[1] We measured He, Sr, Nd, Pb, and Os isotope ratios and major and trace element concentrations in stratigraphically and paleomagnetically controlled shield-stage lavas from Kauai, Hawaii. The range of He/He ratios (17–28 RA) from Kauai is similar to that reported from Loihi and thus challenges the prevailing notion that high He/He ratios are restricted to the preshield stage of Hawaiian magma...