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SAMPLE INFO : 96-ARh-38C
Sample ID:96-ARh-38C
Station ID:96-ARh-38
Latitude:54.1948
Longitude:-165.95498
Datum:NAD83
Date Sampled:1996-00-00
Sample Type 1:Other
Final Unit:aau
Text Description:
Qaa - volcanic rocks of ancestral Akutan volcano (Pleistocene). Lava flows and minor volcaniclastic rocks, undifferentiated. Chiefly medium (3-4 m thick) to thick (>5 m) flows interlayered with minor lahars and airfall lapilli tuffs, especially at higher elevations. Flows are medium to dark gray and range from fine-grained aphanitic to highly porphyritic. Porphyritic varieties are basalts and basaltic andesites containing phenocrysts of plagioclase (10-40%, 1-5 mm), olivine (1-8%, 2-3 mm), and clinopyroxene (0-20%, 2-3 mm) in intersertal to intergranular groundmasses. Whole rock 40Ar/39Ar mean age of basalt is 1.41 +/- 0.04 Ma.

References:
Geologic map of Akutan Island, Alaska
The eruptive history, magmatic evolution, and influence of glacial ice at long-lived Akutan volcano, eastern Aleutian Islands, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
96-ARh-3854.1948-165.95498Richter, D. H.1996-00-00 1410000 ± 40000 40Ar/39Ar; 924; date of the unitAkutanlat/long estimated from paper mapQaa - volcanic rocks of ancestral Akutan volcano (Pleistocene). Lava flows and minor volcaniclastic rocks, undifferentiated. Chiefly medium (3-4 m thick) to thick (>5 m) flows interlayered with minor lahars and airfall lapilli tuffs, especially at higher elevations. Flows are medium to dark gray and range from fine-grained aphanitic to highly porphyritic. Porphyritic varieties are basalts and basaltic andesites containing phenocrysts of plagioclase (10-40%, 1-5 mm), olivine (1-8%, 2-3 mm), and clinopyroxene (0-20%, 2-3 mm) in intersertal to intergranular groundmasses. Whole rock 40Ar/39Ar mean age of basalt is 1.41 +/- 0.04 Ma.96-ARh-38COtherQuenched InclusionaauWhole-rock 50.46 1.205 19.03 10.31 0.202 4.74 9.42 3.51 0.85 0.278 924XRF10.31 0.838773036 14.0640646 460.0408298 523.7896788 12.82273139 29.07554792 4.321459995 19.68197549 5.128220822 1.572674996 4.913280654 0.812017541 5.000462632 1.02066819 2.839352336 0.403416601 2.450602982 0.377355654 24.97953856 110.1162916 3.23545628 3.19439911 0.227528156 3.713721973 2.313104593 0.920446933 21.98085344 290 15 0 38 89 25 924ICPMS: Cs, Rb, Ba, Sr, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y, Zr, Nb, Hf, Ta, Pb, Th, U, Sc; XRF: V, Cr, Cu, Zn, Ga;

SAMPLE LOCATION

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