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# Tracing magma generation and evolution in a multi-level magma plumbing system at the Izu rear-arc

## Details

**Authors** Edgar et al.

**Year** 2026

**Publisher** Contributions to Mineralogy and Petrology

**Discipline** Geology

[Read it at the publisher](https://doi.org/10.1007/s00410-026-02350-9) 
10.1007/s00410-026-02350-9

## In authors' words

### What they found (results)

Plagioclase crystal chemistry from a 4.0-4.4 Ma pumice succession in the Izu rear-arc revealed two distinct compositional populations (An 30-60 and An 75-95) reflecting magma stored and mixed across four discrete depth levels, from 30-38 km mantle-wedge pockets up to 4-6 km upper-crustal reservoirs.

## Commentary

### In short

A single erupted magma is shown to be the product of a nested, multi-level system of distinct source reservoirs, with a clear compositional boundary marking two contributing populations.

**Patterns it shows** D, S

**Added** 2026-09-10

**How to cite this** Edgar et al. (2026). Tracing magma generation and evolution in a multi-level magma plumbing system at the Izu rear-arc. Contributions to Mineralogy and Petrology.