AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
You are here: Home > Samples > 94SJP50B

Sample ID:94SJP50B
Station ID:94SJP50B
Date Sampled:1994-00-00
Sample Type 1:Lava
Sample Type 2:Dike
Field Lithology:Andesite
Text Description:
Dike cutting through 94SJP50A. The dike is 5 thick, trending N90E, and is columnar jointed. Fine-grained, vesicular, holocrystalline, weakly pilotaxitic, porphyritic with a matrix of mesostasis, opaque, plagioclase and red alteration. Plagioclase phenocrysts (An42 - An58) have two populations 3.5-0.15 mm with some sieve textured cores or intermediate zones, and complex zoning; and 0.15-0.05 mm needles. Orthopyroxene phenocrysts are 1.0-0.1 mm,. Clinopyroxene phenocrysts are 0.7-0.1 mm and twinning is common.

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

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
94SJP50B62.41629204-143.1010239Preece, S. J.1994-00-00 Skookum CreekNabesna B-5; T7N, R12E, S194SJP50BLavaWhole-rock 57.9 1.22 17.19 7.01 0.17 2.78 6.73 4.25 1.13 0.19 100.0555DCP7.747.01LOI=1.43DCP 21.7 477 513 26 159 4.8 2.1 1.2 21 163 17 18 44 74 18.2 55XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;


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 G22AC00137

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