AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > 94SJP50A

SAMPLE INFO : 94SJP50A
Sample ID:94SJP50A
Station ID:94SJP50A
Latitude:62.41629204
Longitude:-143.1010239
Datum:NAD83
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Flow
Field Lithology:Andesite
Text Description:
Flows with thick rubble zones and thin massive zones. The package is a couple of hundred feet thick and overlies silicic material in Finger Creek. The sample is from the top flow and is cut by a dike (94SJP50B). Fine-grained, holocrystalline, weakly pilotaxitic, intersertal, locally intergranular, seriate porphyritic with a matrix of mesostasis, opaque, feldspar, clinopyroxene, orthopyroxene, yellowish altered patches, and calcite alteration. Plagioclase phenocrysts (An26-An55) are up to 1.1 mm, display complex zoning, and a few grains have sieve textured intermediate zones. Orthopyroxene phenocrysts are up to 0.6 mm and have clinopyroxene rims. Clinopyroxene phenocrysts are up to 0.35 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
94SJP50A62.41629204-143.1010239Preece, S. J.1994-00-00 Skookum CreekNabesna B-5, T7N, R12E, S1Flows with thick rubble zones and thin massive zones. The package is a couple of hundred feet thick and overlies silicic material in Finger Creek. The sample is from the top flow and is cut by a dike (94SJP50B). Fine-grained, holocrystalline, weakly pilotaxitic, intersertal, locally intergranular, seriate porphyritic with a matrix of mesostasis, opaque, feldspar, clinopyroxene, orthopyroxene, yellowish altered patches, and calcite alteration. Plagioclase phenocrysts (An26-An55) are up to 1.1 mm, display complex zoning, and a few grains have sieve textured intermediate zones. Orthopyroxene phenocrysts are up to 0.6 mm and have clinopyroxene rims. Clinopyroxene phenocrysts are up to 0.35 mm.94SJP50ALavaWhole-rock 56.81 0.8 18.58 5.7 0.18 3.93 7.85 3.7 1.5 0.12 99.0455DCP6.225.7LOI=0.85DCP 24.7 525 717 18 106 3.6 4.8 1.6 21.3 186 28 39 64 61 19.2 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA
URL: www.avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

twitter @alaska_avo
facebook alaska.avo
email Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G19AC00060 and G19AC00171.

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.