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Text Description: A 7’ thick vertical dike trending N10°W with good columnar jointing and a 8” thick bake zone where it is in contact with silicic material from Dome A at Site 3. Fine grained, vesicular, hypocrystalline, porphyritic to glomeroporphyritic with a matrix of brown glass, mesostasis, opaque, plagioclase and minor altered patches. Plagioclase phenocrysts (An55) are up to 2.75 mm and commonly have oscillatory zoning, some grains have resorption embayments and are frequently riddled with melt inclusions, and pyroxene or opaque inclusions. Orthopyroxene phenocrysts are up to 2.75 mm, intensely pleochroic, and often contain opaque inclusions and occasionally have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.1 mm and occasionally have orthopyroxene cores. Opaque phenocrysts are up to 0.4 mm. 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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94SJP53 | 62.43101536 | -143.126858 | Preece, S. J. | 1994-00-00 | Skookum Creek | Nabesna B-5; T8N, R12E, S35 | A 7’ thick vertical dike trending N10°W with good columnar jointing and a 8” thick bake zone where it is in contact with silicic material from Dome A at Site 3. Fine grained, vesicular, hypocrystalline, porphyritic to glomeroporphyritic with a matrix of brown glass, mesostasis, opaque, plagioclase and minor altered patches. Plagioclase phenocrysts (An55) are up to 2.75 mm and commonly have oscillatory zoning, some grains have resorption embayments and are frequently riddled with melt inclusions, and pyroxene or opaque inclusions. Orthopyroxene phenocrysts are up to 2.75 mm, intensely pleochroic, and often contain opaque inclusions and occasionally have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.1 mm and occasionally have orthopyroxene cores. Opaque phenocrysts are up to 0.4 mm. | 94SJP53 | Lava | Whole-rock | 63.09 | 0.95 | 16.75 | 4.82 | 0.13 | 1.94 | 4.32 | 4.39 | 2.04 | 0.23 | 100.9 | 55 | DCP | 5.38 | 4.82 | LOI=1.33 | DCP | 31 | 614 | 422 | 23 | 204 | 6.4 | 4.2 | 3.3 | 12 | 96 | 5 | 7 | 16 | 68 | 17.8 | 55 | XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn; |
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