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SAMPLE INFO : 96-Mc-5
Sample ID:96-Mc-5
Station ID:96-Mc-5
Latitude:54.1695
Longitude:-165.78558
Datum:NAD83
Date Sampled:1996-00-00
Sample Type 1:Lava
Sample Type 2:Dome
Final Unit:aau
 Text Description:
QTd - Extrusive rocks (Pleistocene and Pliocene). Domes or massive flows generally associated with small subaqueous cinder cones (QTc). Rocks exhibit spectacular columnar joints. They are greenish black to medium gray, porphyritic basalts (50.3-51.6% SiO2) containing phenocrysts of plagioclase (5-15%, 3-4 mm), clinopyroxene (1-10% 2-3 mm), and olivine (trace-3%, 1-2 mm) in a pilotaxitic groundmass. Whole rock 40Ar/39Ar mean age of the basalt is 1.55+/-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-Mc-554.1695-165.78558McGimsey, R. G.1996-00-00 Akutanlat/long estimated from paper mapQTd - Extrusive rocks (Pleistocene and Pliocene). Domes or massive flows generally associated with small subaqueous cinder cones (QTc). Rocks exhibit spectacular columnar joints. They are greenish black to medium gray, porphyritic basalts (50.3-51.6% SiO2) containing phenocrysts of plagioclase (5-15%, 3-4 mm), clinopyroxene (1-10% 2-3 mm), and olivine (trace-3%, 1-2 mm) in a pilotaxitic groundmass. Whole rock 40Ar/39Ar mean age of the basalt is 1.55+/-0.04 Ma.96-Mc-5LavaaauWhole-rock 50.28 0.94 18.47 8.95 0.164 5.75 11.58 2.82 0.89 0.161 924XRF8.95 0.645334312 17.71626785 266.7009493 452.1025164 7.733646315 17.92113784 2.631197694 12.08861039 3.424562206 1.054850033 3.698089562 0.6337349 4.023622232 0.859330867 2.358716845 0.333335363 2.121684921 0.331727364 21.18619949 81.12581128 1.779440965 2.494509453 0.134672898 5.888379267 2.351816816 1.135901091 34.06770405 272 72 23 125 69 18 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, Ni, Cu, Zn, Ga;

SAMPLE LOCATION

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