Abstract Details
(2020) High-Ca Olivines in Ultramafic and Alkali Lamprophyres of Kola Alkaline Province (Russia) as Indicators of Source Heterogeneity
Vozniak A, Sazonova L & Nosova A
https://doi.org/10.46427/gold2020.2695
The author has not provided any additional details.
03i: Room 1, Thursday 25th June 22:24 - 22:27
Alexei Vozniak
Lyudmila Sazonova View abstracts at 2 conferences in series
Anna Nosova View all 3 abstracts at Goldschmidt2020 View abstracts at 4 conferences in series
Lyudmila Sazonova View abstracts at 2 conferences in series
Anna Nosova View all 3 abstracts at Goldschmidt2020 View abstracts at 4 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 Anthony Lanati on Thursday 25th June 14:04
I am intrigued by the fact your findings seem to suggest a metasomatic event or a shallowing of the SCLM in the area between 1.95 and 1.88 Ga. It seems that the addition of a carbonated source for the Turj Mys cluster would represent a material change in the SCLM composition from the Kandalshka locality which is presumably sampling deeper melts. So, I was wondering if you see a modal or chemical reduction in the amount of potassic and incompatible enriched phases such as phlogopite and amphibole that might support a metasomatic scavenging of the incompatible phases in a secondary event rather than as a primary mechanism? Thanks for a really interesting presentation!
I am intrigued by the fact your findings seem to suggest a metasomatic event or a shallowing of the SCLM in the area between 1.95 and 1.88 Ga. It seems that the addition of a carbonated source for the Turj Mys cluster would represent a material change in the SCLM composition from the Kandalshka locality which is presumably sampling deeper melts. So, I was wondering if you see a modal or chemical reduction in the amount of potassic and incompatible enriched phases such as phlogopite and amphibole that might support a metasomatic scavenging of the incompatible phases in a secondary event rather than as a primary mechanism? Thanks for a really interesting presentation!
Submitted by Kathryn Watts on Thursday 25th June 19:19
I see that you have carbonates listed in the groundmass in both types of alkaline ultramafic units– are they primary or secondary? What phase(s)? On the conclusion slide, the source for Kandalashka melt is listed as peridotite plus carbonate, but carbonate is not listed in the source for Turj Mys. Do carbonate or other unique inclusions occur within the olivines, and do these vary for the different units?
I see that you have carbonates listed in the groundmass in both types of alkaline ultramafic units– are they primary or secondary? What phase(s)? On the conclusion slide, the source for Kandalashka melt is listed as peridotite plus carbonate, but carbonate is not listed in the source for Turj Mys. Do carbonate or other unique inclusions occur within the olivines, and do these vary for the different units?
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