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Charlotte L. Devitre

@cljdevitre.bsky.social
308 followers 240 following 19 posts

Postdoctoral scholar at UC Berkeley | Volcanoes🌋 Spectroscopy ⚡, inclusions, aerosols, human health | B.S. Universidad de Costa Rica | PhD Cornell University | Volleyball🏐amateur photographer 📷❤️ hybrid human 🇨🇷 🇫🇷 🇮🇳 🇨🇦My views are my own

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Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
Could this be done elsewhere? H2O mixed with CO2 can affect results, and other volcanoes are not as dry. So, we compiled the proportion of H2O in magmas around the world using >4000 melt inclusions (pockets of magma in crystals). Turns out, it could be useful at many other hazardous volcanoes (5/5)
Map of the world showing median proportion of H2O exsolved from magmas. Red and orange locations are sufficiently low to apply this method (i.e., Galápagos, Cabo Verde, Canary Islands, Iceland, East African Rift, Hawaiʻi)
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Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
How we did it: HVO personnel mailed the samples. We started at 9 am PT on the day of sample receipt. By 7 pm PT (5pm HT) fluid inclusions showed the crystals had been stored in the upper reservoir of Kīlauea prior to eruption. 2 subsequent days of additional analyses did not change the results (4/5)
Main results from the simulation. Fluid inclusions were trapped at ~1-2 km depth, which corresponds with the well-constrained Halemaʻumaʻu magma reservoir.
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Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
As magma rises, gases like CO2 escape. Crystals growing in the magma trap the bubbles forming FI. If not modified, their CO2 density reflects the system’s pressure at trapping. By measuring many with Raman spectroscopy, we calculate the pressure—and depth— of magma storage before eruption (3/5)
Graph depicts the relationship between Pressure and Depth of fluid inclusion entrapment with CO2 density at different magmatically relevant temperatures. Increasing pressure and depth mean increasing density of CO2.GIF Taken from IRIS/Active Earth monitor. Depicts how gases escape (exsolve) from magmas as they ascend towards the surface. CO2 is the first to exsolve, followed by sulfur and water.
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Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
"Where are the magmas coming from?" is a key question for scientists and nearby communities during eruptions. It helps model the system and assess eruption evolution. Faster than traditional geochemical tools, fluid inclusions were promising but hadn’t been tested in real time – until now (2/5).
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Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
⚒️ Can we measure magma storage depths fast enough to support volcanic observatories during ongoing eruptions? In our new JPET paper, we teamed up with HVO to simulate real-time rapid-response CO2 fluid inclusion barometry at Kīlauea, HI. We got depths in 1 day! How? Read on! (1/5)
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Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
Could this be done elsewhere? H2O mixed with CO2 can affect results, and other volcanoes are not as dry. So, we compiled the proportion of H2O in magmas around the world using >4000 melt inclusions (pockets of magma in crystals). Turns out, it could be useful at many other hazardous volcanoes (5/5)
Map of the world showing median proportion of H2O exsolved from magmas. Red and orange locations are sufficiently low to apply this method (i.e., Galápagos, Cabo Verde, Canary Islands, Iceland, East African Rift, Hawaiʻi)
010
Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
How we did it: HVO personnel mailed the samples. We started at 9 am PT on the day of sample receipt. By 7 pm PT (5pm HT) fluid inclusions showed the crystals had been stored in the upper reservoir of Kīlauea prior to eruption. 2 subsequent days of additional analyses did not change the results (4/5)
Main results from the simulation. Fluid inclusions were trapped at ~1-2 km depth, which corresponds with the well-constrained Halemaʻumaʻu magma reservoir.
010
Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
As magma rises, gases like CO2 escape. Crystals growing in the magma trap the bubbles forming FI. If not modified, their CO2 density reflects the system’s pressure at trapping. By measuring many with Raman spectroscopy, we calculate the pressure—and depth— of magma storage before eruption (3/5)
Graph depicts the relationship between Pressure and depth of entrapment with CO2 density of a fluid inclusion at different magmatically relevant temperatures. Increasing pressure and depth mean increasing density of CO2. GIF Taken from IRIS/Active Earth monitor. Depicts how gases escape (exsolve) from magmas as they ascend towards the surface. CO2 is the first to exsolve, followed by sulfur and water.
030
Charlotte L. Devitre @cljdevitre.bsky.social · 17/01/2025
"Where are the magmas coming from?" is a key question for scientists and nearby communities during eruptions. It helps model the system and assess eruption evolution. Faster than traditional geochemical tools, fluid inclusions were promising but hadn’t been tested in real time – until now (2/5).
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