2013

The homogeniety of ophiolites associated ore deposits at Gala En Nahal - Ingessana suture, East of Sudan

Mohmed Ali NW., El Sammani Y., Abdel Rahman EM. Sulieman M., Ibrahim A., Musallum A.

Ministry of Minerals, Gras, P.O.BOX 410

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The oceanic crust produced industrial minerals are economically of very much importance. The oceanic crust is having very much similarities even in the elements discriminating diagrams of geological setting. The similarities include chemical signals in minerals parageneis that included in the study and represented by chromite, talc, asbestos, and magnesite. The Higaz suture has been taken as example that extends from the Saudi Arabia south south west to Sudan in Qala En Nahal and south to Ingessana Hills. All the above mentioned industrial minerals chemical correlations have been investigated and found bearing similar patterns and hence genetic model. The taken example that formed an integrated part in the Arabian Nubian Shield (ANS) is formed by the same mechanism of Wilson cycle at distinctive age that differ from the other sutures in the ANS. It is true that each of the oceanic terrane in every suture that form the totality of the accreted terranes is distinct in age from the other ones, however, their minerals chemistry are similar, that is attributed to multiple phase magmatic intrusion of ultramafic magma characterized each suture separately. Some sutures are having differences and ratios variation in the produced industrial minerals; there is much chromite in the Ingessana hills compared with Qala En Nahal while there is much talc and asbestos in Qala En Nahal and fewer of these minerals in the Ingessana hills. The variation is due to varied controlling conditions and factors that include critical thermodynamic equilibrium in each suture separately close with the critical reaction kinetics that influenced formation of each mineral phase and the corresponding plate tectonic regime.