Abstract Oxygen fugacity (ƒO2) conditions were established for Três Ranchos IV (TR-IV, diamond-bearing) and Limeira I (LM-I, barren) kimberlite intrusions, in Alto Paranaíba Alkaline Province, to cons
The data archive includes compositional and geographic data for geologic samples from the Alca obsidian source in the Peruvian Andes. Compositional data for geologic samples from six other Peruvian ob