Abstract Details
(2020) Controls on O and H Isotope Compositions of Clay Minerals and Porewater in Ordovician Shales, Ontario, Canada
Longstaffe F, Chauvin S, Clark I & Kennell-Morrison L
https://doi.org/10.46427/gold2020.1634
08b: Room 3, Monday 22nd June 22:45 - 22:48
Fred Longstaffe
Skylar Chauvin
Ian Clark View abstracts at 2 conferences in series
Laura Kennell-Morrison View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Skylar Chauvin
Ian Clark View abstracts at 2 conferences in series
Laura Kennell-Morrison View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
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 Laura Kennell-Morrison on Monday 22nd June 02:01
What differences do you anticipate to observe when running similar experiments on the swelling clays (i.e., in the context of both the capacity to, and the complexity associated with, classifying and characterizing such isotopic exchange)?
What differences do you anticipate to observe when running similar experiments on the swelling clays (i.e., in the context of both the capacity to, and the complexity associated with, classifying and characterizing such isotopic exchange)?
Submitted by Fred Longstaffe on Monday 22nd June 23:10
The biggest challenge will be complete removal of interlayer water without driving hydroxyl hydrogen exchanges during the process. Any residual interlayer water will become increasingly enriched in O-18 and H-2, which will confound measurement of the hydroxyl hydrogen (and oxygen) isotope compositions. Efforts to remove that interlayer water will in turn drive hydrogen and potentially oxygen isotope exchange between structural hydrogen and hydroxyl oxygen. The challenge will vary from smectite to smectite, depending on its crystal chemistry, grain size and crystallinity. It will be good fun to separate the effects.
The biggest challenge will be complete removal of interlayer water without driving hydroxyl hydrogen exchanges during the process. Any residual interlayer water will become increasingly enriched in O-18 and H-2, which will confound measurement of the hydroxyl hydrogen (and oxygen) isotope compositions. Efforts to remove that interlayer water will in turn drive hydrogen and potentially oxygen isotope exchange between structural hydrogen and hydroxyl oxygen. The challenge will vary from smectite to smectite, depending on its crystal chemistry, grain size and crystallinity. It will be good fun to separate the effects.
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