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SAMPLE INFO : 96-ARh-24A
Sample ID:96-ARh-24A
Station ID:96-ARh-24A
Latitude:54.1124
Longitude:-166.03808
Datum:NAD83
Date Sampled:1996-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Basalt
Final Unit:byf
Text Description:
Qfl - Flat Top lava flows. Thin (2 m) to medium (6 m) (at distal ends) lava flows exhibiting conspicuous reddish, oxidized scoriaceous tops and bottoms. Rocks are medium gray to medium dark gray porphyritic basalts (50.3 - 51.3% SiO2) containing phenocrysts of plagioclase (10-20%, 3 mm), olivine (2-6%, 1-2 mm), and clinopyroxene (trace=3%, 0.5-1 mm) in an intergranular groundmass. Whole rock 40Ar/39Ar mean age of basalt is 0.25 +/- 0.04 Ma. Unit as mapped may include flows from both present Akutan Volcano and ancestral Akutan.

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-24A54.1124-166.03808Richter, D. H.1996-00-00 250000 ± 40000 40Ar/39Ar; 924; date of the unitAkutanlat/long estimated from paper mapQfl - Flat Top lava flows. Thin (2 m) to medium (6 m) (at distal ends) lava flows exhibiting conspicuous reddish, oxidized scoriaceous tops and bottoms. Rocks are medium gray to medium dark gray porphyritic basalts (50.3 - 51.3% SiO2) containing phenocrysts of plagioclase (10-20%, 3 mm), olivine (2-6%, 1-2 mm), and clinopyroxene (trace=3%, 0.5-1 mm) in an intergranular groundmass. Whole rock 40Ar/39Ar mean age of basalt is 0.25 +/- 0.04 Ma. Unit as mapped may include flows from both present Akutan Volcano and ancestral Akutan.96-ARh-24ALavabyfWhole-rock 51.33 1.121 20.78 8.76 0.179 3.41 9.45 3.93 0.84 0.195 924XRF8.76 0.666490163 12.05287624 300.1150148 429.4618158 8.108395964 19.3301742 2.899786227 13.61045226 4.100981205 1.345851801 4.609654824 0.767897661 4.965928374 1.03561488 2.847620741 0.416608214 2.583080694 0.410449029 25.93169617 84.76064262 1.940439003 2.578771986 0.137665985 4.826243489 1.544959124 0.717764459 24.40974727 244 10 0 83 77 23 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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