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Text Description: Block from the upper part of the carapace of Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz, opaque and alteration. Plagioclase phenocrysts (An31 - An45) are up to 2.95 mm and tend to be rounded, frequently have strong oscillatory zoning and some mica alteration is present. Opaque phenocrysts are up to 0.45 mm. There is an altered phase that now consists of opaque rim with granular core of an unidentifiable high relief mineral ± feldspar. A second altered phase, larger in size, is now serpentine/chlorite. 82.0% matrix, 14.7% plagioclase, 0.2% opaque, 0.6% altered phase, 0.2% alteration, 2.3% vesicles. 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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93SJP55 | 62.41434749 | -143.1601895 | Preece, S. J. | 1993-00-00 | Skookum Creek | Nabesna B-5; T7N, R12E, S3 | Block from the upper part of the carapace of Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz, opaque and alteration. Plagioclase phenocrysts (An31 - An45) are up to 2.95 mm and tend to be rounded, frequently have strong oscillatory zoning and some mica alteration is present. Opaque phenocrysts are up to 0.45 mm. There is an altered phase that now consists of opaque rim with granular core of an unidentifiable high relief mineral ± feldspar. A second altered phase, larger in size, is now serpentine/chlorite. 82.0% matrix, 14.7% plagioclase, 0.2% opaque, 0.6% altered phase, 0.2% alteration, 2.3% vesicles. | 93SJP55 | Lava | Whole-rock | 70.58 | 0.35 | 15.6 | 2.34 | 0.08 | 0.59 | 2.27 | 4.95 | 2.34 | 0.14 | 99.1 | 55 | DCP | 2.57 | 2.34 | LOI=0.78 | DCP | 42 | 756 | 292 | 16 | 178 | 6.8 | 3.6 | 1.6 | 3.8 | 14 | bdl | 1 | 4 | 62 | 16.3 | 55 | XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn; |
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