Isotopic signatures are used to distinguish Group I, Transition, and Group II kimberlites, and provide information on the origin of melts parental to the final intrusion. Kimberlitic rocks are often weathered and altered, making them potentially unsuitable for whole rock isotopic studies. We therefore have explored the alternative use of the isotopic signatures of resistant minerals in kimberli...

amygdaloidal, cavity- and fracture-filling zeolites in eocene volcanic rocks from the kuh-e-aradeh of southern kahrizak, in the northernmost part of central iran have been studied in some detail by optical, chemical analysis, sem, and xrd techniques. the zeolites identified, in order of their relative time of formation from early to late, are tetranatrolite, analcime, natrolite, mesolite, stilb...

Saline-sodic soils are susceptible to wind and water erosion when the dispersive effect of sodium overcomes inter-particle bonds. Rheological parameters viscoelasticity can help quantify attractive forces account for salinity in these soils. The main objective present study was investigate behavior saline-sodic Sirjan playa south-central Iran. Three representative pedons were excavated describe...

Reclaimed tidelands (RTLs) in the southwestern coastal areas of South Korea has been used for rice (Oryza sativa L.) cultivation due to high salinity soils. However, there is increased social pressure utilize RTLs upland crop decreased consumption. In this study, and sodicity 16 located were investigated explore suitability cultivation. Surface (0 - 20 cm) soil samples collected from 241 paddy ...

Soil salinization and sodification are common processes that particularly characterize drylands. These can be attributed either to natural conditions or anthropogenic activities. While causes include factors such as climate, lithology, topography, pedology, human mostly related agricultural land-use, specifically, irrigated agriculture. The objective of this study was thoroughly review topic, w...

" A, a saturated solution of sulphanilic acid in dilute (1 in 20) hydrochloric acid; B, a ?5 per cent, solution of sodic nitrite in distilled water. (Both of these solutions must be fresh?especially the latter, which cannot be depended on for more than a week at the longest. When they are mixed, of course, a solution of sulphanilic acid containing free nitrous acid is produced, which is the act...