Fig. 2.

(A) BSE image of pyrite and electrum (El) from the stage V Cleopatra vein showing complex, multigenerational growth zoning and the location of SIMS δ³⁴S analytical transects A–A’, B–B’, and C–C’, as well as SIMS δ³⁴S results for analyses outside of the transects and EMP results for Au and As (BD = below detection). The electrum is interpreted to be in textural equilibrium with the outermost pyrite growth zone based on the lack of reaction and/or replacement textures along the contacts between the electrum and pyrite which are sharp and largely euhedral. (B–D) plots of δ³⁴S_pyr vs. distance for transects A–A’, B–B’, and C’–C’, respectively.