This is a poorly exposed granitic intrusion which may be alkaline but no details have been traced.
FLINN, D., LAGHA, S., ATHERTON, M.P. and CLIFF, R.A. 1991. The rock-forming minerals of the Jabal Arknu and Jabal al Awaynat alkaline ring complexes of SE Libya. In M.J. Salem and M.T. Busrewil (eds) The geology of Libya, 7: 2539-57. Elsevier, Amsterdam.