TY - RPRT TI - Oxygen isotope variations in granulite-grade iron formations: constraints on oxygen diffusion and retrograde isotopic exchange AU - Z.D. Sharp AU - J. R. O’Neil AU - E.J. Essene PY - 1988 DO - 10.1007/bf00372366 UR - https://pubs.usgs.gov/publication/70013745 ID - 70013745 ER -