4 He (ncc) volume of helium in ncc at STP; Sm <0.01 ng; TAU = total analytical uncertainty; Ft = alpha retention factor; D230 calculated from zircon Th/U and HD Th/U = 3.4 and HDA Th/U = 3.5; sampling
Plagioclase mineral separates from basaltic extrusive (lavas) and instrusive (dolerite and gabbro) samples from the Dronning Maud Land area of Antarctica were dated by the incremental heat
