Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Late Paleoproterozoic mafic magmatism and the Kalahari craton during Columbia assembly

Djeutchou, Cedric ; de Kock, Michiel O. ; Wabo, Hervé ; Gaitán, Camilo E. ; Söderlund, Ulf LU and Gumsley, Ashley P. LU (2021) In Geology 49(11). p.1375-1380
Abstract

The 1.87–1.84 Ga Black Hills dike swarm of the Kalahari craton (South Africa) is coeval with several regional magmatic provinces used here to resolve the craton’s position during Columbia assembly. We report a new 1850 ± 4 Ma (U-Pb isotope dilution–thermal ionization mass spectrometry [ID-TIMS] on baddeleyite) crystallization age for one dike and new paleomagnetic data for 34 dikes of which 8 have precise U-Pb ages. Results are constrained by positive baked-contact and reversal tests, which combined with existing data produce a 1.87–1.84 Ga mean pole from 63 individual dikes. By integrating paleomagnetic and geochronological data sets, we calculate poles for three magmatic episodes and produce a magnetostratigraphic record. At 1.88 Ga,... (More)

The 1.87–1.84 Ga Black Hills dike swarm of the Kalahari craton (South Africa) is coeval with several regional magmatic provinces used here to resolve the craton’s position during Columbia assembly. We report a new 1850 ± 4 Ma (U-Pb isotope dilution–thermal ionization mass spectrometry [ID-TIMS] on baddeleyite) crystallization age for one dike and new paleomagnetic data for 34 dikes of which 8 have precise U-Pb ages. Results are constrained by positive baked-contact and reversal tests, which combined with existing data produce a 1.87–1.84 Ga mean pole from 63 individual dikes. By integrating paleomagnetic and geochronological data sets, we calculate poles for three magmatic episodes and produce a magnetostratigraphic record. At 1.88 Ga, the Kalahari craton is reconstructed next to the Superior craton so that their ca. 2.0 Ga poles align. As such, magmatism forms part of a radiating pattern with the coeval ca. 1.88 Ga Circum-Superior large igneous province

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Geology
volume
49
issue
11
pages
6 pages
publisher
Geological Society of America
external identifiers
  • scopus:85118656332
ISSN
0091-7613
DOI
10.1130/G48811.1
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2021 The Authors. Gold Open Access: This paper is published under the terms of the CC-BY license
id
54e323f8-79d1-4ac6-8003-bea26b74bf7c
date added to LUP
2021-11-22 12:14:57
date last changed
2022-04-27 05:54:44
@article{54e323f8-79d1-4ac6-8003-bea26b74bf7c,
  abstract     = {{<p>The 1.87–1.84 Ga Black Hills dike swarm of the Kalahari craton (South Africa) is coeval with several regional magmatic provinces used here to resolve the craton’s position during Columbia assembly. We report a new 1850 ± 4 Ma (U-Pb isotope dilution–thermal ionization mass spectrometry [ID-TIMS] on baddeleyite) crystallization age for one dike and new paleomagnetic data for 34 dikes of which 8 have precise U-Pb ages. Results are constrained by positive baked-contact and reversal tests, which combined with existing data produce a 1.87–1.84 Ga mean pole from 63 individual dikes. By integrating paleomagnetic and geochronological data sets, we calculate poles for three magmatic episodes and produce a magnetostratigraphic record. At 1.88 Ga, the Kalahari craton is reconstructed next to the Superior craton so that their ca. 2.0 Ga poles align. As such, magmatism forms part of a radiating pattern with the coeval ca. 1.88 Ga Circum-Superior large igneous province</p>}},
  author       = {{Djeutchou, Cedric and de Kock, Michiel O. and Wabo, Hervé and Gaitán, Camilo E. and Söderlund, Ulf and Gumsley, Ashley P.}},
  issn         = {{0091-7613}},
  language     = {{eng}},
  number       = {{11}},
  pages        = {{1375--1380}},
  publisher    = {{Geological Society of America}},
  series       = {{Geology}},
  title        = {{Late Paleoproterozoic mafic magmatism and the Kalahari craton during Columbia assembly}},
  url          = {{http://dx.doi.org/10.1130/G48811.1}},
  doi          = {{10.1130/G48811.1}},
  volume       = {{49}},
  year         = {{2021}},
}