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Petrogenesis and tectonic implications of Late Mesoproterozoic A(1)- and A(2)-type felsic lavas from the Huili Group, southwestern Yangtze Block
Wang, Dong-Bing1; Wang, Bao-Di1; Yin, Fu-Guang1; Sun, Zhi-Ming1; Liao, Shi-Yong2; Tang, Yuan1; Luo, Liang1; Liu, Zheng3
2019-08-01
Source PublicationGEOLOGICAL MAGAZINE
ISSN0016-7568
Volume156Issue:8Pages:1425-1439
Corresponding AuthorWang, Dong-Bing(wangdb06@163.com)
AbstractThis paper presents new LA-ICP-MS zircon U-Pb chronology, whole-rock geochemical and zircon Hf isotopic data for the felsic lavas of the Huili Group from the southwestern Yangtze Block. LA-ICP-MS zircon U-Pb dating shows that these rocks were emplaced in Late Mesoproterozoic time (similar to 1028 to 1019 Ma). Relative to typical I-type and S-type granitoids, all the samples are characterized by low Sr and Eu, and high high-field-strength element contents, high TFeO/MgO, enriched rare earth element compositions and negative Eu anomalies, indicating that they share the geochemical signatures of A-type granitoid. They can be further divided into two groups: Group I and Group II. Group I are A(1)-type felsic rocks and were produced by fractional crystallization of alkaline basaltic magmas. The Group II felsic lavas belong to the A(2)-type and were derived by partial melting of a crustal source with mixing of mantle-derived magmas. Both Group I and Group II felsic lavas may erupt in a continental back-arc setting. The coexistence of A(1)- and A(2)-type rocks in the southwestern Yangtze Block suggests that they can occur in the same tectonic setting.
KeywordA-type back-arc setting Late Mesoproterozoic Western Yangtze Block
DOI10.1017/S0016756818000882
WOS KeywordA-TYPE GRANITES ; U-PB AGES ; SOUTH CHINA ; SW CHINA ; GEOCHEMICAL CHARACTERISTICS ; FUCHUAN OPHIOLITE ; ALKALINE BASALTS ; JIANGNAN OROGEN ; VOLCANIC-ROCKS ; HF ISOTOPES
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000475939700009
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/27074
Collection中国科学院紫金山天文台
Corresponding AuthorWang, Dong-Bing
Affiliation1.Chinese Geol Survey, Chengdu Ctr, Chengdu 610081, Sichuan, Peoples R China
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Planetary Sci, Nanjing 210008, Jiangsu, Peoples R China
3.Yunnan Univ, Sch Resource Environm & Earth Sci, Kunming 650091, Yunnan, Peoples R China
Recommended Citation
GB/T 7714
Wang, Dong-Bing,Wang, Bao-Di,Yin, Fu-Guang,et al. Petrogenesis and tectonic implications of Late Mesoproterozoic A(1)- and A(2)-type felsic lavas from the Huili Group, southwestern Yangtze Block[J]. GEOLOGICAL MAGAZINE,2019,156(8):1425-1439.
APA Wang, Dong-Bing.,Wang, Bao-Di.,Yin, Fu-Guang.,Sun, Zhi-Ming.,Liao, Shi-Yong.,...&Liu, Zheng.(2019).Petrogenesis and tectonic implications of Late Mesoproterozoic A(1)- and A(2)-type felsic lavas from the Huili Group, southwestern Yangtze Block.GEOLOGICAL MAGAZINE,156(8),1425-1439.
MLA Wang, Dong-Bing,et al."Petrogenesis and tectonic implications of Late Mesoproterozoic A(1)- and A(2)-type felsic lavas from the Huili Group, southwestern Yangtze Block".GEOLOGICAL MAGAZINE 156.8(2019):1425-1439.
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