100 / 1971-01-01 00:00:00

Petrography And Mineral Chemistry Of Volcanic Rocks In The South Of Bardsir (dahaj-sarduieh, Iran):

clinopyroxen,seive texture,mineral chemistry,volcanic-Arc,Urumieh-Dokhtar

Shirinak volcanic rocks are located at south-east Bardsir (Kerman province). Geologically, the area is a part of Urumieh-Dokhtar volcanic belt, which is known as Dahaj–Sarduieh belt in Kerman Province. Petrographically, the studied lavas contain plagioclase, clinopyroxene and olivine phenocrysts which set in a microlithic and fine–grained matrix. On the basis of petrographic observations and electron microprobe analyses data of plagioclases are labradorite-bitonite that when they formed, suffered thermal and compositional mixing and mostly show sieve texture. On the other hand, The composition of the clinopyroxene is augite and their physical and chemical conditions evaluated that formation in different depths during their ascending and component at variable oxigenous condition with H2O range 10%, respectively. The Cpx thermometry shows the temperature of 550-1110ºC. Petrogenesis studieson the basis clinopyroxen chemistry are explained by orientation of basic volcanic rock in tholeiitic to calc-alcalin series that obedient to volcanic arcs.