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(2020) Clumped Isotope Geochemistry of Fe-Carbonates from the Gunflint Formation

Holme E, Henkes G, Rasbury T, Fralick P, Tosca N & Hurowitz J


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06l: Room 2, Thursday 25th June 00:54 - 00:57

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Submitted by Daniel Gregory on Thursday 18th June 21:08
Thank you for the great talk. I have two questions, first what did you do to ensure that most / all the calcite and ankerite was gone after the initial acid treatment? Second, you showed that the O and clumped isotopes are consistent with low W/R ratio diagenesis but mention that more work needs to be done to confirm this. What work would you do / are you currently doing?

Submitted by Elizabeth Swanner on Monday 22nd June 12:43
I am curious about the implications of the relatively high temperatures from siderite. Does this mean they precipitated from a warm fluid, or can the temperatures associated with later diagenetic or metamorphic events be recorded by clumped isotopes?

Submitted by Chad Wittkop on Monday 22nd June 17:32
Hello, this is very interesting work and I enjoyed hearing about it. Thank you for presenting. Were you able to ensure a complete acid reaction with siderite samples after 60 minutes? And a second question if there is time: Do you know the Mn content of your siderite samples? Thanks again - I look forward to hearing more about your work in the future. cw

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