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SAMPLE INFO : 74-AMm-86
Sample ID:74-AMm-86
Station ID:74-AMm-86
Latitude:62.0534
Longitude:-144.5059
Datum:NAD83
Date Sampled:1974-00-00
Sample Type 1:Lava
Field Lithology:Dacite
Sample Unit:Qedd
Text Description:
Early Dacite Domes and Associated Flows. Three hornblende dacite domes (1, 2, 3) on east flank of Mount Drum were apparently erupted early in dome-building stage of second cycle of volcanic activity and may represent a distinct phase of second cycle associated with cone-building two-pyroxene andesite and dacite flows (Qzaf). All domes have been dissected by erosion, and dome 1, an extensive dome-flow complex with a surface area greater than 10 sq km, is overlain by widespread deposits of glacial drift (Qog).

References:
Geologic map of the Gulkana A-2 quadrangle, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedVolcanoEruptionLocation DescriptionText DescriptionSample IDMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-majorsREF majorsMETH majorsFe2O3/Fe203T origFeO/FeOT origVolatiles csvMETH volatilesCsRbBaSrLaCePrNdSmEuGdTbDyHoErTmYbLuYZrNbHfTaPbThUScVCrFeCoNiCuZnGaMoAsNaKRef trace1METH trace1RbBaSrLaCeNdSmEuGdDyErYbLuYZrNbPbThUScTiVCrNiCuZnGaRef trace2METH trace2Light csvHalogen csvother major csvother lile csvother ree csvother hfse csvother hpe csvother tm csvother misc csv
74-AMm-8662.0534-144.5059Miller, T. P.1974-00-00DrumWrangell Volcanic Field, Gulkana A-2 quadrangle. Lat and long derived from paper map.Early Dacite Domes and Associated Flows. Three hornblende dacite domes (1, 2, 3) on east flank of Mount Drum were apparently erupted early in dome-building stage of second cycle of volcanic activity and may represent a distinct phase of second cycle associated with cone-building two-pyroxene andesite and dacite flows (Qzaf). All domes have been dissected by erosion, and dome 1, an extensive dome-flow complex with a surface area greater than 10 sq km, is overlain by widespread deposits of glacial drift (Qog). 74-AMm-86Whole Rock 64.34 0.49 17.54 3.68 0.08 2.25 5.17 4.35 1.51 0.19 100.155DCP4.083.68LOI=0.4DCP 684 9 21 35 58 55MX 508 72 8.9 70 16 55DCP: Ba, Sc, V; XRF: Zr, Ni; K V=12579, M=XRF-EDS, R=159;Rb V=40, M=XRF-EDS, R=159;Sr V=687, M=XRF-EDS, R=159;Ba V=474, M=XRF-EDS, R=159;Y V=10, M=XRF-EDS, R=159;Zr V=84, M=XRF-EDS, R=159;Nb V=<10, M=XRF-EDS, R=159;Cu V=35, M=XRF-EDS, R=159;Cr V=15, M=XRF-EDS, R=159;Ni V=26, M=XRF-EDS, R=159;Zn V=46, M=XRF-EDS, R=159;
74-AMm-8662.0534-144.5059Miller, T. P.1974-00-00DrumWrangell Volcanic Field, Gulkana A-2 quadrangle. Lat and long derived from paper map.Early Dacite Domes and Associated Flows. Three hornblende dacite domes (1, 2, 3) on east flank of Mount Drum were apparently erupted early in dome-building stage of second cycle of volcanic activity and may represent a distinct phase of second cycle associated with cone-building two-pyroxene andesite and dacite flows (Qzaf). All domes have been dissected by erosion, and dome 1, an extensive dome-flow complex with a surface area greater than 10 sq km, is overlain by widespread deposits of glacial drift (Qog). 74-AMm-86Whole Rock 64.96 0.59 17.17 0.07 2.32 4.95 4.44 1.52 0.14 99.78159RAPIDA1.622.22H2OP=0.75; H2OM=0.03; CO2=0.01RAPIDAK V=12579, M=XRF-EDS, R=159;Rb V=40, M=XRF-EDS, R=159;Sr V=687, M=XRF-EDS, R=159;Ba V=474, M=XRF-EDS, R=159;Y V=10, M=XRF-EDS, R=159;Zr V=84, M=XRF-EDS, R=159;Nb V=<10, M=XRF-EDS, R=159;Cu V=35, M=XRF-EDS, R=159;Cr V=15, M=XRF-EDS, R=159;Ni V=26, M=XRF-EDS, R=159;Zn V=46, M=XRF-EDS, R=159;
74-AMm-8662.0534-144.5059Miller, T. P.1974-00-00DrumWrangell Volcanic Field, Gulkana A-2 quadrangle. Lat and long derived from paper map.Early Dacite Domes and Associated Flows. Three hornblende dacite domes (1, 2, 3) on east flank of Mount Drum were apparently erupted early in dome-building stage of second cycle of volcanic activity and may represent a distinct phase of second cycle associated with cone-building two-pyroxene andesite and dacite flows (Qzaf). All domes have been dissected by erosion, and dome 1, an extensive dome-flow complex with a surface area greater than 10 sq km, is overlain by widespread deposits of glacial drift (Qog). 74-AMm-86Whole Rock 64.4 0.58 17 3.6 0.07 2.3 4.9 4.4 1.5 0.14 1002665RAPIDA1.62.2H2OP=0.75; H2OM=0.03; CO2=0.01RAPIDAK V=12579, M=XRF-EDS, R=159;Rb V=40, M=XRF-EDS, R=159;Sr V=687, M=XRF-EDS, R=159;Ba V=474, M=XRF-EDS, R=159;Y V=10, M=XRF-EDS, R=159;Zr V=84, M=XRF-EDS, R=159;Nb V=<10, M=XRF-EDS, R=159;Cu V=35, M=XRF-EDS, R=159;Cr V=15, M=XRF-EDS, R=159;Ni V=26, M=XRF-EDS, R=159;Zn V=46, M=XRF-EDS, R=159;

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