Sibai core complex and its surrounding Pan-African nappe complex. The sequence of
metamorphic and structural events in the Sibai core complex and the enveloping Pan-
African nappe can be summarized as follows:(1) high temperature metamorphism
associated with partial melting of amphibolites and development of gneissic and migmatitic
rocks,(2) between 740 and 660Ma, oblique island arc accretion resulted in Pan-African …