Mono-sample Pb-Pb dating of pyrrhotite and tourmaline: Proterozoic vs. Archean intracratonic gold mineralization in Zimbabwe

TY - JOUR

T1 - Mono-sample Pb-Pb dating of pyrrhotite and tourmaline: Proterozoic vs. Archean intracratonic gold mineralization in Zimbabwe

AU - Frei, R.

AU - Pettke, T.

PY - 1996/1/1

Y1 - 1996/1/1

N2 - Stepwise Pb leaching enabled direct, precise dating of individual samples of hydrothermal pyrrhotite (1.93 ± 0.05 Ga) and paragenetically older tourmaline (2.02 ± 0.02 Ga) from a shear-zone-hosted gold mineralization within the Archean Zimbabwe craton. These ages reveal a multistage Proterozoic hydrothermal event within the craton. The presence of a scheelite-tourmaline ore dated at 2.65 ± 0.01 Ga within the same shear zone may point to an Archean precursor. Because of its capability to demonstrate Pb isotope (dis)equilibrium between associated phases, single-mineral Pb leaching also traces genetic processes.

AB - Stepwise Pb leaching enabled direct, precise dating of individual samples of hydrothermal pyrrhotite (1.93 ± 0.05 Ga) and paragenetically older tourmaline (2.02 ± 0.02 Ga) from a shear-zone-hosted gold mineralization within the Archean Zimbabwe craton. These ages reveal a multistage Proterozoic hydrothermal event within the craton. The presence of a scheelite-tourmaline ore dated at 2.65 ± 0.01 Ga within the same shear zone may point to an Archean precursor. Because of its capability to demonstrate Pb isotope (dis)equilibrium between associated phases, single-mineral Pb leaching also traces genetic processes.

UR - http://www.scopus.com/inward/record.url?scp=84874952501&partnerID=8YFLogxK

M3 - Journal article

SN - 0091-7613

VL - 24

SP - 823

EP - 826

JO - Geology

JF - Geology

IS - 9

ER -