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

SAMPLE INFO : Schaefer_Tetlin_Tephra_average
Sample ID:Schaefer_Tetlin_Tephra_average
Station ID:96TOK1
Latitude:63.198
Longitude:-142.178
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
The composition reported here is the average of analyses of the light fraction (heavy minerals were removed before microprobe analysis) of three samples: 96TOK1-9, 96TOK1-12, and 96TOK1-13. See individual samples for descriptions.

References:
Stratigraphy, major oxide geochemistry, and 40Ar/39Ar geochronology of a tephra section near Tok, Alaska

GEOCHEM DATA
StationIDLatitudeLongitudeGeologistDateVisitedAge InfoVolcanoEruptionLocation DescriptionText DescriptionSample IDSample Type 1Sample Type 2Final UnitMaterialCoeffSiO2TiO2Al2O3FeOTMnOMgOCaONa2OK2OP2O5Total-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
96TOK163.198-142.178Schaefer, J. R. G.0000-00-00 -625550--Road-cut at mile 1284.6 of the Alaska Highway, southeast of Tok, Alaska. Approximately 17 miles east of Tetlin Junction and 100 miles north of Wrangell volcanic field. Twelve-m-thick section that exposes interbedded sands, silt and tephra that were deposited against a southeasterly sloping, highly weathered intrusive rock. The section is divided into six units based on lithology. Ten tephra samples were taken; however, approximately one m below tephra 96TOK1-9, there are wispy layers of several multiple-banded tephras that were very thin and discontinuous and not detailed in Schaefer (2002). Datum not specified, assumed to be NAD83. The composition reported here is the average of analyses of the light fraction (heavy minerals were removed before microprobe analysis) of three samples: 96TOK1-9, 96TOK1-12, and 96TOK1-13. See individual samples for descriptions.Schaefer_Tetlin_Tephra_averageTephra FallCumulateGlass 75.61 0.23 13.76 0.35 1.58 4.08 3.14 Reported standard deviation of zero. 1003668EMP1.2Cl=0.04EMP

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 G22AC00137

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