Garnet–kyanite–staurolite gneiss in the Pangong complex, Ladakh Himalaya, contains porphyroblastic euhedral garnets, blades of kyanite and resorbed staurolite surrounded by a fine-grained muscovite-biotite matrix associated with a leucogranite layer. Sillimanite is absent. The gneiss contains ...

A new occurrence of the rare corundum + quartz assemblage and magnesian staurolite has been found in a gedrite–garnet rock from the Central Zone of the Neoarchean Limpopo Belt in Zimbabwe. Poikiloblastic garnet in the sample contains numerous inclusions of corundum + quartz ± sillimanite, magn...

We determined the lithium isotope fractionation between synthetic Li-staurolite and aqueous fluids containing excess LiCl or LiOH at 3.5 GPa between 670 and 880 °C and between Li-mica and similar fluids at 2.0 GPa and 300 to 500 °C. In all experiments for the system Li-staurolite-fluid, 7Li wa...

In a mica schist unit of the Bossòst dome (Central Pyrenees, Spain) idioblastic interkinematic staurolite porphyroblasts with straight inclusion trails (Si) have rotated with respect to the main schistosity in the same sense by different amounts. Orientation data of 600 porphyroblasts were obta...

We report the first detailed petrological and pressure-temperature data from the pelitic schists and amphibolites of the Keffi area, north-central Nigeria, which is located on the eastern flank of the western Nigerian based, Great Nigerian Schist Belt. In one fresh exposure of the schist, stauro...

It is well accepted that the North China Craton formed by assembly of the Eastern and Western blocks along the Trans-North China Orogen, with cratonization in the Paleoproterozoic (∼1.85 Ma). However, there is controversy about the formation of the Eastern and Western blocks themselves, especia...

Monoclinic shape fabrics and inclusion trail geometries of porphyroblasts are regarded as reliable shear-sense indicators, provided that timing and sequence of growth can be established. In the southern Bossòst dome of the Central Pyrenees, staurolite and cordierite porphyroblasts in mica schis...

Excellent inclusion trails in a sample containing both staurolite and andalusite porphyroblasts are used to demonstrate techniques that allow the intimate relationships between deformation and porphyroblast growth to be recognized, described in detail and understood. This approach reveals three ...

The values of the heat capacities of the ferrocene, acetyl-, 1,1′-diacetyl-, benzoyl- and 1,1′-dibenzoylferrocene have been obtained by DSC in the temperature range 20–100°C and the regression line equations in this temperature interval have been calculated. The data obtained for ferrocene a...

The vapor pressures of benzoylferrocene and 1,1′-dibenzoylferrocene were measured by torsion-effusion technique. The following pressure-temperature equations were derived benzoylferrocene log P(kPa) = 10.75±0.22−(5314±82)/T 1,1′-dibenzoylferrocene log P(kPa) = 9.29±0.24−(4898±91 )/T Second...

The suitable titanium slag composition with high titanium content for electric furnace smelting of vanadium titanomagnetite was investigated through thermodynamics and related phase diagram analysis. According to the thermodynamic results, low-melting-point regions and MgTi2O5 primary phase area...

This paper concerns the heavy mineral composition of Jurassic, Cretaceous and Paleogene sedimentary successions in the Mandawa Basin. The nature of the heavy mineral assemblages in 38 samples was investigated to assess changes in sediment provenance through time. Further, the geochemistry of det...

Garnet single-grain analysis is an often used and well established tool in sedimentary provenance studies, especially when metamorphic source rocks are involved. So far, however, solely the geochemical composition of detrital garnets is considered to draw conclusions concerning probable source r...

Berthierine formation reduces the permeability of the glauconitic reservoir sandstones in the Siri oilfield (Danish North Sea), and is therefore a considerable production factor. A new hydrogeochemical batch model that is based on thermodynamics of chemical equilibrium was developed to identify ...

Berthierine was proven as one of the most important products of glauconite alteration in the Siri oilfield (Danish North Sea). However, there is an ongoing debate regarding the main product of glauconite dissolution: siderite, berthierine, or berthierine as a precursor of siderite and/or magnesi...

Berthierine as the only authigenic Fe-rich clay mineral occurs in an oil-bearing, glauconite-rich sandstone (Paleocene Heimdal Member of the Lista Formation, Danish North Sea). Based on the results of thin section, transmission and scanning electron microscopy, five different morphological types...

Water oxidation is a bottleneck of the hydrogen production through the water-splitting reaction. Herein, the promising role of fluoride on the water-oxidizing activity of a nanolayered Mn oxide under the electrochemical condition is reported. The experiments show the increase of the water-oxidiz...

Fluoride is one of the main phytotoxic pollutants released into the atmosphere. It can be released in the form of potassium fluoride by brick, ceramic, phosphate mineral and aluminum industries, causing damage to different plant species. Sapindus saponaria L. (Sapindaceae) is widely distributed ...

Fluoride is released in large amounts in the atmosphere by brick, ceramic, phosphate mineral and aluminum industries. It presents the highest phytotoxicity when compared to other air pollutants, damaging different tree species. Byrsonima basiloba Juss. (Malpighiaceae) is a fruit tree widely dist...

The present experimental investigation was carried out in order to explore the possible molecular interactions of potassium fluoride in aqueous lactose solution at different temperatures. Experimental values of density (ρ), viscosity (η) and ultrasonic velocities (U) were carried out on the li...