Are high 3He/4He ratios in oceanic basalts an indicator of deep-mantle plume component?

Meibom, A., Anderson, D.L., Sleep, N.H., Frei, R., Chamberlain, C.P., Hren, M.T., and Wooden, J.J. (2003) Are high 3He/4He ratios in oceanic basalts an indicator of deep-mantle plume component? Earth and Planetary Sciences, v. 208, p. 197-204. doi: 10.1029/2002GL016864