Mindara

Mindara is an almost circular 3.5 km diameter intrusion of rings of syenite together with some trachytic breccia bodies that may be rafts or pipes. The syenite rings are generally steep and outward dipping, but contacts have not been recognised. There are a number of large foundered blocks of metasedimentary quartzites and siltstones that may be Nubian. The syenites may or may not contain quartz; aegirine-augite and aegirine are ubiquitous and may be rimmed by amphibole; 'barkevikite' may also be present. Fayalite is present in some syenites and biotite in others. An extensive swarm of trachyte dykes extends southwards from Mindara to Jibal Sha (No. 155-00-015) and are also widespread in the country west of these two intrusions (Vail et al., 1984, Geological map). They comprise aligned albite-oligoclase, a little quartz, altered sodic amphibole and biotite. Chemical data on these rocks will be found in Klemenic (1983).