Results 11 to 20 of about 3,944 (185)

Assessing the Environmental Consequences of the Generation and Alteration of Mafic Volcaniclastic Deposits During Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 117-131., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Benjamin Black   +4 more
wiley  

+1 more source

The Cretaceous-Tertiary boundary Fiskeler at Stevns Klint, Denmark: the geochemistry of the major trace metals [PDF]

open access: yesJournal of the Serbian Chemical Society, 2001
Trace metals in the four discrete layers of the Cretaceous-Tertiary boundary (Fiskeler) at Stevns Klint (Denmark) are relatively well studied, yet much remains to be learned about them.
SALVADOR LOMONACO   +7 more
doaj   +3 more sources

Mechanical Activation of Smectite-Based Nanocomposites for Creation of Smart Fertilizers

open access: yesApplied Sciences, 2022
This research presents the mechanical creation of smart fertilizers from a mixture of smectite and urea in a 3:2 ratio by using the planetary milling technique.
Maxim Rudmin   +4 more
doaj   +1 more source

Characterization of a bentonite and its permanent aqueous suspension

open access: yesJournal of the Turkish Chemical Society, Section A: Chemistry, 2020
A bentonite sample taken from Reşadiye (Tokat/Turkey) deposite was mixed with distilled water. The formed permanent aqueous suspension was separated by decantation from the flocculated solid fraction.
Fatma Eda ÖZGÜVEN   +3 more
doaj   +1 more source

Exploration and characterization of local raw bentonite of a part of Garmiyan-Kurdistan/Iraq

open access: yesKuwait Journal of Science, 2023
Samples from Garmiyan located in Kurdistan region of Iraq were collected and investigated concerning their physical, chemical, and mineralogical properties.
Dler M.S. Shwan   +3 more
doaj   +1 more source

Uses of intercalation reactions for modification the structure of smectite mineral of bentonite (Maastrichtian and Danian) western desert / Iraq

open access: yesTikrit Journal of Pure Science, 2023
The smectite mineral of bentonite deposits within Digma (Maastrichtian) and Akashat (Danian) formations in the western desert of Iraq distinguished by hydrophilic properties, and the presence of Ca and sometimes Na in the interlayer space.
Ahid Younis Al-Mallah   +1 more
doaj   +1 more source

Charge Heterogeneity in Smectites

open access: yesClays and Clay Minerals, 1983
AbstractThe heterogeneity of sites for Ca→K exchange was examined by microcalorimetry in the <0.2-μm fractions of some selected smectites. Six groups of sites, ranging in exothermic exchange enthalpy (-d(ΔHx)/dx) from 5.7 to 10.9 kJ/eq were identified.
Talibudeen, O., Goulding, K. W. T.
openaire   +1 more source

Smectite-water

open access: yes, 2023
The molecular structure files used for the adsorption simulations, as well as the generated adsorption process files.
Jie Meng, Changdong Li
openaire   +1 more source

Diagenesis of the Sedimentary Fe–Ni Deposits of Euboea: Evidence Based on Phyllosilicate Mineralogy

open access: yesMaterials Proceedings, 2021
A set of samples with different textures from the sedimentary Fe–Ni deposits of Central Euboea, Greece, were studied with XRD and SEM-EDS to investigate the relationships between phyllosilicates present.
Spyros Cheliotis-Chatzidimitriou   +2 more
doaj   +1 more source

The Role of Randomly Mixed-Layered Chlorite/Smectite in the Transformation of Smectite to Chlorite [PDF]

open access: yesClays and Clay Minerals, 1997
AbstractVesicular and groundmass phyllosilicates in a hydrothermally altered basalt from the Point Sal ophiolite, California, have been studied using transmission electron microscopy (TEM). Pore-filling phyllosilicates are texturally characterized as having coherent, relatively thick and defect-free crystals of chlorite (14 Å) with occasional 24-Å ...
Bettison-Varga, Lori   +1 more
openaire   +4 more sources

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