Did the massive magnetite “lava flows” of El Laco (Chile) form by magmatic or hydrothermal processes? New constraints from magnetite composition by LA-ICP-MS | Semantic Scholar
@article{Dare2015DidTM,
title={Did the massive magnetite “lava flows” of El Laco (Chile) form by magmatic or hydrothermal processes? New constraints from magnetite composition by LA-ICP-MS},
author={Sarah A. S. Dare and S-J. Barnes and Georges Beaudoin},
journal={Mineralium Deposita},
year={2015},
volume={50},
pages={607-617},
url={https://api.semanticscholar.org/CorpusID:129783571}
}The El Laco magnetite deposits consist of more than 98 % magnetite but show field textures remarkably similar to mafic lava flows. Therefore, it has long been suggested that they represent a rare example of an effusive Fe oxide liquid. Field and petrographic evidence, however, suggest that the magnetite deposits represent replacement of andesite flows and that the textures are pseudomorphs. We determined the trace element content of magnetite by laser ablation inductively coupled plasma mass…