3.63 Ga grey gneisses reveal the Eoarchaean history of the Zimbabwe craton

A. HOFMANN; A. KRÖNER; L. M. IACCHERI; J. WONG; H. GENG; H. XIE

doi:10.25131/sajg.125.0005

3.63 Ga grey gneisses reveal the Eoarchaean history of the Zimbabwe craton

A. HOFMANN, A. KRÖNER, L. M. IACCHERI, J. WONG, H. GENG, H. XIE

Research output: Journal Publications › Journal Article (refereed) › peer-review

5 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	South African Journal of Geology
Volume	125
Issue number	1
DOIs	https://doi.org/10.25131/sajg.125.0005
Publication status	Published - Mar 2022
Externally published	Yes

Bibliographical note

Funding Information:
AH acknowledges support by the Department of Geology of the University of Zimbabwe. On behalf of AK, we thank the DFG (grant KR590/9x), the DAAD, and the Hong Kong Research Council. We thank Elis Hoffmann and Oliver Nebel for reviews and Jeff Vervoort for comments on a previous version of the manuscript.

Publisher Copyright:
© 2022 Geological Society of South Africa. All rights reserved.

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title = "3.63 Ga grey gneisses reveal the Eoarchaean history of the Zimbabwe craton",

abstract = "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.",

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doi = "10.25131/sajg.125.0005",

language = "English",

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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 - Funding Information: AH acknowledges support by the Department of Geology of the University of Zimbabwe. On behalf of AK, we thank the DFG (grant KR590/9x), the DAAD, and the Hong Kong Research Council. We thank Elis Hoffmann and Oliver Nebel for reviews and Jeff Vervoort for comments on a previous version of the manuscript. 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.

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DO - 10.25131/sajg.125.0005

M3 - Journal Article (refereed)

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 -

3.63 Ga grey gneisses reveal the Eoarchaean history of the Zimbabwe craton

Abstract

Bibliographical note

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