds from saturated solutions a semi-arid arid climate. Halite predominates, followed by anhydrite gypsum as evaporite minerals. As for minerals soil, it consisted feldspar, cal...

Introduction: Gypsum (CaSO 4 .2H 2 O) and bassanite (CaSO 4 .0.5H 2 O) were identified on Mars by OMEGA on Mars Express and CRISM on MRO [1, 2, 3]. An-hydrite (CaSO 4) is non-active in the spectral range of OMEGA and CRISM, but may also exist [4]. Ca-sulfate was inferred from compositional correlations revealed by APXS on Mars Exploration Rovers [5, 6, 7], but no definitive identification, as w...

[1] An active seafloor hydrothermal system subjects the background sediments of the Grimsey Graben (Tjörnes Fracture Zone) to alteration that produces dissolution of the primary volcaniclastic matrix and replacement/precipitation of sulfides, sulfates, oxides, oxyhydroxides, carbonates and phyllosilicates. Three types of hydrothermal alteration of the sediment are defined on the basis of the do...