AVO Logo
Site Map | FAQ |
Alaska Volcano Observatory
 
You are here: Home > Samples > Preece_2000_Klondike_District_Quartz_Creek_Tephra

SAMPLE INFO : Preece_2000_Klondike_District_Quartz_Creek_Tephra
Sample ID:Preece_2000_Klondike_District_Quartz_Creek_Tephra
Station ID:Klondike_District_Regional_Tephra
Latitude:63.9
Longitude:-139.19998
Datum:NAD83
Sample Type 1:Tephra Fall
Text Description:
Interstratified with sands and silts in the upper part of the White Channel gravels. In places, this tephra bed drapes into ice-wedge casts or is cut by them. The composition reported here is the average of two samples: UT1001, UT1053. Type II beds have more crystals than type I beds, and the glass is mainly in the form of highly inflated pumice. Feldspar, orthopyroxene, and green amphibole are common with minor or trace amounts of red amphibole, clinopyroxene, iron-titanium oxides, apatite, and zircon.

References:
Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada

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
Klondike_District_Regional_Tephra63.9-139.19998Preece, S. J. Tephra preserved in the late Cenozoic deposits of the Klondike region, Yukon Territory. Preece et al. (2000) identify 12 regional beds from 41 individual tephra samples; Sandhu et al. (2001) and Westgate et al. (2001) provide additional data on tephra bed average glass compositions from the area. Preece et al. (2011) provide information and data on 50 distinctive tephra beds in the area. Glass geochemical data of samples here are averages calculated from analyses of multiple tephra correlated across different stratigraphic locations in the Klondike area. Individual sample IDs are noted in the sample descriptions. Note that tephra units only located in one stratigraphic section are not included here and are listed by individual sample ID (see Preece et al. 2000, footnotes of tables 2 and 3; Sandhu et al. 2001, footnote of table 1; Westgate et al. 2001 footnote of table 2; Preece et al. 2011, Tables 1 and 4).Interstratified with sands and silts in the upper part of the White Channel gravels. In places, this tephra bed drapes into ice-wedge casts or is cut by them. The composition reported here is the average of two samples: UT1001, UT1053. Type II beds have more crystals than type I beds, and the glass is mainly in the form of highly inflated pumice. Feldspar, orthopyroxene, and green amphibole are common with minor or trace amounts of red amphibole, clinopyroxene, iron-titanium oxides, apatite, and zircon.Preece_2000_Klondike_District_Quartz_Creek_TephraTephra FallCumulateGlass 78.01 0.16 12.47 0.83 0.03 0.17 0.93 3.58 3.79 990EMP0.83Cl=0.04; H2O=5.09EMP 1.79 73 937 19.5 38.8 14.1 2.02 0.43 0.23 0.93 0.15 3.79 0.47 8.14 2.56 1.93 28 990INAA

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.