PETRocRAPHY oF THE LOE si MAN CARBONATITE

摘要: The Shilman complex comprises sill-form bodies emplaced along a fault zone in Palaeozoic to Precambrian metasedimentary rocks. The largest outcrop is 2.5 Km long with a width of 170 m in the central part. The rock-types of the complex include altered (meta) gabbros/dolerite, followed by amphibole-apatite-, biotite/phlogopite–, and dolonitic carbonatites, syenites and lamprophyric rocks, and Fe-rich hydrothermal veins, The syenitic rocks have locally been intruded and brecciated by light-coloured sovitic veins. It is suggested that the basic rocks might be related to the rest of the complex.The country rocks (slates, phyllites, nica scists, recrystallized limestone and guartzite) have been regionally metamorphosed up to the biotite zone of Barrovian, They display, locally, considerable fenitization with development of alkali pyroboles, phlogopite and alkali feldspars. The coplex is a westward extension of the over 200 …