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Paleoproterozoic ophiolite remnants in the northern margin of the North China Craton: Evidence from the Chicheng peridotite massif
Liu, Hui1,2; Zhang, Hong-Fu2,3
2019-11-01
Source PublicationLITHOS
ISSN0024-4937
Volume344Pages:311-323
AbstractPrecambrian ophiolites provide important clues to the onset of modern-style plate tectonics. Peridotite massifs exposed in Chicheng area in the northern margin of the North China Craton occur as discrete tectonic lenses or boudins within Archean-Paleoproterozoic meta-volcanic and meta-sedimentary rocks of the Hongqiyingzi Group, along with retrograde eclogites. These serpentinized peridotites are composed dominantly of harzburgites and dunites, with minor ultramafic cumulates. Here we report the petrography, whole-rock chemical compositions, and mineral chemistry of the Chicheng peridotites with a view to evaluate their genesis and tectonic significance. The high Mg-number (91.2-93.5), low Al2O3 and CaO contents of harzburgites and dunites, as well as the high Fo values of olivine and Cr-number of spinel from these rocks suggest that the rocks represent highly refractory residues of partial melting. The ultramafic cumulates on the top of the peridotite massif might represent the early ultramafic cumulates from partial melt, as indicated by their relatively low Mg-number (87.0 and 91.8), and slightly higher Al2O3 and CaO contents. We infer that the Chicheng peridotites represent fragments of ancient sub-oceanic lithospheric mantle. The peridotites and the coexisting retrograded eclogites together with the gneisses in Chicheng might form part of a tectonically dismembered Paleoproterozoic ophiolite. The ophiolite was emplaced along the continental margin and subducted to the depth of eclogites facies during the formation of the Trans-North China Orogen. The metasomatized orthopyroxene in the Chicheng peridotites and flat REE pattern of whole rocks indicate melt/fuild metasomatism on residual peridotites during the post-melting stage. Amphiboles mostly show tremolite composition and were formed by retrograde metamorphism as displayed by their low Na, K, Ti and high Si contents. The ubiquitous existence of metamorphic amphiboles in Chicheng peridotites suggests that the ophiolite was subjected to amphibole-fades metamorphism before their exhumation in the Phanerozoic. The recognition of the ophiolite and its evolution history suggest that modern-style plate tectonics had begun at least in the Paleoproterozoic. (C) 2019 Elsevier B.V. All rights reserved.
KeywordNorthern North China Craton Hongqiyingzi Group Peridotite massif Metasomatic melt/fluid impregnation Ophiolite remnants
DOI10.1016/j.lithos.2019.06.025
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China
WOS KeywordMID-ATLANTIC RIDGE ; AL ORTHO-PYROXENE ; UPPER-MANTLE ; ABYSSAL PERIDOTITES ; LITHOSPHERIC MANTLE ; OMAN OPHIOLITE ; SUBDUCTION INITIATION ; TECTONIC EVOLUTION ; MELT EXTRACTION ; OS ISOTOPE
Language英语
Funding ProjectNatural Science Foundation of China[41688103]
Funding OrganizationNatural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000483419900020
PublisherELSEVIER
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/93594
Collection岩石圈演化国家重点实验室
Corresponding AuthorZhang, Hong-Fu
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Shaanxi, Peoples R China
First Author AffilicationState Key Laboratory of Lithospheric Evolution
Recommended Citation
GB/T 7714
Liu, Hui,Zhang, Hong-Fu. Paleoproterozoic ophiolite remnants in the northern margin of the North China Craton: Evidence from the Chicheng peridotite massif[J]. LITHOS,2019,344:311-323.
APA Liu, Hui,&Zhang, Hong-Fu.(2019).Paleoproterozoic ophiolite remnants in the northern margin of the North China Craton: Evidence from the Chicheng peridotite massif.LITHOS,344,311-323.
MLA Liu, Hui,et al."Paleoproterozoic ophiolite remnants in the northern margin of the North China Craton: Evidence from the Chicheng peridotite massif".LITHOS 344(2019):311-323.
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