Abstract The paper considers the relationship between textural and structural features gross mineral chemical composition of minerals physical properties apatite-nepheline ores their processing. It is noted that change in involves primarily due to apatite depletion. An increase content nepheline pyroxene 35-55 % sharply increases ore strength up 47-104 MPa, which entails growth energy consumpti...

Introduction: Ca-Al-rich inclusions (CAIs) from Allende usually have secondary alteration phases such as anorthite, grossular, sodalite, and nepheline [1-3]. Although these phases are considered to have been formed by relatively low temperature reactions between CAIs and a surrounding nebular gas [1, 2], it is not well known that when such processes occurred. 36 Cl-36 S and

Abstract Alkaline-peralkaline igneous systems are promising sources of Rare Earth Elements (REE). Preservation bias has resulted in a gap the geological record for alkaline-peralkaline magmatic systems, with hypabyssal plumbing system linking magma chambers to extrusive volcanic rocks poorly represented. Large plutonic varieties these often proposed have fed (now eroded) volcanoes, and current ...

In this paper we classify the range of feldspathic igneous rocks using five geochemical variables: the FeO/(FeOþMgO) ratio or Fe-index, the modified alkali^lime index, the aluminum-saturation index, the alkalinity index, and the feldspathoid silica-saturation index.The Fe-index distinguishes between melts that have undergone extensive iron enrichment during differentiation from those that have ...

Titanium raw materials are widely used for the synthesis of various functional – sorbents radionuclides and rare earth elements, additives, filler pigments, etc. Since most titanium concentrates imported, in line with import substitution program, production titanite concentrate from apatite-nepheline ores Khibiny deposits is a promising trend supplying national industry materials. The article p...