Coeval large-scale magmatism in the Kalahari and Laurentian cratons during Rodinia assembly.
We show that intraplate magmatism occurred 1106 to 1112 million years ago over an area of two million square kilometers within the Kalahari craton of southern Africa, during the same magnetic polarity chron as voluminous magmatism within the cratonic core of North America. These contemporaneous magmatic events occurred while the Rodinia supercontinent was being assembled and are inferred to be parts of a single large igneous province emplaced across the two cratons. Widespread intraplate magmatism during Rodinia assembly shows that mantle upwellings required to generate such provinces may occur independently of the supercontinent cycle.
Hanson
Richard E
RE
Department of Geology, Texas Christian University, Fort Worth, TX 76129, USA. r.hanson@tcu.edu
Crowley
James L
JL
Bowring
Samuel A
SA
Ramezani
Jahandar
J
Gose
Wulf A
WA
Dalziel
Ian W D
IW
Pancake
James A
JA
Seidel
Emily K
EK
Blenkinsop
Thomas G
TG
Mukwakwami
Joshua
J