TY - JOUR
T1 - 3.63 Ga grey gneisses reveal the Eoarchaean history of the Zimbabwe craton
AU - Hofmann, A.
AU - Kröner, A.
AU - Iaccheri, L. M.
AU - Wong, J.
AU - Geng, H.
AU - Xie, H.
N1 - Publisher Copyright:
© 2022 Geological Society of South Africa. All rights reserved.
PY - 2022/3
Y1 - 2022/3
N2 - Grey gneisses from the Tokwe and Rhodesdale terrains of the Zimbabwe craton have zircon ages of ~3.63, 3.52, and 3.34 Ga, validating the existence of Eo-to Palaeoarchaean crust. In-situ zircon Hf isotope compositions reveal the interplay between episodes of juvenile magma addition, crustal thickening and crustal differentiation. Starting from juvenile mafic crust (with chondritic composition) at ~3.9 Ga, the oldest nucleus of the Zimbabwe craton developed into a stable crustal block by ~3.35 Ga, following a tectonic and mantle evolution that is mirrored by other ancient terrains.
AB - Grey gneisses from the Tokwe and Rhodesdale terrains of the Zimbabwe craton have zircon ages of ~3.63, 3.52, and 3.34 Ga, validating the existence of Eo-to Palaeoarchaean crust. In-situ zircon Hf isotope compositions reveal the interplay between episodes of juvenile magma addition, crustal thickening and crustal differentiation. Starting from juvenile mafic crust (with chondritic composition) at ~3.9 Ga, the oldest nucleus of the Zimbabwe craton developed into a stable crustal block by ~3.35 Ga, following a tectonic and mantle evolution that is mirrored by other ancient terrains.
UR - http://www.scopus.com/inward/record.url?scp=85126890507&partnerID=8YFLogxK
U2 - 10.25131/sajg.125.0005
DO - 10.25131/sajg.125.0005
M3 - Article
AN - SCOPUS:85126890507
SN - 1012-0750
VL - 125
SP - 1
EP - 12
JO - South African Journal of Geology
JF - South African Journal of Geology
IS - 1
ER -