Structural and lithological controls of gold–bearing veins associated with the Brasiliano–Pan African Orogeny: An example from the Buracão Area, Araí Group (Brasília Fold Belt, Brazil)

2016 ◽  
Vol 66 ◽  
pp. 180-195 ◽  
Author(s):  
Gustavo Luiz Campos Pires ◽  
Everton Marques Bongiolo ◽  
Christophe Renac ◽  
Débora Barros Nascimento ◽  
Maurício Prado
Keyword(s):  
Fold Belt ◽  
Pan African ◽  
Gold Bearing

scholarly journals Geochemistry of Umm Rus gold - quartz veins, Central Eastern Desert Egypt. A new contribution

2001 ◽  
Vol 34 (3) ◽  
pp. 1139
Author(s):  
O. A. KAMEL ◽  
M. M. EL MAHALLAWI ◽  
H. M. HELMY
Keyword(s):  
Hybrid Zone ◽  
Eastern Desert ◽  
Quartz Diorite ◽  
Low Grade ◽  
Gold Content ◽  
Strongly Correlated ◽  
Quartz Veins ◽  
Central Eastern Desert ◽  
Pan African ◽  
Gold Bearing

Gold-bearing quartz veins of the Umm Rus area occur at the south-eastern contact of a Precambrian granodiorite cupola within younger gabbros of 573-615 Ma belonging to the Pan African orogenic belt. The rocks are intruded within low-grade metasediments. At such contact, a hybrid zone is developed characterized by the occurrence of quartz diorite which grades into diorite and meta-ferrogabro. A limited number of mineralized quartz veins cut the granodiorite-gabbro complex. Different alteration zones are developed in the vicinity of the quartz veins. The quartz veins have two main trends; NS and N30 E, the latter one is usaually gold-bearing. The mineralized parts of the veins commonly consist of highly sheared and banded smoky quartz, and the gold content depends on the relation with the dykes. The element is strongly correlated with As and Ag, but moderately with Cu. Near to intermediate and basic dykes, the contents of Au, Ag and As are noticably increased

Outline of the geochronology and tectonic units of the basement complex of northeast Africa

1976 ◽  
Vol 350 (1660) ◽  
pp. 127-141 ◽  
Keyword(s):  
Regional Metamorphism ◽  
Central Africa ◽  
Geological Mapping ◽  
Fold Belt ◽  
Basement Complex ◽  
Southern Sudan ◽  
Pan African ◽  
Mozambique Belt ◽  
Unknown Area ◽  
Eastern Uganda

Results of new geological mapping with the help of air and satellite photo­graphy in Sudan together with information from adjacent territories has enabled a map to be drawn showing the dominant basement tectonic trends in a previously geologically unknown area. Over 100 age deter­minations, including 25 unpublished analyses, allow the recognition of Eburnian age events in Central Africa Republic and southeast Libya similar to the 1950 million year (Ma) old Ruwenzori Belt in Uganda and similar events in Zaire. A northeast trending fold belt is recognized in Central Africa, western Sudan and southeast Egypt in which 1000 Ma ages are found. The Pan African age Mozambique belt truncates older structures in eastern Uganda and southern Sudan but is covered by a greenschist volcanic assemblage along the Red Sea coast in which 550 ± 150 Ma old granites and regional metamorphism occur.

Petrogenesis of peraluminous magmas from the Akum-Bamenda Massif, Pan-African Fold Belt, Cameroon

2010 ◽  
Vol 53 (10) ◽  
pp. 1121-1149 ◽  
Author(s):  
Jean Paul Nzenti ◽  
Barbara Abaga ◽  
Cheo Emmanuel Suh ◽  
Charles Nzolang
Keyword(s):  
Fold Belt ◽  
Pan African

Paleoweathering, Provenance and tectonic setting of gold-bearing neoproterozoic rocks from the Atacora Structural Unit, Pan-African Dahomeyide belt, northwestern Bénin

2021 ◽  
pp. 104327
Author(s):  
Fatchéssin Bruno Adjo ◽  
Prosper M. Nude ◽  
Luc Adissin Glodji ◽  
Anthony Temidayo Bolarinwa ◽  
Bertrand Anagonou
Keyword(s):  
Structural Unit ◽  
Tectonic Setting ◽  
Pan African ◽  
Gold Bearing
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