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Text Description: Approximately 15-20’ thick dike that outcrops as rubbly plates and cuts up vertically through silicic material from Dome A as well as flows of unit nA1 at Site 3. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and minor alteration. Plagioclase phenocrysts (An28 - An47, An67) are up to 3.25 mm and are frequently rounded; some have oscillatory zoning; some have patchy, resorbed cores with complex overgrowth rims or resorption embayments. Amphibole phenocrysts are up to 0.5 mm with green-yellow pleochroism. Orthopyroxene phenocrysts are up to 0.5 mm with reddish oxidation? along rims. Opaque phenocrysts up to 0.35 mm. One clinopyroxene phenocrysts, 0.8 mm, was observed. 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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94SJP39 | 62.427404 | -143.1238023 | Preece, S. J. | 1994-00-00 | Skookum Creek | Nabesna B-5; T8N, R12E, S35 | Approximately 15-20’ thick dike that outcrops as rubbly plates and cuts up vertically through silicic material from Dome A as well as flows of unit nA1 at Site 3. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and minor alteration. Plagioclase phenocrysts (An28 - An47, An67) are up to 3.25 mm and are frequently rounded; some have oscillatory zoning; some have patchy, resorbed cores with complex overgrowth rims or resorption embayments. Amphibole phenocrysts are up to 0.5 mm with green-yellow pleochroism. Orthopyroxene phenocrysts are up to 0.5 mm with reddish oxidation? along rims. Opaque phenocrysts up to 0.35 mm. One clinopyroxene phenocrysts, 0.8 mm, was observed. | 94SJP39 | Lava | Whole-rock | 67.39 | 0.54 | 16.4 | 3.45 | 0.11 | 0.73 | 3.32 | 4.94 | 2.11 | 0.24 | 100.29 | 55 | DCP | 3.83 | 3.45 | LOI=0.74 | DCP | 39 | 727 | 390 | 21 | 229 | 7.5 | 5.6 | 1.4 | 8.3 | 83 | 2 | 5 | 13 | 63 | 17.5 | 55 | XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn; |
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