 | | Journal (article/letter/editorial) | | calcinitization of various rocks and of cancrinitization of nepheline syenites and ijoliteurtites are widely displayed...existence of the magmatic paragenesis calcite + nepheline + pyroxene (ijolite porphyries) has been put forward...the makeup of an alkaline-ultrabasic carbonatite complex; based on relative age they precede the appearance...following localities: Aldan province, Yakutia, USSR (Arbarastakh, Gornoye Lake); East-Sayan province, eastern...1965); in Europe in the Alno (Sweden) complex, in the Fen (Norway) complex, and in the Laacher See region (Brauns |  | | Journal (article/letter/editorial) | | 1087 INTERNATIONAL GEOLOGY REVIEW bonatite complex in Norway (fig. 2) and in an article by N. Z. Yevzikova...Yakutian (Aldan) province, in the Arbarastakh carbonatite complex (figs. 4, 5), c) in the Karelian-Kola...province (Polar Siberia), in the Gull carbonatite complex .(fig. 7). The widespread occurrence of carbonatites...some carbonatite complexes, for example the Arbarastakh complex (southern Yakutia), carbonatites with tabular...of calcite reach sizes of 25 x 25 x 3,cm. At Arbarastakh the tabular habit of the calcite is typical not |  | | Journal (article/letter/editorial) | | Analysis of the mineral associations (involving nepheline, cancrinite, vesuvianite, amphibole, plagioclase... preserved in isolated places, con sists of nepheline-albite and orthoclase-albite fenites and fenkized...of various alkalic rocks: tinguaite; alkalic, nepheline and can crinite syenites; and ijolite porphyry...the Arbarastakh complex. Detailed information on the proto type of this complex, the Arbarastakh pluton...Cambrian, Yudoma formation (Єjud). Upper Proterozoic complex, formations: 3) Kandyk (PR3kn); 4) Lakhanda (PR3lh); |  | | Journal (article/letter/editorial) | | the most im portant of which are the agpaitic nepheline syenites, ultramafic alkalic rocks with carbonatite...Aldan. In the eastern part of the shield, the Arbarastakh and Ingili plutons are known; they be long to...to the pre-Vendian apatite-bearing Arbarastakh complex of ultramafic alkalic rocks with carbonatites...of the Aldan complex and genetically independent Jurassic ultramafics of the Konder complex [13, 48]. ...represent the spatial coincidence of agpaitic nepheline syenite and ultramafic alkalic rock associations |  | | Book | | USSR L.N. Kogarko Vernadsky Institute, Moscow, Russia V.A. Konova Institute of Geology of Ore Deposits... Moscow, Russia M.P. Orlova All-Union Institute of Geology (VSEGEI), St Petersburg, Russia and A.R...Lengai natrocarbonatite volcano and the Ilimaussaq complex, but comparative studies on alkaline rocks have...amphiboles'. The rocks included are, therefore, the nepheline syenites (phonolites) and ijolites (nephelinites)...instance, containing normative but not modal nepheline, are excluded. However, sometimes these rocks |  | | Book | | COMPLEXES By P. J. WyLuir The Duke Island ultramafic complex, southeastern Alaska By T. N. IRVINE Introduction...rocks The ultramafic complex Pegmatitic rocks Contact effects of the ultramafic complex Further petrogenetic...monomineralic ultrabasic rocks: anorthite (43.2), nepheline (42.3), kalsilite (38.2), akermanite (44), gehlenite...used instead.” Doubtless this recommenda- oids nepheline, melilite, leucite, analcite, and rarely kalsilite...biotite, and ser- pentine. Phlogopite and nepheline are significant constituents in some rocks |
|
