|
Text Description: Approximately 10' thick flow. Lowest flow in the bottom andesite package at Site 1 in the Boyden Hills. Fine grained, vesicular, diktytaxitic, hypocrystalline, seriate to glomeroporphyritic with a matrix of brown glass, opaque, plagioclase, clinopyroxene and alteration. Plagioclase phenocrysts (An38-An63) are up to 1.75 mm and commonly have sieve textured cores, overgrowth rims, and normal zoning; occasionally have oscillatory zoning and may be strongly resorbed with irregular shape. Clinopyroxene phenocrysts are up 2.2 mm and occasionally have orthopyroxene cores. Olivine phenocrysts are up to 1.0 mm and occasionally have minor alteration along the rim. Orthopyroxene phenocrysts are up to 1.4 mm and display clinopyroxene rims. 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 | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
93SJP48 | 62.48046273 | -143.0701958 | Preece, S. J. | 1993-00-00 | Skookum Creek | Nabesna B-5, T8N, R13E, S18 | Approximately 10' thick flow. Lowest flow in the bottom andesite package at Site 1 in the Boyden Hills. Fine grained, vesicular, diktytaxitic, hypocrystalline, seriate to glomeroporphyritic with a matrix of brown glass, opaque, plagioclase, clinopyroxene and alteration. Plagioclase phenocrysts (An38-An63) are up to 1.75 mm and commonly have sieve textured cores, overgrowth rims, and normal zoning; occasionally have oscillatory zoning and may be strongly resorbed with irregular shape. Clinopyroxene phenocrysts are up 2.2 mm and occasionally have orthopyroxene cores. Olivine phenocrysts are up to 1.0 mm and occasionally have minor alteration along the rim. Orthopyroxene phenocrysts are up to 1.4 mm and display clinopyroxene rims. | 93SJP48 | Lava | Whole-rock | 55.6 | 0.95 | 17.23 | 6.4 | 0.12 | 5.26 | 8.73 | 3.42 | 1.38 | 0.07 | 99.79 | 55 | DCP | 7.05 | 6.4 | LOI=0.82 | DCP | 23.1 | 444 | 640 | 19 | 118 | 3.7 | 3.1 | 1.4 | 23.1 | 189 | 127 | 68 | 80 | 64 | 18.2 | 55 | XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn; |
This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137
Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.