Fig. 6: Correlation of the (3He/4He)tr ratios versus (40Ar/36Ar)tr ratios of the lunar samples.
From: Weak influence of the secondary surface processes on the regolith of Chang’E-5 landing site
The latter is an antiquity indicator of the solar wind, as introduced above. The (3He/4He)tr ratios of the CE-5 bulk soil and ilmenite both fit the correlation. The uncertainties of (3He/4He)tr ratios of CE-5 samples were estimated on the assumption that the cosmogenic 3He and radiogenic 4He with different loss proportions (the symbol represents 50% loss of 3Hec). The data of Apollo soils are from previous reports16,17,19,22,28,31,53,54,57.
