The comparison of plagioclase factors with the other areas show that our results are meaningful and as a rule, the number of plagioclase nuclei is less than for amphibole in the dacitic
lavas without disequilibrium features dominate the N3 group, being accompanied by some mixed lavas with similar chemical composition.
Chlorite mottled schist, in which most orebodies are found, is believed to be the schistose equivalent of dacitic
lava flows generally occur as lava domes plugs and small satellite volcanoes inside and around Koh-e-Sultan Volcano.
As these clasts generally contain quartz, they can broadly be called dacitic
. Many of these clasts are also clearly phyllitic with sericitic groundmass.
The lithology of the area consists of greenschists, mica schists, quartzites, hornblende schists, amphibolites, garnet-amphibolites, serpentinites and porphyritic hypabyssal rocks with andesitic to dacitic
composition (Figure 1).
and Beni, E.: 2004, Morfological analysis of Nevado de Toluca volcano (Mexico): new insights into the structure and evolution of an andesitic to dacitic
volcanics and sandy conglomerates overlie the andesite / limestone sequence.
Felsic rocks range from dacitic
to rhyolitic in composition, and normally contain quartz and plagioclase phenocrysts; felsic rocks are commonly coarsely fragmental and are characterized by a considerable array of fragment types and sizes within and among units, as well as by variable amounts of juvenile volcanic material in the matrix.
Occurrence: In highly altered andesitic to dacitic
The most advanced of Gabriel's projects is Rosia Montana, 85 km north of Deva, where a programme of underground channel sampling and surface diamond drilling has confirmed gold mineralisation associated with multiple fractures and brecciated zones within two dacitic
intrusions, Cetate and Cirnic.