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 ...
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There is no need to evacuate, but I am not going to the Blue Lagoon myself
Finger-pointing already...
They're from the government and they're there to help!
Some things are universal, aren't they.
The locals, and tourists, if needed ought to bone up on what happened at Heimaey in '73...
Meanwhile...
May need to limit power consumption in case of eruption
Check out the bit about not charging your EV at home...
Oh, boy...
I hope the folks who bugged out of the Blue Lagoon in the middle of the night last night left their cabbies a really big tip.
Rangers investigate the smoke in the lava
Okay, who's got the magma nip...
Wonder if they’re concerned about eruptions in more than one location...
An eruption may have started or be imminent…
FYI ping.
Emergency level of civil defense in Grindavík
They're evacuating the town.
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