Table 1 Summary of iron isotope data for TAG sulfides.

From: Iron isotopes constrain sub-seafloor hydrothermal processes at the Trans-Atlantic Geotraverse (TAG) active sulfide mound

Sample type

Mineral

n

Mean δ56Fe (‰)a

Mean 2σ

Minimum δ56Fe (‰)a

Maximum δ56Fe (‰)a

Overall

Pyrite, Chalcopyrite

50

0.04

0.08

−1.27

0.56

Massive sulfide

Pyrite

9

−0.42

0.08

−1.27

0.28

Sulfide in anhydrite veins

Pyrite

5

−0.24

0.07

−0.52

0.06

Sulfide in anhydrite veins

Chalcopyrite

3

0.01

0.07

−0.04

0.08

Sulfide in quartz-pyrite stringer veins

Pyrite

3

0.22

0.07

0.09

0.38

Sulfide in breccia clasts

Pyrite

22

0.12

0.09

−0.32

0.37

Disseminated sulfide in altered basalt host rock

Pyrite

8

0.47

0.07

0.34

0.56

  1. aδ56Fe corresponds to 56Fe/54Fe ratio relative to IRMM-14 international standard.
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