Abstract Details
(2020) On Mike Garcia’s Contributions to the Understanding of Ocean-Island Volcanism
Geist D
https://doi.org/10.46427/gold2020.812
The author has not provided any additional details.
05h: Room 2, Saturday 27th June 05:33 - 05:36
Dennis Geist
View abstracts at 10 conferences in series
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Submitted by Keith Putirka on Wednesday 24th June 01:41
Hi Dennis - great overview of Mike's contributions. Is it fair to say that picrites come to dominate the submarine portions of oceanic volcanoes as they grow, and that this is due to their greater density? So as a volcano grows, lower-density magmas continue to rise up to shallow, and eventually subaerial magma chambers, whereas picrites can be carried upwards no further than the submarine flanks? And so the most mafic erupted magmas would be the youngest magmas erupted at the deepest portions of the oldest/largest volcanoes? Thanks. -Keith
Hi Dennis - great overview of Mike's contributions. Is it fair to say that picrites come to dominate the submarine portions of oceanic volcanoes as they grow, and that this is due to their greater density? So as a volcano grows, lower-density magmas continue to rise up to shallow, and eventually subaerial magma chambers, whereas picrites can be carried upwards no further than the submarine flanks? And so the most mafic erupted magmas would be the youngest magmas erupted at the deepest portions of the oldest/largest volcanoes? Thanks. -Keith
Submitted by Dominique Weis on Friday 26th June 18:49
Hello Dennis! When you compare water contents in Hawaii and those in Galapagos, you are comparing between tholeiitic basalts in Hawaii and alkaline in Galapagos, as you said. That would imply different contents to start with. Any comment?
Hello Dennis! When you compare water contents in Hawaii and those in Galapagos, you are comparing between tholeiitic basalts in Hawaii and alkaline in Galapagos, as you said. That would imply different contents to start with. Any comment?
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