 | | Book | | 46°09′E) . . . . . . . . . . . . . . . 4.12.3 Pkhrutskii (38°51′N, 48°10′E) . . . . . . . . . . . . ....natural tetragonal leucite from the volcanic Lazium district (Italy). Their investigation at high pressure...these rocks are homogeneous containing 75–90 mol% orthoclase (Table 2.2). The tie lines between plagioclase...Macdonald et al. 1992). There is a tendency for the orthoclase content to increase with decreasing magnesia...Those from Shiprock (Montana) contain 64–72 % orthoclase molecule, whereas those from Barqueros lamproites |  | | Book | | lamprophyllite Rischorrite 4 Microcline, orthoclase, nepheline, aegirine, aegirine-augite, arfvedsonite...of the outer contact the pyroxenites contain orthoclase. In the central part of the complex dykes are...wherlites which grade upwards into orthoclase gabbros and orthoclase Kola and Karelia ... ~ U \ Tikshozero...Peralkaline syenites and melasyenites consist of orthoclase-perthite, aegirine-diopside and hastingsite with...sedimentary volcanic sequence of the Kontozero district, Kola Peninsula. Doklady Earth Science Sections |
|
