Posted on 09/15/2022 4:24:01 PM PDT by BenLurkin
Recent Icelandic rifting events have illuminated the roles of centralized crustal magma reservoirs and lateral magma transport, important characteristics of mid-ocean ridge magmatism. A consequence of such shallow crustal processing of magmas is the overprinting of signatures that trace the origin, evolution and transport of melts in the uppermost mantle and lowermost crust.
Here we present unique insights into processes occurring in this zone from integrated petrologic and geochemical studies of the 2021 Fagradalsfjall eruption on the Reykjanes Peninsula in Iceland.
Geochemical analyses of basalts erupted during the first 50 days of the eruption, combined with associated gas emissions, reveal direct sourcing from a near-Moho magma storage zone. Geochemical proxies, which signify different mantle compositions and melting conditions, changed at a rate unparalleled for individual basaltic eruptions globally. Initially, the erupted lava was dominated by melts sourced from the shallowest mantle but over the following three weeks became increasingly dominated by magmas generated at a greater depth.
This exceptionally rapid trend in erupted compositions provides an unprecedented temporal record of magma mixing that filters the mantle signal, consistent with processing in near-Moho melt lenses containing 107–108 m3 of basaltic magma. Exposing previously inaccessible parts of this key magma processing zone to near-real-time investigations provides new insights into the timescales and operational mode of basaltic magma systems.
(Excerpt) Read more at nature.com ...
It was a dark and stormy night. The recent Icelandic rifting events had illuminated the roles of centralized crustal magma reservoirs and lateral magma transport, important characteristics of mid-ocean ridge magmatism.
I feel an igneous extrusion coming on!
I would take the whole article with a grain of basalt.
CC
I hope Husavik isn’t harmed...it’s my hometown. At least according to the song that is...
I hate it when that happens.
let me guess, you used to be a stand up comic but they took you for granite.
They took me for granite so I quit the job and got stoned.
CC
“I would take the whole article with a grain of basalt.”
I’m not schisting you, THAT was funny!
The magnetic field will be disrupted by government scientists attempting to weaponize it. The altered field malfunction will eventually result in bombarding the earth with meteorites causing much destruction and they will blame it on nature. Eventually they do get it under control.
Or so it has been told. 😉
But of quartz.
Sounds like you’re between a rock and a hard place. Don’t let it erode you down.
Journey to the Center of the Earth ping.
Why, aren't you gneiss!
Rick Wakeman, “Journey to the Center of the Earth” (live 2012)
https://www.youtube.com/watch?v=ab1SFDuMpgY
I’m just sedimental I guess.
Is that an igneous extrusion, or are you just happy to see us? /jk
That would explain the volcanic, glassy-eyed stare.
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