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SAMPLE INFO : 93SJP12
Sample ID:93SJP12
Station ID:93SJP12
Latitude:62.41518077
Longitude:-143.0818574
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Andesite
Text Description:
Approximately 5-10 thick bifurcating dike trending N85W and cutting silicic material from Dome C at Site 7 . Fine-grained, vesicular, hypocrystalline, intersertal, intergranular, porphyritic to glomeroporphyritic with a matrix of brown glass, plagioclase (An33 - An57), clinopyroxene and opaque. Many vesicles have dark brown, glassy rinds with plagioclase needles. A few vesicles are lined with yellowish alteration. Plagioclase phenocrysts (An30 - An54) have two populations: 3.7-0.2 mm and all large grains have sieve textured cores with thin overgrowth rims that are oscillatory zoned, and a few have poikilitic orthopyroxene; 0.2-0.05 mm, thin euhedral to subhedral laths, some with undulatory extinction. Orthopyroxene phenocrysts are 1.1-0.2 mm, and a few have thin clinopyroxene rims or sieve to spongy textured zones. Clinopyroxene phenocrysts are up to 1.05 mm and are frequently twinned; grains 0.1 - 0.05 mm in length are needle-like. Opaque phenocrysts are up to 0.08 mm.

References:
Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex

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
93SJP1262.41518077-143.0818574Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T7N, R13E, S693SJP12LavaWhole-rock 57.38 1.19 17.34 6.71 0.13 3.8 7.05 4.3 1.09 0.29 100.4655DCP7.436.71LOI=0.68DCP 20.4 450 523 23 159 5.9 2.6 1.2 20.4 170 34 21 40 72 18.6 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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