Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL074717 |
Low-delta O-18 Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia | |
Wang, Wei1,2; Cawood, Peter A.3,4; Zhou, Mei-Fu2; Pandit, Manoj K.5; Xia, Xiao-Ping6; Zhao, Jun-Hong1 | |
2017-10-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:20 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; Australia; Scotland; India |
英文摘要 | The Malani igneous suite (MIS) in NW India represents one of the best preserved silicic large igneous provinces. Voluminous silicic lavas of the MIS erupted between similar to 780-750 Ma. Zircon grains from rhyolite and dacite lavas have oxygen isotopic compositions that include depleted (delta O-18 = 4.12 to -1.11 parts per thousand) and enriched (delta O-18 = 8.23-5.12 parts per thousand) signatures. The low-delta O-18 zircon grains have highly radiogenic Hf isotopic compositions (epsilon(Hf(t)) = +13.0 to +3.6), suggesting high-temperature bulk cannibalization of upper level juvenile mafic crust as an essential mechanism to produce the low-delta O-18 felsic magma. Xenocrystic zircon grains in dacites have high delta O-18 and low. Hf(t) values for magmas older than 800 Ma, reflecting a dramatic transition in tectono-thermal regime in NW India during 800-780 Ma. A synchronous transition also occurred in south China and Madagascar, suggesting a spatially linked geodynamic system. NW India and south China together with Madagascar and the Seychelles lay either along the periphery of Rodinia or outboards of the supercontinent with the age of convergent plate margin magmatism coinciding with breakup of the supercontinent. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416761600026 |
WOS关键词 | U-PB AGE ; ULTRAHIGH-PRESSURE ECLOGITE ; HF ISOTOPIC COMPOSITIONS ; HEISE VOLCANIC FIELD ; O ISOTOPES ; NEOPROTEROZOIC GRANITOIDS ; PERALUMINOUS GRANITOIDS ; CONTINENTAL-CRUST ; ZIRCON MEGACRYSTS ; CALDERA COMPLEXES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26673 |
专题 | 气候变化 |
作者单位 | 1.China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan, Hubei, Peoples R China; 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China; 3.Monash Univ, Sch Earth Atmosphere & Environm, Melbourne, Vic, Australia; 4.Univ St Andrews, Dept Earth Sci, St Andrews, Fife, Scotland; 5.Univ Rajasthan, Dept Geol, Jaipur, Rajasthan, India; 6.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Wei,Cawood, Peter A.,Zhou, Mei-Fu,et al. Low-delta O-18 Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(20). |
APA | Wang, Wei,Cawood, Peter A.,Zhou, Mei-Fu,Pandit, Manoj K.,Xia, Xiao-Ping,&Zhao, Jun-Hong.(2017).Low-delta O-18 Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia.GEOPHYSICAL RESEARCH LETTERS,44(20). |
MLA | Wang, Wei,et al."Low-delta O-18 Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia".GEOPHYSICAL RESEARCH LETTERS 44.20(2017). |
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