Late Paleozoic Woniusi basaltic province from Sibumasu terrane: Implications for the breakup of eastern Gondwana's northern margin

CORC > 紫金山天文台 > 中国科学院紫金山天文台 > 行星科学与深空探测实验室

	Late Paleozoic Woniusi basaltic province from Sibumasu terrane: Implications for the breakup of eastern Gondwana's northern margin
	Liao, Shi-Yong 1,2; Wang, Dong-Bing 1; Tang, Yuan 1; Yin, Fu-Guang 1; Cao, Shu-Nan 3; Wang, Li-Quan 1; Wang, Bao-Di 1; Sun, Zhi-Ming 1
刊名	GEOLOGICAL SOCIETY OF AMERICA BULLETIN
	2015-09-01
卷号	127 期号:9-10 页码:1313-1330
英文摘要	The 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.
学科主题	天文和天体物理
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Geosciences, Multidisciplinary
研究领域[WOS]	Geology
关键词[WOS]	LARGE 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
收录类别	SCI
语种	英语
WOS记录号	WOS:000360559100009
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/14908]
专题	紫金山天文台_行星科学与深空探测实验室紫金山天文台_太阳活动的多波段观测研究团组
作者单位	1.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
推荐引用方式 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.