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Text Description: Approximately 20' thick flow on the east side of Jaeger Mesa. Fine grained, holocrystalline, porphyritic with a matrix of opaque, plagioclase, microlites, orthopyroxene?, clinopyroxene and cryptocrystalline material. Plagioclase phenocrysts (An42-An61) are up to 3.0 mm, frequently have sieve textured cores and overgrowth rims and occasionally have resorption embayment; both normal and oscillatory zoning are present. Olivine phenocrysts are up to 1.1 and have opaque coronas. Clinopyroxene phenocrysts are up to 4.25 mm. Orthopyroxene phenocrysts are up to 1.3 mm. Mode: 70.8% matrix, 21.7% plagioclase, 4.0% olivine, 1.6% clinopyroxene, 1.9% orthopyroxene. 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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94SJP69 | 62.27044755 | -143.0704606 | Preece, S. J. | 1994-00-00 | Skookum Creek | Nabesna B-5, T6N, R13E, S30 | Approximately 20' thick flow on the east side of Jaeger Mesa. Fine grained, holocrystalline, porphyritic with a matrix of opaque, plagioclase, microlites, orthopyroxene?, clinopyroxene and cryptocrystalline material. Plagioclase phenocrysts (An42-An61) are up to 3.0 mm, frequently have sieve textured cores and overgrowth rims and occasionally have resorption embayment; both normal and oscillatory zoning are present. Olivine phenocrysts are up to 1.1 and have opaque coronas. Clinopyroxene phenocrysts are up to 4.25 mm. Orthopyroxene phenocrysts are up to 1.3 mm. Mode: 70.8% matrix, 21.7% plagioclase, 4.0% olivine, 1.6% clinopyroxene, 1.9% orthopyroxene. | 94SJP69 | Lava | Whole-rock | 57.11 | 0.77 | 18.3 | 5.9 | 0.11 | 5.21 | 7.53 | 3.84 | 1.16 | 0.18 | 98.67 | 55 | DCP | 6.45 | 5.9 | LOI=-0.08 | DCP | 19.4 | 406 | 579 | 15 | 96 | 2.9 | 1.9 | 2 | 18.2 | 148 | 89 | 84 | 51 | 64 | 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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