March 2014

Mafic and ultramafic rocks in parts of the Bhavani complex, Tamil Nadu, Southern India: Geochemistry constraints

Present paper deals with the petrogenesis of gabbros and pyroxenites of Bhavani complex, Tamil Nadu, Southern India. Studied gabbros are mainly composed of pyroxenes with minor plagioclase (An10-30) and amphibole minerals. Pyroxenites are composed of coarse-grained clinopyroxenes, orthopyroxenes and medium-grained hornblende minerals.  Geochemically, in the total alkali vs. SiO2 diagram studied samples are...

Author(s): Ali Mohammed Dar, Akhtar R. Mir, K. Anbarasu, M. Satyanarayanan, V. Balaram, D. V. Subba Rao and S. N. Charan

March 2014

Recent uranium mobilization and radioactivity of metamorphosed sandstones at Sikait area, South Eastern desert of Egypt

The metamorphosed sandstones exposures occur in two locations in Wadi Sikait. The exposed rocks in this area are ophiolitic mélange, metamorphosed sandstones, porphrytic granites invaded by post-granite dykes (lamprophyres) and quartz-fluorite veins. The uranium contents measured radiometrically range from 3 to 41.97 ppm, with an average of 12 ppm, while the chemically measured are in the range from 20 to 100 ppm...

Author(s):    Soliman A. Abu Elatta, S. F. Hassan, A. H. El-Farrash, M. G. El-Feky and M. Refaat