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SAMPLE INFO : 93SJP39
Sample ID:93SJP39
Station ID:93SJP39
Latitude:62.445
Longitude:-143.1246
Datum:NAD83
Date Sampled:1993-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Dacite
Text Description:
Highly fractured outcrop with flow folding in the silicic material near the base of Site 5. Fine-grained, hypocrystalline, porphyritic with a matrix of glass, feldspar and opaque. Plagioclase phenocrysts (An31 - An58) are up to 2.5 mm and some have sieve texture throughout or in zones; there is strong oscillatory zoning, resorbed rims, overgrowth rims on resorbed grains, and amphibole or opaque inclusions. Amphibole phenocrysts are 2.4 -0.1 mm with yellow green-green pleochroism, and some have resorbed rims and/or opaque inclusions. Orthopyroxene phenocrysts are up to 0.5 mm and some have opaque inclusions. Opaque phenocrysts are up to 0.35 mm. Zircon phenocrysts are up to 0.1 mm. 70.5% matrix, 25.4% plagioclase, 0.9% orthopyroxene, 0.9% opaque, 2.3% amphibole.

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
93SJP3962.445-143.1246Preece, S. J.1993-00-00 Skookum CreekNabesna B-5; T8N, R12E, S26Highly fractured outcrop with flow folding in the silicic material near the base of Site 5. Fine-grained, hypocrystalline, porphyritic with a matrix of glass, feldspar and opaque. Plagioclase phenocrysts (An31 - An58) are up to 2.5 mm and some have sieve texture throughout or in zones; there is strong oscillatory zoning, resorbed rims, overgrowth rims on resorbed grains, and amphibole or opaque inclusions. Amphibole phenocrysts are 2.4 -0.1 mm with yellow green-green pleochroism, and some have resorbed rims and/or opaque inclusions. Orthopyroxene phenocrysts are up to 0.5 mm and some have opaque inclusions. Opaque phenocrysts are up to 0.35 mm. Zircon phenocrysts are up to 0.1 mm. 70.5% matrix, 25.4% plagioclase, 0.9% orthopyroxene, 0.9% opaque, 2.3% amphibole.93SJP39LavaWhole-rock 68.84 0.51 16.09 2.9 0.11 0.76 3.24 4.9 2.19 0.15 100.0755DCP3.212.9LOI=0.31DCP 40 727 427 16 174 6.8 3.5 1.6 5.8 40 1 3 9 51 16.5 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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