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Article: Low-δ18O Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia

TitleLow-δ18O Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia
Authors
KeywordsLow‐δ18O magma
Malani igneous suite
Localized lithospheric extension
NW India
South China
Rodinia
Issue Date2017
PublisherAmerican Geophysical Union. The Journal's web site is located at https://agupubs.onlinelibrary.wiley.com/journal/19448007
Citation
Geophysical Research Letters, 2017, v. 44 n. 20, p. 10298-10305 How to Cite?
AbstractThe 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 ~780–750 Ma. Zircon grains from rhyolite and dacite lavas have oxygen isotopic compositions that include depleted (δ18O = 4.12 to −1.11‰) and enriched (δ18O = 8.23–5.12‰) signatures. The low‐δ18O zircon grains have highly radiogenic Hf isotopic compositions (ƐHf(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‐δ18O felsic magma. Xenocrystic zircon grains in dacites have high δ18O and low ƐHf(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.
Persistent Identifierhttp://hdl.handle.net/10722/263246
ISSN
2020 Impact Factor: 4.72
2015 SCImago Journal Rankings: 3.323
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWang, W-
dc.contributor.authorCawood, PA-
dc.contributor.authorZhou, MF-
dc.contributor.authorPandit, MK-
dc.contributor.authorXia, XP-
dc.contributor.authorZhao, JH-
dc.date.accessioned2018-10-22T07:35:51Z-
dc.date.available2018-10-22T07:35:51Z-
dc.date.issued2017-
dc.identifier.citationGeophysical Research Letters, 2017, v. 44 n. 20, p. 10298-10305-
dc.identifier.issn0094-8276-
dc.identifier.urihttp://hdl.handle.net/10722/263246-
dc.description.abstractThe 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 ~780–750 Ma. Zircon grains from rhyolite and dacite lavas have oxygen isotopic compositions that include depleted (δ18O = 4.12 to −1.11‰) and enriched (δ18O = 8.23–5.12‰) signatures. The low‐δ18O zircon grains have highly radiogenic Hf isotopic compositions (ƐHf(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‐δ18O felsic magma. Xenocrystic zircon grains in dacites have high δ18O and low ƐHf(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.-
dc.languageeng-
dc.publisherAmerican Geophysical Union. The Journal's web site is located at https://agupubs.onlinelibrary.wiley.com/journal/19448007-
dc.relation.ispartofGeophysical Research Letters-
dc.rights©2017. American Geophysical Union. All Rights Reserved. This article is available at https://doi.org/10.1002/2017GL074717.-
dc.subjectLow‐δ18O magma-
dc.subjectMalani igneous suite-
dc.subjectLocalized lithospheric extension-
dc.subjectNW India-
dc.subjectSouth China-
dc.subjectRodinia-
dc.titleLow-δ18O Rhyolites From the Malani Igneous Suite: A Positive Test for South China and NW India Linkage in Rodinia-
dc.typeArticle-
dc.identifier.emailZhou, MF: mfzhou@hku.hk-
dc.identifier.authorityZhou, MF=rp00844-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1002/2017GL074717-
dc.identifier.scopuseid_2-s2.0-85034089529-
dc.identifier.hkuros295105-
dc.identifier.volume44-
dc.identifier.issue20-
dc.identifier.spage10298-
dc.identifier.epage10305-
dc.identifier.isiWOS:000416761600026-
dc.publisher.placeUnited States-
dc.identifier.issnl0094-8276-

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