fig13.htm

Figure 13. Comparison of 3He and 4He concentrations in whole-samples (melt) and in vehicles (mill).
Milling (Section 3.1) generally liberates a considerable portion of 3He (Average and Median approx 0.4) and a smaller portion of 4He (Av and Me approx 0.1). This comparison shows that 3He-bearing vesicles are larger and can be open (by milling) easier than radiation damage tracks containing radiogenic 4He.


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