Writers : Moghtaderi.A & Kbakzad.A & Liaghat.S
Refference : Geosciences Scientific Quarterly Journal,No.:47-48,P.:78
Publishing Year : 1382

Abstract :
The Khajeh-e-Jainali chromite mines arc located in southwestern Iran, about 100 km north-west of Neyriz and 150 km north-east of the city of Shiraz. Field, microscopic and geochemical studies indicate that partial melting magmatic segregation and niagmatic miscibilty were responsible for the generation of the Khajeh-e-Jamali deposits. MORB and boninitic magmatic series are considered to have formed this Alpine type deposit.
Ru, os and Jr enrichment hi chronute and in host rock (dunite and harzburgfte) implies the deficiency or lack of sulphur phase and hence higher values of fo2 during the crystallization. Similarity in the correlation pattern of [Al, Ir] and [Cr, Ir] , positive correlation of Jr and Cr, lower value of fs2 in early stages of crystallization, association of varions phases, lack of preffered orientation of platin group metals (PGM) in chromite crystals and double - phase inclusions indicate a similarity in the deposition of Cr and PGM from a boninitic mell, simultaneous crystallization of chromite and IPGMs during the slow cooling or fractional crystallization and mixing of boninitic magma with a silica bearing liquid (trauzitional zone gabbro), lack of exsolution arid the association of PGMs with chromite composition. Wide v-shaped pattern of REE spider diagram is a confirmation of partial melting and the presence of boninitic series.
Subject List : Chromite