Comparison of the expected concentrations of primordial nebular gas dissolved in the mantle with the measured deep mantle concentrations measured by B. Marty (2012) in plume samples. A dotted one-to-one line centered on ​​​​​​²²Ne is shown to illustrate how the ³⁶Ar, ⁸⁴Kr, and ¹³⁰Xe reservoirs cannot be purely explained by the capture of primordial volatiles as isotopic measurements argue is the case for Ne (C. D. Williams & S. Mukhopadhyay 2019) and most likely He (see Section 5.1).