Show simple item record

dc.contributor.authorDeng, Qi
dc.contributor.authorWang, Jian
dc.contributor.authorWang, Zheng-Jiang
dc.contributor.authorWang, Xuan-Ce
dc.contributor.authorQiu, Yan-Sheng
dc.contributor.authorYang, Qing-Xiong
dc.contributor.authorDu, Qiu-Ding
dc.contributor.authorCui, Xiao-Zhuang
dc.contributor.authorZhou, Xiao-Lin
dc.identifier.citationDeng, Qi and Wang, Jian and Wang, Zheng-Jiang and Wang, Xuan-Ce and Qiu, Yan-Sheng and Yang, Qing-Xiong and Du, Qiu-Ding and Cui, Xiao-Zhuang and Zhou, Xiao-Lin. 2013. Continental flood basalts of the Huashan Group, northern margin of the Yangtze block – implications for the breakup of Rodinia. International Geology Review. 55 (15): pp. 1865-1884.

It is generally accepted that Neoproterozoic extension and dispersal of the supercontinent Rodinia was associated with mantle plume or superplume activities. However, plume-generated contemporaneous continental flood basalts (CFBs) have rarely been identified. In this study, we present geochronological and geochemical evidence for the basalts from the Liufangzui Formation of the Huashan Group in the Dahongshan region of east-central China. A representative sample yields a SHRIMP U–Pb zircon age of 824 ± 9 Ma, interpreted as the crystallization age of the rocks. Geochemically, these basalts belong to the subalkaline tholeiite series and display slight enrichments in light rare earth elements (LREE) and varying degrees of deficiency of high field strength elements (HFSE) such as Nb, Ta, and Ti. This pattern is very similar to that of CFBs from the Bikou Group and Tiechuanshan Formation in the northwestern Yangtze block in China and Siberia in Russia. The basaltic magmas underwent partially-fractional crystallization during ascent, but were not intensely influenced by crustal contamination. The characteristic element ratios and negative Hf isotopic analyses (ϵHf(t) = −6.6–2.6) in zircons indicate that the parental magmas of the basalts might have been derived from an enriched lithospheric mantle rather than from the depleted mantle such as normal mid-ocean ridge basalts (N-MORBs).The geochemical signatures and regional geological characteristics show that these basalts were formed along intraplate continental rifts rather than in island arcs or ocean basins. Considering the coeval basic volcanic rocks in South China, we propose that these Huashan Group basalts represent the remnants of plume-generated CFBs and have close spatiotemporal ties with a coeval basic igneous province in Australia. Our results support the Neoproterozoic location of the South China block adjacent to southeastern Australia in the reconstruction model of the supercontinent Rodinia.

dc.publisherTaylor & Francis Inc.
dc.subjectHuashan Group
dc.subjectsupercontinent Rodinia
dc.subjectnorthern margin of the Yangtze block
dc.subjectmantle plume
dc.subjectcontinental flood basalt
dc.subjectSouth China
dc.titleContinental flood basalts of the Huashan Group, northern margin of the Yangtze block – implications for the breakup of Rodinia
dc.typeJournal Article
dcterms.source.titleInternational Geology Review
curtin.accessStatusFulltext not available

Files in this item


This item appears in the following Collection(s)

Show simple item record