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Geochemical evolution of Middle—Late Cenozoic magmatism in the northern part of the Rio Grande Rift, Western United States

Citation

T A Yasnygina, N N Fefelov, S V Rasskazov, and E V Saranina, Geochemical evolution of Middle—Late Cenozoic magmatism in the northern part of the Rio Grande Rift, Western United States: .

Summary

Geochemical studies of the Middle—Late Cenozoic succession of volcanic rocks from the northern part of the Rio Grande Rift were conducted. The initial activation of the rift structure was coeval with voluminous eruptions of lava and pyroclastic material of mainly intermediate and acid compositions in the San Juan volcanic field 35–27 Ma. The composition of the volcanic products after the rifting was dominated by basic and intermediate lavas. It is shown that the basanites and alkali basalts of the territory had geochemical characteristics of sublithospheric slab and above–sl ab sources. The processes of the riftogenic thinning of lithosphere are expressed by geochemical parameters that reflect the interaction between the liquids [...]

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  • Upper Colorado River Basin

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From Source - Mendeley RIS export <br> On - Tue May 10 10:29:53 CDT 2011

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Title Citation Geochemical evolution of Middle—Late Cenozoic magmatism in the northern part of the Rio Grande Rift, Western United States

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