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SAMPLE INFO : 96-ARh-7
Sample ID:96-ARh-7
Station ID:96-ARh-7
Latitude:54.1184
Longitude:-165.66268
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-ARh-754.1184-165.66268Richter, D. H.1996-00-00 1550000 ± 40000 40Ar/39Ar; 14991; 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-ARh-7LavaaauWhole-rock 51.5 1 17.12 8.86 0.174 6.51 10.15 3.19 1.19 0.291 924XRF8.86 1.423040251 23.46861323 452.9156587 527.2120081 14.35055461 32.39445865 4.674470126 20.46410744 5.190484128 1.478015188 4.937093384 0.780169948 4.824512188 0.967862284 2.618215739 0.375000534 2.379920396 0.364991739 24.14532955 117.7446425 3.791339065 3.416202323 0.260044185 6.332983735 3.360725784 1.506331171 28.43139361 236 174 52 75 76 19 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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