Tracing Archaean terranes under Greenland's Icecap: U-Th-Pb-Hf isotopic study of zircons from melt-water rivers in the Isua area

The Archaean gneisses of the Nuuk area (southern West Greenland) are partitioned into tectonostratigraphic terranes - blocks of arc-like crust that evolved independently until they coalesced by collisional orogeny. To 'map' terranes to the east under th