Title: Geochemical evidence for a mid-Cretaceous superplume
Abstract: Research Article| February 01, 1998 Geochemical evidence for a mid-Cretaceous superplume Yoshiyuki Tatsumi; Yoshiyuki Tatsumi 1Geothermal Research Institute, Kyoto University, Beppu 874, Japan Search for other works by this author on: GSW Google Scholar Hironao Shinjoe; Hironao Shinjoe 2School of Earth Sciences, IHS, Kyoto University, Kyoto 606-01, Japan Search for other works by this author on: GSW Google Scholar Hideo Ishizuka; Hideo Ishizuka 3Department of Geology, Kochi University, Kochi 780, Japan Search for other works by this author on: GSW Google Scholar William W. Sager; William W. Sager 4College of Geosciences, Texas A&M University, College Station, Texas 77843 Search for other works by this author on: GSW Google Scholar Adam Klaus Adam Klaus 4College of Geosciences, Texas A&M University, College Station, Texas 77843 Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (2): 151–154. https://doi.org/10.1130/0091-7613(1998)026<0151:GEFAMC>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Yoshiyuki Tatsumi, Hironao Shinjoe, Hideo Ishizuka, William W. Sager, Adam Klaus; Geochemical evidence for a mid-Cretaceous superplume. Geology 1998;; 26 (2): 151–154. doi: https://doi.org/10.1130/0091-7613(1998)026<0151:GEFAMC>2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Basalt lavas with a high Nb/Y ratio for a given Nb/Zr ratio occur in the Polynesian "superswell" region of the South Pacific, which probably formed by upwelling of a deep-mantle superplume. The distinctive geochemical characteristics of the Polynesian basalts may be attributed to melting of a mantle source that is more enriched in a basaltic (ancient mid-oceanic-ridge basalt) component. Basalts displaying such chemical signatures have been found on Shatsky Rise, the Ontong Java Plateau, and greenstones from subduction-zone complexes of Sakhalin Island. The occurrence of Polynesian-type basalts, together with an estimate of their ages, suggests that the South Pacific superplume was active as long ago as 90–150 Ma. The superplume activity preceded the onset of the superchron, supporting an idea that the superplume acted as a trigger for such a global event. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Publication Year: 1998
Publication Date: 1998-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 113
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