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Helium Loss (Implantation (2 adjacent grains (producing He by U-Th decay,…
Helium Loss
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Most crystal
= zoned
i.e. Do not have equilibrium conc profile of elements (U, Th, Pb)
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He conc in crystal = f(
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Once crumbled up, no knowledge whether
--> grain adjacent to another radiogenic mineral...
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To account for He heterogeneity, must consider:
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- U-Th distribution in sample
- Crystal situation wrt other radiogenic minerals
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