Provenance of injana formation in selected areas by studying heavy minerals

Abstract EN

Injana Formation is an extensively exposed in Iraq; four cross sections have been chosen from Zawita, Tikrit and Tar Al-Najaf areas..

Systematic sampling has been performed and 24 rock samples were collected to heavy minerals study .The megascopic description in precise details is also attained.

Heavy minerals investigation using polarized transmitted light microscopy and depending upon shapes of grains revealed there is intense effect of the Zagros provenance on the Injana sediments at Zawita and Tikrit sections in comparison with its effect on the Tar Al-Najaf sections.

This effect proved by the presence of basic rocks on the Injana sediments of Zawita area corroborated with pyroxene and amphibole content which are confirmed by heavy minerals study.

This work throws some light on the effects of acidic rocks of Arabian shield as the second provenance on the Injana sediments in the studied areas where it seems that the greater effect of this provenance is on Tar Al-Najaf sediments due to abundance of Zircon and Tourmaline in comparison with Zawita and Tikrit sections.