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Abstract Details

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

Haag B & Thakurta J

Haag B & Thakurta J (2020) Goldschmidt Abstracts, 2020 922

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08m: Room 3, View in program

Beau Haag
Joyashish Thakurta

Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.

Submitted by Daniel Gregory on
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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