Tungsten-182 heterogeneity in modern ocean island basalts
Mundl, A.; Touboul, M.; Jackson, M.G.; Day, J.M.D.; Kurz, M.D.; Helz, R.T.; Walker, R.J. (2017). Tungsten-182 heterogeneity in modern ocean island basalts. Science (Wash.) 356(6333): 66-69. https://dx.doi.org/10.1126/science.aal4179
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075; e-ISSN 1095-9203, more
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| Authors | | Top |
- Mundl, A.
- Touboul, M.
- Jackson, M.G.
- Day, J.M.D.
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- Kurz, M.D.
- Helz, R.T.
- Walker, R.J.
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| Abstract |
New tungsten isotope data for modern ocean island basalts (OIB) from Hawaii, Samoa, and Iceland reveal variable 182W/184W, ranging from that of the ambient upper mantle to ratios as much as 18 parts per million lower. The tungsten isotopic data negatively correlate with 3He/4He. These data indicate that each OIB system accesses domains within Earth that formed within the first 60 million years of solar system history. Combined isotopic and chemical characteristics projected for these ancient domains indicate that they contain metal and are repositories of noble gases. We suggest that the most likely source candidates are mega–ultralow-velocity zones, which lie beneath Hawaii, Samoa, and Iceland but not beneath hot spots whose OIB yield normal 182W and homogeneously low 3He/4He. |
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