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U-series Disequilibria in Guatemalan Lavas, Crustal Contamination, and Implications for Magma Genesis Along the Central American Subduction Zone

Walker, James A.; Mickelson, J. Erik; Thomas, Rebecca B.; Patino, Lina C.; Cameron, Barry; Carr, Michael J.; Feigenson, Mark D.; Edwards, R. Lawrence (American Geophysical Union, 2007)

New U-series results indicate that Guatemalan volcanic rocks display both 238U and 230Th excesses. 230Th excess is restricted to volcanoes in central Guatemala, both along and behind the front. 230Th excess correlates ...