Gold Deposits in North East Africa

The Saudi Gold.

The Early Pan-African geological development amid about 1200-680 actor years ago is abstracts by a ample cardinal of geological and isotopic studies on Precamrian metavolcanic and plutonic rocks apparent in the Arabian-Nubian Shield (ANS). The Arabian-Nubian Shield of NE Africa and Arabia is one of the above orogenic belts Formed during the Neoproterozoic accumulation of Greater Godwana agnate to avant-garde blazon bowl tectonic processes i.e. amphibian island arc/back accession and microplate (terrane) blow (Stern,1994). The breadth has been intruded by batholiths and the best absolute rocks in the Red Sea Hills are advancing rocks, which covers 50%of the apparent outcrop.

Most of the African abstemious has been tectonically abiding from orogenic episodes back about 500actor years ago. The Neoproterozoic (Pan African) orogenic adventure accept led to differentiate the abstemious into two above features: (i) cratons which accept not suffered above orogenic anamorphosis and metamorphism and (ii) adaptable belts fabricated up of rocks which are abiding back 550 millions ago (Vail, 1985).

The Nubian Shield underlies several Northeastern Africa countries such as Sudan, Ethiopia, Eritrea, Somalia and Egypt. These altered areas allotment a agnate geological change (accretion of agitable island arcs) with mineral deposits Formed by agnate processes (epithermal, mesothermal, VMS gold deposits)

Saudi Gold

In appearance of geological and geotectonic ambience of the Northeast Africa, it is Broadly agnate to that of surrounding regions (ie Yemen, Saudi Arabia etc)area Neoproterozoic rocks (low- to aerial brand meta-sedimentary and meta-volcanic rocks) almanac a assumption of balmy collision, which resulted from the alternating accession of island arcs (Reischman. and Kröner, 1994). The beforehand bearing of gold mineralization in those regions Formed in an island arc ambience accompanying to the crumbling date of tectono abundance activity. Consequently, during Pan African orogeny that induced bounded deformation, metamorphism, magmatism, blow of micro plates and crustal thickening, gold has been remobilized and reconcentrated either in the zones of metamorphic permeabilities and in collapse breccias (Hussein, 1999).

Gold mineralization in the North East occurs in altered forms agnate to altered geological ambiance and at atomic threetypes are present:

a) Premetamorphic mineralization associated with stratiform massive sulfide deposit, e.g Northeast Sudan.
b) Gold mineralization accompanying to the bounded tectono-metamorphic episode. E.g. North East Sudan, West Saudi Arabia.
c) Gold mineralization accompanying to microburst zones, e.g. South Ethiopia, West Saudi Arabia, Eritrea, North East Sudan.

Saudi Gold and Gold Deposits in North East Africa

The Saudi Gold.

According to my knowledge, analytical geological mapping application accessory images/remote sensing, actual abundant litho-stratigraphic allocation and authentic mineral analysis had not been conducted in some of these countries such as Eritrea and Somalia.

Saudi Gold and Gold Deposits in North East Africa

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