Felsic crust development in the Kaapvaal Craton, South Africa: A reference sample collection to investigate a billion years of geological history
Felsic crust development in the Kaapvaal Craton, South Africa: A reference sample collection to investigate a billion years of geological history
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南非卡普瓦尔克拉通的长英质地壳发育:研究十亿年地质历史的参考样本集合
DOI:
10.1016/j.earscirev.2024.104680
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发表时间:
2024
影响因子:
12.1
通讯作者:
Moyen J
中科院分区:
文献类型:
--
作者:
Moyen J
The crust of the Kaapvaal craton accreted throughout the Archaean over nearly 1 billion years. It provides a unique example of the various geological processes that shape Earth's continental crust, and is illustrated by a reference collection of granitoids and mafic rocks (SWASA collection). This sample collection is fully characterised in term of age, major and trace elements, and documents the following multistage history of the craton. In the Barberton area, the initial stages of accretion (stage B·I, > 3.33 Ga and B.II, 3.28—3.21 Ga) correspond to the formation of a sodic (TTG) crust extracted from a near-chondritic reservoir. Stage B.III (ca. 3.1 Ga) corresponds to reworking of this crust, either through intracrustal melting, or via recycling of some material into the mantle and melting of this enriched mantle. Stage B.IV (2.85—2.7 Ga) corresponds to the emplacement of small, discrete plutons involving limited intracrustal reworking. The Northern Kaapvaal craton corresponds to a mobile belt flanking the Barberton cratonic core to the North. Stage NK·I (> 3.1 Ga) resembles stages B·I and B.II: formation of a TTG crust from a chondritic reservoir. In contrast, stage NK.II. (2.97–2.88 Ga) witnesses probable rifting of a cratonic fragment and formation of greenstone basins as well as a new generation of TTGs with both the mafic and felsic magmatism extracted from an isotopically depleted mantle (super-chondritic) reservoir. Intra-crustal reworking dominates stage NK.III (2.88–2.71 Ga), whereas sanukitoids and related granites, involving a mantle contaminated by recycled crustal material, are common during stage NK.IV (ca. 2.67 Ga).The SWASA collection are available as a reference collection to investigate the behavior of other systems of interest during a variety of crust evolution modes.
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DOI:
--
发表时间:
2019
期刊:
Regional Geology Reviews
影响因子:
--
作者:
O. Laurent;A. Zeh;G. Brandl;Adrien Vezinet;Allan H Wilson
通讯作者:
Allan H Wilson
影响因子:
3.5
作者:
K. Kreissig;T. Nägler;J. Kramers;D. D. Reenen;C. Smit
通讯作者:
C. Smit
影响因子:
3.8
作者:
A. Kröner;E. Hegner;J. Wendt;G. Byerly
通讯作者:
G. Byerly
影响因子:
3.8
作者:
T. Nägler;J. Kramers
通讯作者:
J. Kramers
影响因子:
3.9
作者:
Schneider;Hoffmann;Münker;Patyniak;Sprung;Roerdink;Garbe Schönberg;Kröner
通讯作者:
Kröner