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The chronological repartition of mineral deposits in Mexico and the southern USA coincides with the distribution of the three main volcanic pulses of the Sierra Madre Occidental. These pulses are Eocene to early Miocene in age, suggesting that a broad migration occurred from northwest to southeast, where the last ignimbrite flare-up occurred. The most fertile event occurred from 36 to 28 Ma and produced...
Uranium deposits form in a variety of settings. They are partially controlled by the secular evolution of Earth processes, including deposits in extension-related settings such as the intra-cratonic Rio Grande rift. Plio-Quaternary volcanism, mineral deposits, and hydrothermal spots occur along the Chihuahua Central Graben. The age of the Sierra de Gomez U-deposit is 1.8Ma (based on LA-MC-ICP-MS dating...
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