Mineral disequilibrium in lavas explained by convective self-mixing in open magma chambers

@article{Couch2001MineralDI,
  title={Mineral disequilibrium in lavas explained by convective self-mixing in open magma chambers},
  author={Scott Couch and R. Stephen J. Sparks and Michael Royce Carroll},
  journal={Nature},
  year={2001},
  volume={411},
  pages={1037-1039}
}
Characteristic features of many porphyritic andesite and dacite lavas are that they are rich in crystals and display a range of disequilibrium features, including reversely zoned crystals, resorption surfaces, wide ranges of mineral compositions and minerals which are not in equilibrium with the surrounding rock matrix. These features are often interpreted as evidence of the mixing of magmas of contrasting composition, temperature and origin. Here, however, we propose that such features can… CONTINUE READING