Abstract Details
(2020) The Multiple Fates of Subducted Sediments
Klein BZ & Behn MD
https://doi.org/10.46427/gold2020.1332
The author has not provided any additional details.
03a: Room 1, Wednesday 24th June 00:33 - 00:36
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 Marcos García-Arias on Monday 22nd June 17:42
Dear Dr. Klein. Your work is very interesting, for I am studying the compositional variablity of Cordilleran granitoids and how the influence of the composition of teh diapirs may influence that of teh granitoids. Have you considered that the diapirs may contain mixtures of sediments and basaltic components of the subducted slab? Or did your reserach indicate that only sediments ascend as diapirs, without contribution from the basaltic slab?
Thanks for that question. The sources for diapirs could certainly be more melange like and contain a mix of different components including MORB. However, MORB would likely be denser than mantle at these conditions, and so only a limited amount of MORB could be entrained in the diapirs before they are no longer positively buoyant. We are definitely planning to look at some of these questions in the future!
Dear Dr. Klein. Your work is very interesting, for I am studying the compositional variablity of Cordilleran granitoids and how the influence of the composition of teh diapirs may influence that of teh granitoids. Have you considered that the diapirs may contain mixtures of sediments and basaltic components of the subducted slab? Or did your reserach indicate that only sediments ascend as diapirs, without contribution from the basaltic slab?
Thanks for that question. The sources for diapirs could certainly be more melange like and contain a mix of different components including MORB. However, MORB would likely be denser than mantle at these conditions, and so only a limited amount of MORB could be entrained in the diapirs before they are no longer positively buoyant. We are definitely planning to look at some of these questions in the future!
Submitted by Aleksandra Redlinska-Marczynska on Tuesday 23rd June 14:18
Great presentantion, thanks. What the size of diapirs depend on? What variables did you use to calculate the results?
Based on scalings arguments, diapir diameter can be related to the sediment layer thickness. The range of diapir diameters we look at correspond to ~100-1200 m sediment layer thicknesses, which is consistent with other estimates.
Great presentantion, thanks. What the size of diapirs depend on? What variables did you use to calculate the results?
Based on scalings arguments, diapir diameter can be related to the sediment layer thickness. The range of diapir diameters we look at correspond to ~100-1200 m sediment layer thicknesses, which is consistent with other estimates.
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