Abstract Details
(2020) Loa-Kea Hawai‘i Geochemical Trends: Recent Findings and Future Directions
Weis D, Williamson N, Harrison L & Bilenker L
https://doi.org/10.46427/gold2020.2842
The author has not provided any additional details.
05h: Room 2, Saturday 27th June 05:54 - 05:57
Dominique Weis
View all 12 abstracts at Goldschmidt2020
View abstracts at 22 conferences in series
Nicole Williamson View all 3 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Lauren N. Harrison View all 3 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Laura Bilenker View all 2 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Nicole Williamson View all 3 abstracts at Goldschmidt2020 View abstracts at 2 conferences in series
Lauren N. Harrison View all 3 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Laura Bilenker 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 Keith Putirka on Wednesday 24th June 20:04
Hi Dominique - great overview. I am wondering whether the "Average deep pacific mantle" in your Pb-Pb plot is also distinct in major oxides, or might have particularly strong TITAN (Ti, Ta, Nb) enrichments, as Matt Jackson and Prytulak and Elliot have described (in Matt's case, showing an apparent connection of TITAN to high 3He/4He) source? -Keith
Hi Keith, One of the major and common issues we encounter in comparing data on Hawaii is the fact that for only a very few samples, ME, TE and isotopic compositions have been measured on the same powder. We struggled with that in Jackson et al G-cubed 2012 (ME). This is also why in our lab, we have undertaken the systematic analyses of some key islands/sections (including resampling to have exact location of the samples). This being said, the average deep Pacific mantle, i.e. the Kea end-member, is FOZO, C or PREMA. I will follow up via e-mail.
Hi Dominique - great overview. I am wondering whether the "Average deep pacific mantle" in your Pb-Pb plot is also distinct in major oxides, or might have particularly strong TITAN (Ti, Ta, Nb) enrichments, as Matt Jackson and Prytulak and Elliot have described (in Matt's case, showing an apparent connection of TITAN to high 3He/4He) source? -Keith
Hi Keith, One of the major and common issues we encounter in comparing data on Hawaii is the fact that for only a very few samples, ME, TE and isotopic compositions have been measured on the same powder. We struggled with that in Jackson et al G-cubed 2012 (ME). This is also why in our lab, we have undertaken the systematic analyses of some key islands/sections (including resampling to have exact location of the samples). This being said, the average deep Pacific mantle, i.e. the Kea end-member, is FOZO, C or PREMA. I will follow up via e-mail.
Submitted by Keith Putirka on Wednesday 24th June 20:08
I've just looked back at Karen's Galapagos data and it seems that her pink triangles, which have the highest Nb enrichments, drift away from the common plume source, and are closer to HIMU, and am now wondering if Hawaiian lavas do the same, and what that means for TITAN + 3He/4He as signals of the deep source? -Keith
There is no HIMU component in Hawaii.
I've just looked back at Karen's Galapagos data and it seems that her pink triangles, which have the highest Nb enrichments, drift away from the common plume source, and are closer to HIMU, and am now wondering if Hawaiian lavas do the same, and what that means for TITAN + 3He/4He as signals of the deep source? -Keith
There is no HIMU component in Hawaii.
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