Generation of early Archaean felsic greenstone volcanic rocks through crustal melting in the Kaapvaal, craton, southern Africa

doi:10.1016/j.epsl.2013.08.029

	Generation of early Archaean felsic greenstone volcanic rocks through crustal melting in the Kaapvaal, craton, southern Africa
	Kroener, Alfred 1,2; Hoffmann, J. Elis 3; Xie, Hangqiang 1; Wu, Fuyuan 4; Muenker, Carsten 4; Hegner, Ernst 5; Wong, Jean 6; Wan, Yusheng 1; Liu, Dunyi 1
刊名	EARTH AND PLANETARY SCIENCE LETTERS
	2013-11-01
卷号	381 页码:188-197
关键词	Barberton Greenstone Belt zircon age Nd-Hf isotopes greenstone evolution
ISSN号	0012-821X
DOI	10.1016/j.epsl.2013.08.029
文献子类	Article
英文摘要	High-potassium felsic volcanic rocks interlayered with basalt and komatiite in early Archaean greenstone sequences in the Barberton Greenstone Belt of South Africa and Swaziland, previously considered to be derived from melting of mafic precursors, are shown to be the result of melting of significantly older felsic crust. This is documented by a combination of SHRIMP zircon dating with Hf-in-zircon and whole-rock Lu-Hf and Sm-Nd isotopic data. Zircons from felsic rocks of the oldest Barberton unit, the 3.53 Ga Theespruit Formation, yielded predominantly negative epsilon(Hf(t))-values, whereas whole-rock epsilon(Hf(t))- and epsilon(Nd(t))-data are slightly negative to slightly positive. Similar results were obtained for ca. 3.45 Ga felsic rocks in the Hoeggenoog and Noisy Formations higher up in the greenstone stratigraphy. These data rule out derivation of the felsic units from melting of basaltic precursors and favor a crustal source, most likely of TTG composition. The isotopic data are not compatible with an entirely oceanic origin of the Barberton greenstone sequences and favor a pre-greenstone basement beneath the volcanic rocks. Crustal melting of Eo- to Paleoarchaean lower crust probably generated the felsic volcanic rocks and is likely to have been responsible for gradual stabilization of the Kaapvaal craton. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词	ANCIENT GNEISS COMPLEX ; S-TYPE GRANITES ; HF-ISOTOPE ; CONTINENTAL-CRUST ; PILBARA CRATON ; U-PB ; ZIRCON AGES ; EVOLUTION ; BELT ; ND
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000327367800018
资助机构	Beijing SHRIMP Centre, China ; Beijing SHRIMP Centre, China ; German Science Foundation (DFG)(KR 590/92-1 ; German Science Foundation (DFG)(KR 590/92-1 ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (RGC) ; German-Hong Kong Research Scheme (RGC) ; HO 4794/1-1) ; HO 4794/1-1) ; Beijing SHRIMP Centre, China ; Beijing SHRIMP Centre, China ; German Science Foundation (DFG)(KR 590/92-1 ; German Science Foundation (DFG)(KR 590/92-1 ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (RGC) ; German-Hong Kong Research Scheme (RGC) ; HO 4794/1-1) ; HO 4794/1-1) ; Beijing SHRIMP Centre, China ; Beijing SHRIMP Centre, China ; German Science Foundation (DFG)(KR 590/92-1 ; German Science Foundation (DFG)(KR 590/92-1 ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (RGC) ; German-Hong Kong Research Scheme (RGC) ; HO 4794/1-1) ; HO 4794/1-1) ; Beijing SHRIMP Centre, China ; Beijing SHRIMP Centre, China ; German Science Foundation (DFG)(KR 590/92-1 ; German Science Foundation (DFG)(KR 590/92-1 ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (DAAD) ; German-Hong Kong Research Scheme (RGC) ; German-Hong Kong Research Scheme (RGC) ; HO 4794/1-1) ; HO 4794/1-1)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/87246]
专题	中国科学院地质与地球物理研究所
通讯作者	Kroener, Alfred
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China 2.Johannes Gutenberg Univ Mainz, Inst Geowissensch, D-55099 Mainz, Germany 3.Univ Cologne, Inst Geol & Mineral, D-50674 Cologne, Germany 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 5.Univ Munich, Dept Geo & Umweltwissensch, D-80333 Munich, Germany 6.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Kroener, Alfred,Hoffmann, J. Elis,Xie, Hangqiang,et al. Generation of early Archaean felsic greenstone volcanic rocks through crustal melting in the Kaapvaal, craton, southern Africa[J]. EARTH AND PLANETARY SCIENCE LETTERS,2013,381:188-197.
APA	Kroener, Alfred.,Hoffmann, J. Elis.,Xie, Hangqiang.,Wu, Fuyuan.,Muenker, Carsten.,...&Liu, Dunyi.(2013).Generation of early Archaean felsic greenstone volcanic rocks through crustal melting in the Kaapvaal, craton, southern Africa.EARTH AND PLANETARY SCIENCE LETTERS,381,188-197.
MLA	Kroener, Alfred,et al."Generation of early Archaean felsic greenstone volcanic rocks through crustal melting in the Kaapvaal, craton, southern Africa".EARTH AND PLANETARY SCIENCE LETTERS 381(2013):188-197.