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Text Description: Blocky andesite flow. Outcrop is spire-like with 1 -2’ diameter blocks in a finer matrix of ash or altered andesite at Site 15. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque and plagioclase. Plagioclase phenocrysts (An39 - An60) are up to 3.55 mm and commonly have sieve textured zones, oscillatory zoning, and resorption embayments. Orthopyroxene phenocrysts are up to 1.2 mm. Clinopyroxene phenocrysts are up to 2.62 mm. Opaque phenocrysts are up to 0.4 mm. Trachyandesite. References: ![]() |
StationID | Latitude | Longitude | Geologist | DateVisited | Age Info | Volcano | Eruption | Location Description | Text Description | Sample ID | Sample Type 1 | Sample Type 2 | Final Unit | Material | 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 | |
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94SJP123 | 62.25515631 | -143.4665763 | Preece, S. J. | 1994-00-00 | Skookum Creek | Nabesna A-5; T5N, R10E, S1 | Blocky andesite flow. Outcrop is spire-like with 1 -2’ diameter blocks in a finer matrix of ash or altered andesite at Site 15. Fine grained, vesicular, holocrystalline, seriate porphyritic with a matrix of mesostasis, opaque and plagioclase. Plagioclase phenocrysts (An39 - An60) are up to 3.55 mm and commonly have sieve textured zones, oscillatory zoning, and resorption embayments. Orthopyroxene phenocrysts are up to 1.2 mm. Clinopyroxene phenocrysts are up to 2.62 mm. Opaque phenocrysts are up to 0.4 mm. Trachyandesite. | 94SJP123 | Lava | Whole-rock | 58.89 | 1.19 | 17.22 | 7.44 | 0.13 | 2.87 | 5.47 | 4.63 | 1.85 | 0.36 | 99.71 | 55 | DCP | 8.18 | 7.44 | LOI=-0.07 | DCP | 37 | 460 | 516 | 32 | 286 | 8.6 | 6.5 | 2.6 | 12.9 | 128 | 4 | 8 | 32 | 70 | 19.4 | 55 | XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn; |
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