Obsidians from major Ecuadorian sources (outcrops) were analyzed by electron spin resonance, SQUID magnetometry and 57Fe Mössbauer spectroscopy. If the last technique allows to discriminate obsidians from the Quiscatola source, an association of ESR with SQUID magnetometry permits to differentiate obsidians from the sources of Cotopaxi volcano, from the Quiscatola and Mullumica-Callejones sources of the Chacana caldera and to infer that the 12 analyzed obsidians from the pre-Hispanic site of La Maná come from the Mullumica-Callejones source. © 2008 Springer Science+Business Media B.V.
Duttine, M., Scorzelli, R. B., Poupeau, G., Bustamante, A., Bellido, A. V., Lattini, R. M., & Guillaume-Gentil, N. (2007). Provenance study of obsidians from the archaeological site of la Maná (Ecuador) by electron spin resonance (ESR), SQUID magnetometry and 57Fe Mössbauer spectroscopy. Hyperfine Interactions, 85-90. https://doi.org/10.1007/s10751-008-9592-1