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Late Paleozoic Woniusi basaltic province from Sibumasu terrane: Implications for the breakup of eastern Gondwana's northern margin
Liao, Shi-Yong1,2; Wang, Dong-Bing1; Tang, Yuan1; Yin, Fu-Guang1; Cao, Shu-Nan3; Wang, Li-Quan1; Wang, Bao-Di1; Sun, Zhi-Ming1
2015-09-01
Source PublicationGEOLOGICAL SOCIETY OF AMERICA BULLETIN
Volume127Issue:9-10Pages:1313-1330
AbstractThe tectonic mechanism responsible for detachment of the Sibumasu terrane in the eastern Cimmerian continent from the Australian Gondwana margin remains poorly understood and debated. Our study on the late Paleozoic Woniusi basaltic province in the northern Sibumasu terrane may provide a new perspective on this problem, and further, on the rifting dynamics of eastern Gondwana's northern margin. In this study, we revealed that the Woniusi basaltic province is spread over an area of similar to 12,000 km(2) with a thickness of similar to 300-500 m for the eruptive phase. Direct zircon U-Pb dating of mafic dikes indicates that the Woniusi basaltic province was emplaced between the latest Carboniferous and late Early Permian (301 Ma to 282 Ma), synchronous with basaltic rocks from the Panjal Traps, Tethyan Himalaya (Bhote Kosi, Selong, Abor), Lhasa, and southern Qiangtang. Geochemically, the Woniusi basaltic rocks show subalkaline tholeiitic affinity and relatively homogeneous features of enriched light rare earth elements (LREEs) and large ion lithophile elements (LILEs) but depleted Nb and Ta patterns. They were most likely derived from an enriched subcontinental lithospheric mantle source and triggered by the mantle plume-induced rifting process. The Woniusi basaltic province, together with other coeval basaltic provinces from the Panjal Traps, Tethyan Hima-laya, Lhasa, and southern Qiangtang, belongs to a fragmented large igneous province that may have had an original area of over 2 x 10(6) km(2), which is comparable to that of the Ontong-Java, Deccan, or Siberian Traps. These Tethyan basaltic provinces share a common mantle plume centered in northern Greater India. It was this mantle plume that may have triggered the initial rifting of the eastern Cimmerian terranes (e.g., Sibumasu, southern Qiangtang) from both the northern Indian and Australian Gondwana margins, as well as the opening of Meso-Tethys Ocean. This study, moreover, sheds light on the paleopositions of the Lhasa and Tengchong terranes before their breakups.
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1130/B31210.1
WOS KeywordLARGE IGNEOUS PROVINCES ; MESOZOIC PALAEOTETHYAN EVOLUTION ; CONTINENTAL FLOOD BASALTS ; HF ISOTOPIC COMPOSITIONS ; VOLCANIC RIFTED MARGINS ; PLATE TECTONIC MODEL ; U-PB GEOCHRONOLOGY ; SW CHINA ; SOUTHWEST CHINA ; WESTERN YUNNAN
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000360559100009
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14908
Collection行星科学与深空探测实验室
太阳活动的多波段观测研究团组
Affiliation1.Chengdu Inst Geol & Mineral Resources, Chengdu 610082, Peoples R China
2.Chinese Acad Sci, Key Lab Planetary Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
3.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Liao, Shi-Yong,Wang, Dong-Bing,Tang, Yuan,et al. Late Paleozoic Woniusi basaltic province from Sibumasu terrane: Implications for the breakup of eastern Gondwana's northern margin[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2015,127(9-10):1313-1330.
APA Liao, Shi-Yong.,Wang, Dong-Bing.,Tang, Yuan.,Yin, Fu-Guang.,Cao, Shu-Nan.,...&Sun, Zhi-Ming.(2015).Late Paleozoic Woniusi basaltic province from Sibumasu terrane: Implications for the breakup of eastern Gondwana's northern margin.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,127(9-10),1313-1330.
MLA Liao, Shi-Yong,et al."Late Paleozoic Woniusi basaltic province from Sibumasu terrane: Implications for the breakup of eastern Gondwana's northern margin".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 127.9-10(2015):1313-1330.
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