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4He blanks do not affect the data (<1% of a typical sample).
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1842338359
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22Ne ratios are between 13.3 and 13.8 (30), consistent with solar Ne trapped in the mantle.
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1842335997
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36Ar = 135,000 to 171,000.
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42
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0000971753
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1842371176
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note
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Supported by the Natural Environment Research Council BRIDGE initiative (grant GST/02/1139). Thanks to T. Glenn for technical wizardry. The manuscript was considerably improved by the comments of two anonymous reviewers.
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