Occurs within organic-rich, reworked loess in low-elevation area. The composition reported here is the average of three samples: UT16, UT92, UT108. 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.
Characterization, identity, distribution, and source of late Cenozoic tephra beds in the Klondike District of the Yukon, Canada
|StationID||Latitude||Longitude||Geologist||DateVisited||Age Info||Volcano||Eruption||Location Description||Text Description||Sample ID||Sample Type 1||Sample Type 2||Final Unit||Material||Coeff||SiO2||TiO2||Al2O3||FeOT||MnO||MgO||CaO||Na2O||K2O||P2O5||Total-majors||REF majors||METH majors||Fe2O3/Fe203T orig||FeO/FeOT orig||Volatiles csv||METH volatiles||Cs||Rb||Ba||Sr||La||Ce||Pr||Nd||Sm||Eu||Gd||Tb||Dy||Ho||Er||Tm||Yb||Lu||Y||Zr||Nb||Hf||Ta||Pb||Th||U||Sc||V||Cr||Fe||Co||Ni||Cu||Zn||Ga||Mo||As||Na||K||Ref trace1||METH trace1||Rb||Ba||Sr||La||Ce||Nd||Sm||Eu||Gd||Dy||Er||Yb||Lu||Y||Zr||Nb||Pb||Th||U||Sc||Ti||V||Cr||Ni||Cu||Zn||Ga||Ref trace2||METH trace2||Light csv||Halogen csv||other major csv||other lile csv||other ree csv||other hfse csv||other hpe csv||other tm csv||other misc csv|
|Klondike_District_Regional_Tephra||63.9||-139.19998||Preece, 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).||Occurs within organic-rich, reworked loess in low-elevation area. The composition reported here is the average of three samples: UT16, UT92, UT108. 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_Last_Chance_Creek_Te||Tephra Fall||Cumulate||Glass||76.18||0.24||13.32||1.32||0.05||0.29||1.64||4||2.8||990||EMP||1.32||Cl=0.15; H2O=4.03||EMP||1.35||55||906||19.79||37.84||13.44||2.19||0.65||0.21||0.83||0.14||3.19||0.62||4.39||1.85||1.55||38||990||INAA|
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