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(2020) S-Isotope Ratios in Paleoproterozoic Host Rocks of Ni-Cu Sulfide Deposits at the Midcontinent Rift

Haag B & Thakurta J


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08m: Room 3, Tuesday 23rd June 22:36 - 22:39

Beau Haag
Joyashish Thakurta View abstracts at 4 conferences in series

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Submitted by Daniel Gregory on Friday 19th June 02:07
Thank you for the presentation. I am wondering how the amount of sulfide present varies down core? Do you see a decrease in S abundance in the heavier S intervals? If you don't how do you explain that in the context of needing to invoke relatively S concentration in the ocean to get that degree rayleigh fractionation?
Daniel, we did not find any relationship between S-isotope ratios and the concentrations of sulfide minerals in our collected samples. We interpreted the departure from the general stratigraphic trend to much higher S-isotope ratios within a specific interval by Raleigh Fractionation of the sea-water within the basin in a closed system regardless of the quantity of sulfur therein.

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