Geologic map of the Tarkwa gold district in Ghana showing significant folding and faulting associated with Eburnean metamorphism.[1]Geologic map of Ivory Coast, in which the "Eburnean, geosynclinal facies" is equivalent to the Birimian.[1]
Mountain building event in what is now West Africa
The Eburnean orogeny, or Eburnean cycle, was a series of tectonic, metamorphic and plutonic events in what is now West Africa during the Paleoproterozoic era about 2200–2000 million years ago.
During this period the Birimian domain in West Africa was established and structured.[2][3][4]
Eburnian faults are found in the Eglab shield to the north of the West African craton and in the Man Shield to the south of the craton.[5]
There is evidence of three major Eburnean magmatic events in the Eglab shield.
Between 2210 and 2180 Ma, a metamorphosed batholith was formed in the Lower Reguibat Complex (LRC).
Around 2090 Ma, a syntectonic trondhjemitic pluton intruded into the Archaean reelects of the Chegga series. Around 2070 Ma an asthenospheric upwelling released a large volume of post-orogenic magmas.[6]
Eburnian trends within the Eglab shield were repeatedly reactivated from the Neoproterozoic to the Mesozoic.[7]
^ abWright, J.B.; Hastings, D.A.; Jones, W.B.; Williams, H.R. (1985). Wright, J.B. (ed.). Geology and Mineral Resources of West Africa. London: George Allen & UNWIN. pp. 45–46. ISBN 9780045560011.
^Egal 2002, p. 58.
^Wright, J.B.; Hastings, D.A.; Jones, W.B.; Williams, H.R. (1985). Wright, J.B. (ed.). Geology and Mineral Resources of West Africa. London: George Allen & UNWIN. pp. 45–47. ISBN 9780045560011.
^Taylor, Ryan; Anderson, Eric (2018). Quartz-Pebble-Conglomerate Gold Deposits, Chapter P of Mineral Deposit Models for Resource Assessment, USGS Scientific Investigations Report 2010-5070-P(PDF). Reston: US Dept. of the Interior, USGS. p. 9.
The Eburneanorogeny, or Eburnean cycle, was a series of tectonic, metamorphic and plutonic events in what is now West Africa during the Paleoproterozoic...
Look up eburnean in Wiktionary, the free dictionary. Eburnean means made of, or relating to ivory. Other uses: Eburneanorogeny, a series of major tectonic...
Kibaran orogeny – Mountain building event in what is now Africa Eburneanorogeny – Mountain building event in what is now West Africa East African Orogeny –...
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to 2.9 Ga Pre-Leonean and Leonean Orogeny, the 2.9 to 2.8 Ga Liberian Orogeny, and the 2.15-1.8 Ga EburneanOrogeny. A definitive answer has strong implications...
(Francevillian Group Fossil); Wopmay orogeny along western margin of Canadian Shield. c. 2,090 Ma – EburneanOrogeny: Eglab Shield experiences syntectonic...
sedimentary rocks were folded during the Eburneanorogeny 2.2 to 2.0 billion years ago and intruded by granitoids. The orogeny also uplifted and eroded the rocks...
Mountains 2010 Sahel famine List of cities in Mali List of rivers of Mali Eburneanorogeny Kenieba inlier Bambouk Birimian "Mali country profile" (PDF). Library...
issued for a maximum period of 30 years. Mali portal Geology of Mali Eburneanorogeny Kenieba inlier Bambouk Viruet, Yadira Soto-. "2010 Minerals Yearbook:...
during the Liberian orogeny 2.75 billion years ago. More intense deformation followed 2.2 billion years ago during the Eburneanorogeny. Metazquartzites...
The Kibaran orogeny is a term that has been used for a series of orogenic events, in what is now Africa, that began in the Mesoproterozoic, around 1400...
formations occurred during the Eburneanorogeny, but a number of the remaining gold deposits formed before this orogeny during a period of oceanic arc-back-arc...
the Neoproterozoic Tuareg shield and a metacraton formed during the Eburneanorogeny. The basement crops out in deeply incised valleys, which in general...
outcrop in a few isolated locations near Bondoukou in the northwest. The Eburneanorogeny, 2.1 billion years ago metamorphosed many of the Paleoproterozoic rocks...
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were intruded by granite plutons in the Paleoproterozoic, during the Eburneanorogeny between 2 billion and 1.8 billion years ago. In southeastern Senegal...
building events are represented by the 2.1–2.0 Ga Trans-Amazonian and Eburnean orogens in South America and West Africa; the ~2.0 Ga Limpopo Belt in southern...
post-tectonic granites, dated at 2.05 billion years, lining up with the Eburneanorogeny. Geologists have found pebbles within microsyenites and microgranites...
lower basement is made of granites, gneisses and schists formed during the Eburnean age, about 2100–2000 Ma. The upper basement extends under part of the arc...
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