Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Paleoproterozoic intraplate magmatism and basin development on the Kaapvaal Craton: Age, paleomagnetism and geochemistry of ∼1.93 to ∼1.87 Ga post-Waterberg dolerites
South African Journal of Geology, Volume 107, No. 1-2, Year 2004
Notification
URL copied to clipboard!
Description
We report U-Pb baddeleyite crystallization ages of ∼1927 and ∼1879 to ∼1872 Ma for dolerite sills intruding the Waterberg Group in Botswana and South Africa. These data increase the known extent of ∼1.9 Ga intraplate magmatism in southern Africa and place tighter age constraints on the Waterberg Group than previously available. In South Africa, ∼1.88 Ga dolerite intrudes upper Waterberg strata, constraining most, if not all, of the succession to have accumulated between ∼2.06 Ga (age of the underlying Bushveld Complex) and ∼1.88 Ga. This is consistent with derivation of much of the group from uplifted sources in reactivated segments of the Limpopo Belt. The dolerites are typical continental tholeiites, but their trace-element contents discriminate them from dolerite sills of the 1.1 Ga Umkondo Igneous Province, which occur in the same region. Paleomagnetic samples from dolerite intrusions in the Waterberg Group in South Africa (including one sill with a U-Pb baddeleyite age of ∼1872 Ma), and from dolerite sills and basalt flows in the Soutpansberg Group to the east-northeast, yield antipodal directions with a site mean pole at 15.6° north, 17.1°east, A95 = 8.9°. These data are interpreted to indicate that the ∼1879 to ∼1872 Ma dolerites were intruded into the Waterberg Group during voluminous magmatism associated with development of the Soutpansberg rift basin. Older, ∼1927 Ma dolerite in Botswana is similar in age and geochemistry to basalts in the craton-margin Olifantshoek Supergroup, suggesting that mafic magmatism in those two regions is genetically related. © 2004 Geological Society of South Africa.
Authors & Co-Authors
Hanson, Richard E.
Unknown Affiliation
Gose, Wulf Achim
Unknown Affiliation
Crowley, James L.
Unknown Affiliation
Ramezani, Jahandar A.
Unknown Affiliation
Bowring, Samuel A.
Unknown Affiliation
Bullen, Dean S.
Unknown Affiliation
Hall, R. Peter
Unknown Affiliation
Pancake, James A.
Unknown Affiliation
Mukwakwami, Joshua
Unknown Affiliation
Statistics
Citations: 146
Authors: 9
Affiliations: 7
Identifiers
Doi:
10.2113/107.1-2.233
Study Locations
Botswana
South Africa