page 01 · about marvin↓ scroll, or pick a tab ↑

Marvin
Lopez Acevedo.

i read pressure & temperature out of rocks — geobarometry of arc magmas, m.sc → ph.d.

igneous petrologygeobarometryEPMAfield workagentic eng.

see the work →say hi CV.pdf ↓

thin section · plagioclase PPL

sample MX-04 · '25

outcrop · andesite flow

Cerro Negro, '24

currently:
pyroxene
thermobarometry
+ lab agents 🌋

— Now

Calibrating pyroxene P–T on CVZ samples

— Place

Dept. of Geosciences

— Reading

Putirka (2008) — again

— Playing

Star Citizen · ONI

— about · 01marvin, at a glance.

— bio

A 25-year-old who keeps asking rocks where they've been.

I'm a Masters-to-PhD researcher in igneous petrology, building geobarometers for arc magmas. Specifically: pyroxene and amphibole thermobarometry on the Central Volcanic Zone, calibration work, and the messy field-to-lab pipeline that connects them.

I came up through fieldwork — I like long sampling traverses, careful logs, and the slow conversation a thin section makes with a microscope. Lately I've been pairing that with agentic engineering: AI-augmented lab pipelines, automated EPMA reduction, design-systems-for-science.

— marvin, may '26

— now

Calibrating pyroxene P–T on CVZ samples. Year 1 of the PhD.

— by the numbers

samples

field sites

papers

220

pp · M.Sc thesis

— off-hours

🚀 Star Citizen
🌬 Oxygen Not Included
🤖 lab agents w/ Claude
📐 design systems

— current obsession

Amphibole zoning in calc-alkaline arcs.

why it matters →

Sharp compositional steps record sudden P–T changes — a stratigraphy you can read on a 200-µm crystal.

— stack

python · pandas · matplotlib
EPMA · LA-ICP-MS · XRF
ArcGIS · QGIS · field tablets
claude code · agents · MCP
design tokens · figma

— work · 02stratigraphy of what I've done.

2026
0 m

2025
~18 m

2024
~42 m

2023
~76 m

2022
basement

LAYER 01 · ph.d · ongoing

Pyroxene Thermobarometry of the Central Volcanic Zone

Calibrating clinopyroxene–liquid and orthopyroxene thermobarometers against high-quality experimental datasets, then applying them to a new CVZ sample suite. Lead author, paper in prep for JPet.

LAYER 02 · field campaign

Andean Arc Sampling Campaign

Six weeks across four volcanic centres in the southern CVZ. 62 hand samples, full structural logs, drone DEMs. Co-investigator with the Geosciences Field Lab.

LAYER 03 · AGU '24 · poster

Plagioclase–Amphibole Thermometry Benchmark

Benchmarking five widely-used plag–hbl thermometers against natural calibration data. Found systematic offsets above 950 °C; proposed a corrected lookup. Poster, AGU Fall '24.

LAYER 04 · m.sc thesis · 2023