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Understanding melt generation beneath the slow-spreading Kolbeinsey Ridge using U-238, Th-230, and Pa-231 excesses

Abstract:

To examine the petrogenesis and sources of basalts from the Kolbeinsey Ridge, one of the shallowest locations along the global ridge system, we present new measurements of Nd, Sr, Hf, and Pb isotopes and U-series disequilibria on 32 axial basalts. Young Kolbeinsey basalts (full-spreading rate=1.8cm/yr; 67°05'-70°26'N) display (230Th/238U)<1 and (230Th/238U)>1 with (230Th/238U) from 0.95 to 1.30 and have low U (11.3-65.6ppb) and Th (33.0ppb-2.40ppm) concentrations. Except for characteris...

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Publication status:
Published

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Publisher copy:
10.1016/j.gca.2011.08.020

Authors


Elkins, LJ More by this author
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Institution:
University of Oxford
Department:
Oxford, MPLS, Earth Sciences
Elliott, T More by this author
Mattielli, N More by this author
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Journal:
GEOCHIMICA ET COSMOCHIMICA ACTA
Volume:
75
Issue:
21
Pages:
6300-6329
Publication date:
2011-11-01
DOI:
ISSN:
0016-7037
URN:
uuid:0e7e3fe9-617b-406b-8fbd-4d5f1e9f0b67
Source identifiers:
186380
Local pid:
pubs:186380
Language:
English

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