Abstract Details
(2020) Spatial and Temporal Variations in Mantle Source and Subduction Contributions in the Southern Cascade Arc: Insights from Mafic Magma Geochemistry
Johnson E, Shaffer J, Cole M, Ramos F & Calvert A
https://doi.org/10.46427/gold2020.1219
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05d: Room 2, Friday 26th June 22:36 - 22:39
Emily Johnson
View all 2 abstracts at Goldschmidt2020
View abstracts at 4 conferences in series
Jamie Shaffer View abstracts at 2 conferences in series
Meredith Cole View abstracts at 2 conferences in series
Frank Ramos View abstracts at 10 conferences in series
Andrew Calvert
Jamie Shaffer View abstracts at 2 conferences in series
Meredith Cole View abstracts at 2 conferences in series
Frank Ramos View abstracts at 10 conferences in series
Andrew Calvert
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 Chiara Maria Petrone on Friday 26th June 13:29
Hi Emily, very nice presentation. Have you calculated the contribution of depleted and enriched mantle and is there a time relationship and/or geographic variation in the different mantle contributions?
Hi Chiara, thank you! The short answer is yes: there mainly seems to be a geographic variation in the mantle, with the depleted mantle found in the southern part of Oregon/northern California. North of Crater Lake (into Central Oregon) there seems to be a shift to the more enriched mantle. There do not appear to be any temporal trends, except for the fact that the central Oregon volcanism is the youngest in the arc (and tapping the more-enriched mantle)
Hi Emily, very nice presentation. Have you calculated the contribution of depleted and enriched mantle and is there a time relationship and/or geographic variation in the different mantle contributions?
Hi Chiara, thank you! The short answer is yes: there mainly seems to be a geographic variation in the mantle, with the depleted mantle found in the southern part of Oregon/northern California. North of Crater Lake (into Central Oregon) there seems to be a shift to the more enriched mantle. There do not appear to be any temporal trends, except for the fact that the central Oregon volcanism is the youngest in the arc (and tapping the more-enriched mantle)
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