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Sample: 93SJP93

Sample ID: 93SJP93 [1]
Station ID: 93SJP93
AT Num:
Volcano: Skookum Creek
Possible source:
Eruption:
Collector: Preece, S. J.
Date sampled: 1993-00-00
Sample type 1: Lava
Color:
Final unit:
Text Description: Dike intruding into silicic material (93SJP15-18, Dome C) along Fossil Creek. Fine-grained, porphyritic to glomeroporphyritic, altered, holocrystalline with a matrix of alteration, opaque, feldspar, clinopyroxene, and cryptocrystalline material. Plagioclase phenocrysts (An26-An33) have two populations 2.5-0.1 mm displaying sieve textured zones, complex zoning, resorption embayments; and 0.1 - 0.25 mm that are needle-like. Orthopyroxene phenocrysts are 1.25-0.45 mm. Clinopyroxene phenocrysts are 0.7-0.35 mm and some are twinned. Olivine? phenocrysts are completely altered but have an olivine-like habit.
Sample Location:

References Cited

[1] Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex, 1997

Preece, S. J., 1997, Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex: Miami University (Ohio) unpublished Ph.D. dissertation, 547 p.