Alaska Volcano Observatory - Isotopic and incompatible element constraints on the genesis of island arc volcanics from Cold Bay and Amak Island, Aleutians, and implications for mantle structure

ISOTOPIC AND INCOMPATIBLE ELEMENT CONSTRAINTS ON THE GENESIS OF ISLAND ARC VOLCANICS FROM COLD BAY AND AMAK ISLAND, ALEUTIANS, AND IMPLICATIONS FOR MANTLE STRUCTURE

Morris, J. D., and Hart, S. R., 1983, Isotopic and incompatible element constraints on the genesis of island arc volcanics from Cold Bay and Amak Island, Aleutians, and implications for mantle structure: Geochimica et Cosmochimica Acta, v. 47, n. 11, p. 2015-2030.

DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.

80: Nd and Pb isotopic compositions of Cold Bay/Amak volcanics

* Nd data normalized to 146/144 -0.7219; BCR-1 values -0.512650. Pb data corrected for fractionation using SRM 981; reproducibility of ratios is <.05%/amu. *

81: Alkali, alkali metal and Sr isotope ratios of Cold Bay/Amak andesites

* SiO2 and K contents reported as weight %; Rb, Cs, Sr, and Ba concentrations in ppm. * Normalized to 86/88 = .1194 and adjusted to 0.70800 for E&A standard. *

82: Average* trace element and Sr isotope ratios for Cold Bay/Amak

* *Errors given are 2sigma standard deviation of the mean; ratios averaged as ratios. ** Ba/La is average of Cold Bay 3 and 5, Amak 2, 3, 4, 5; La data from Marsh and Leitz (1979). *

83: LIL element ratio composition of arc lavas and OIB

* *Based on 9 data sets for arcs and 10 for OIB; all other data based on n=14 (arcs) and n=18 (OIB); data from Appendix I. Errors are 2 sigma mean. *

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