Mine geologists use the term “garnierite” for the green Ni-rich silicate minerals that occur in many Ni-laterite deposits. However, garnierite is not a mineral species recognized by the Commission on New Mineral and Mineral Names (CNMMN). Actually, garnierite is a general name for the NiMg hydrosilicates that usually occur as an intimate mixture that commonly includes two or more of the followi...

In case of nuclear accident, 90Sr and 134,137Cs are major radionuclides to account. previous works (Appl. Geochem. 87, 167; ibid 93, 167), a database ion-exchange parameters allowing the description Sr2+ Cs + adsorption on purified illite smectite was developed for multi-site (MSIE) model. this study, behaviours Cs+ were obtained with <150 ?m fractions French soil samples: cambisol fluvic, calc...

Loess may be integrated into slope deposits at different soil depths and influence related physical, chemical mineralogical properties. Therefore, tracking the border between deposited loess underlying materials estimating depth of penetration is a challenge. Five soils from Lower Silesia province in south-western Poland having types geologic substrate being covered by various thicknesses were ...

Many people in sub-Saharan Africa have to rely on meager water resources within mudstones for their only water supply. Although mudstones have been extensively researched for their low permeability behavior, little research has been undertaken to examine their ability to provide sustainable water supplies. To investigate the factors controlling the occurrence of usable ground water in mudstone ...

The East Asian summer monsoon controls the climatic regime of an extended region through temperature and precipitation changes. As the East Asian summer monsoon is primarily driven by the northern hemisphere summer insolation, such meteorological variables are expected to significantly change on the orbital timescale, influencing the composition of terrestrial sediments in terms of both mineral...

Chronic wasting disease (CWD) affects cervids and is the only known prion disease to affect free-ranging wildlife populations. CWD spread continues unabated, and exact mechanisms of its seemingly facile spread among deer and elk across landscapes in North America remain elusive. Here we confirm that naturally contaminated soil contains infectious CWD prions that can be transmitted to susceptibl...

Environmental analysis of offshore shale members of Upper Pennsylvanian Midcontinent cyclothems was undertaken using a combination of high-resolution X-radiography, petrography, and geochemical analyses. A hierarchical sampling strategy permitted investigation of (1) broad stratigraphic and geographic patterns of compositional variation through analysis of three shale members (Hushpuckney, Star...

The Eocene continental sequence investigated in this study belongs to the Salta Group; it was deposited an intracontinental rift, Basin (NW Argentina) that evolved from Lower Cretaceous middle Paleogene. Group contains Maíz Gordo and Lumbrera Fms, spans Paleocene-early Eocene, shows excellent exposures region of Valles Calchaquíes. This research is focused on facies Fm, which correspond early E...

The desirable physical and physiochemical properties of clay minerals have led them to play a substantial role in pharmaceutical formulations. Clay minerals like kaolin, smectite and palygorskite-sepiolite are among the world's most valuable industrial minerals and of considerable importance. The elemental features of clay minerals which caused them to be used in pharmaceutical formulations are...

Short-term experiments were conducted to investigate the effect of a commercial Fe and an iron-bearing clay mineral, ferruginuous smectite (SWa-1), on the degradation of pentachloroethane (PCA). After 3 h of contact time, SWa-1 catalyzed PCA dehydrochlorination to tetrachloroethene (PCE, 65% conversion), whereas commercial Fe promoted PCA stepwise dechlorination via dehydrochlorination (approxi...