Publikationsdatum:
2021-03-29
Beschreibung:
The North Equatorial Panafrican belt
is constituted by orthogneissified metamorphic
and magmatic sets linked to
tectonometamorphic events of the neoproterozoic
orogeny. This belt whose
formations are situated in the North of
the congo craton is divided into three
distinct geodynamic domains: a southern
domain, a northern domain and a
central domain. The deformation and
metamorphism relationships are a function
of the different geodynamic domains
of the belt.
The central domains, to which belongs
the Banefo region, is affected by large
strike-slip faults among which is the central
cameroonian shear zone. This domain
is marked out by numerous syntectonic
granitoids. At Banefo (NE
Bafoussam, West Cameroon), those
massifs are mainly constituted by mylotinised
orthogneisses and granites of
various degrees. The country rock is
made up of gneiss and amphibolite. In
the Banefo massifs, the orthogneiss is
the least deformed petrographic unit.
It shows a heterogranular granoblastic
texture with a mineral assemblage
formed by quartz, K-feldspars, biotite,
etc., within the orthogneiss, remains of
magmatic fluidality can still be observed
marked by feldspar megacrystal. Field observations reveal a net progression
of the intensity of deformation of
orthogeisses to ultramylotinised granites
having an identical chemical composition
as the orthogneisses...
Beschreibung:
conference
Schlagwort(e):
551
;
VKA 200
;
VAE 140
;
VAE 850
;
VKB 270
;
VEP 500
;
Gefügekunde der Gesteine
;
Gesteinsdeformation {Strukturgeologie}
;
Festländische Lineamente {Geologie}
;
Produkte mechanischer Deformation {Petrologie}
;
Kamerun {Geologie}
;
Kamerun-Linie
;
Granitgneis
;
Mylonit
;
Deformation 〈Geologie〉
Sprache:
Deutsch
Materialart:
anthologyArticle
,
publishedVersion
Format:
application/pdf
Permalink
