the release rate of potassium (k) from micaceous minerals plays a significant role in supplying k to plants. the objective of this study was to determine the most appropriate kinetic equation to describe potassium release from micaceous minerals as influenced by organic acids. muscovite and phlogopite were made to react with 0, 500, 2000 and 4000 ?m solutions of oxalic, citric and malic acids f...

Experimental approaches attempt to determine the routes by which crustal carbonatite magmas can be derived from C02-bearing peridotite at high pressures. The intimate association of kimberlite and carbonatite on a small scale il· lustrates links in the processes. Carbonation of peridotite by C02 can cause the generation of near-solidus carbonatitic liquid from mantle peridotite at depths greate...

Aillikites are kimberlite-like rocks, important for understanding the composition and processes occurring in mantle. Melt inclusions represent a reliable source of information. The paper provides first results studies (Raman, EDS) on primary secondary melt olivine from Ilbokich uplift aillikites. is close to that parent It was significantly enriched CO 2 , H O, phosphorus titanium. Phlogopite, ...