South African crustal fracture fluids preserve paleometeoric water signatures for up to tens of millions of years por Heard, A, Warr, O, Borgonie, G, Linage, B, Kuloyo, O, Fellowes, J, Magnabosco, C, Lau, M, Erasmus, M, Cason, E, van Heerden, E, Kieft, T, Mabry, J, Onstott, T, Lollar, B, Ballentine, C