0000000000854986

AUTHOR

R. E. Jacob

showing 2 related works from this author

Rb-Sr geochronology in favour of polymetamorphism in the Pan African Damara belt of Namibia (South West Africa)

1978

New Rb-Sr whole rock age data are reported from two metasedimentary sequences of the Damara Supergroup in the central Pan African Damara belt of Namibia (South West Africa).

Pan africanGeochronologyGeochemistryGeneral Earth and Planetary SciencesSedimentologyStructural geologyMineral resource classificationSupergroupGeologyWest africaGeologische Rundschau
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Areal extent and first U-Pb age of the Pre-Damaran Abbabis complex in the central Damara belt of South West Africa (Namibia)

1978

The Proterozoic Abbabis Complex emerges from beneath the metasediments of the Late Precambrian Damara Supergroup within mantled gneiss domes and anticlinoria over a wide area in the central granite zone of the Pan African Damara belt. U-Pb dating of composite-, size-, and non-magnetic fractions of metamict zircons from two samples of Abbabis granite-gneiss from the farm Abbabis yielded a concordia intercept age of 1925 −280 +330 Ma. It is speculated that the Abbabis basement rocks are continuous under the Damaran metasedimentary cover and may link up with the Franzfontein basement inlier of similar age. This conclusion supports the ensialic character of the northeastern branch of the Damara…

PrecambrianBasement (geology)ProterozoicGeochemistryGeneral Earth and Planetary SciencesSedimentologyStructural geologyGeomorphologyMineral resource classificationGeologyGneissZirconGeologische Rundschau
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