Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Layered ultramafic complexes of the Barberton greenstone belt; age constraints and tectonic implications

A. Hofmann, C. R. Anhaeusser and X. H. Li
Layered ultramafic complexes of the Barberton greenstone belt; age constraints and tectonic implications
South African Journal of Geology (January 2021) Pre-Issue Publication

Abstract

Layered ultramafic-mafic complexes are a common component of the stratigraphically uppermost part of the Onverwacht Group of the Barberton greenstone belt. Associated with the Mendon Formation in the south and the Weltevreden Formation in the north, they represent an assemblage of thick differentiated flows and shallow synvolcanic intrusions ranging in composition from dunite to gabbro. U-Pb zircon dating of gabbro from the Sawmill and the Mundt's Concession ultramafic complexes from the northern part of the Barberton Greenstone Belt yielded ages of 3 258 + or - 8 Ma and 3 244 + or - 11 Ma, respectively. The ultramafic complexes are thus regarded to have been emplaced during a magmatic flare-up in the final stage of Weltevreden Formation volcanism, post-dating ultramafic magmatism in the southern part of the belt by several millions of years and thus suggesting diachronous evolution of the Onverwacht Group in the Barberton Greenstone Belt.


ISSN: 1012-0750
EISSN: 1996-8590
Serial Title: South African Journal of Geology
Serial Volume: Pre-Issue Publication
Title: Layered ultramafic complexes of the Barberton greenstone belt; age constraints and tectonic implications
Affiliation: University of Johannesburg, Department of Geology, Johannesburg, South Africa
Published: 20210127
Text Language: English
Publisher: Bureau for Scientific Publications, Pretoria, South Africa
References: 45
Accession Number: 2021-022992
Categories: Structural geologyGeochronologyIgneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch maps
S25°46'60" - S25°46'60", E31°03'00" - E31°03'00"
Secondary Affiliation: University of the Witwatersrand, ZAF, South AfricaChinese Academy of Sciences, CHN, China
Country of Publication: South Africa
Secondary Affiliation: GeoRef, Copyright 2021, American Geosciences Institute. Abstract, Copyright, Geological Society of South Africa. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2021
Close Modal

or Create an Account

Close Modal
Close Modal