AVO Sample Information

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SAMPLE INFO : 94SJP53

Sample ID:	94SJP53
Station ID:	94SJP53
Latitude:	62.43101536
Longitude:	-143.126858
Datum:	NAD83
Date Sampled:	1994-00-00
Sample Type 1:	Lava
Sample Type 2:	Dike
Field Lithology:	Dacite

Text Description:
A 7’ thick vertical dike trending N10°W with good columnar jointing and a 8” thick bake zone where it is in contact with silicic material from Dome A at Site 3. Fine grained, vesicular, hypocrystalline, porphyritic to glomeroporphyritic with a matrix of brown glass, mesostasis, opaque, plagioclase and minor altered patches. Plagioclase phenocrysts (An55) are up to 2.75 mm and commonly have oscillatory zoning, some grains have resorption embayments and are frequently riddled with melt inclusions, and pyroxene or opaque inclusions. Orthopyroxene phenocrysts are up to 2.75 mm, intensely pleochroic, and often contain opaque inclusions and occasionally have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.1 mm and occasionally have orthopyroxene cores. Opaque phenocrysts are up to 0.4 mm.

References:

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

GEOCHEM DATA

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
94SJP53	62.43101536	-143.126858	Preece, S. J.	1994-00-00		Skookum Creek		Nabesna B-5; T8N, R12E, S35	A 7’ thick vertical dike trending N10°W with good columnar jointing and a 8” thick bake zone where it is in contact with silicic material from Dome A at Site 3. Fine grained, vesicular, hypocrystalline, porphyritic to glomeroporphyritic with a matrix of brown glass, mesostasis, opaque, plagioclase and minor altered patches. Plagioclase phenocrysts (An55) are up to 2.75 mm and commonly have oscillatory zoning, some grains have resorption embayments and are frequently riddled with melt inclusions, and pyroxene or opaque inclusions. Orthopyroxene phenocrysts are up to 2.75 mm, intensely pleochroic, and often contain opaque inclusions and occasionally have clinopyroxene rims. Clinopyroxene phenocrysts are up to 1.1 mm and occasionally have orthopyroxene cores. Opaque phenocrysts are up to 0.4 mm.	94SJP53	Lava			Whole-rock	63.09	0.95	16.75	4.82	0.13	1.94	4.32	4.39	2.04	0.23	100.9	55	DCP	5.38	4.82	LOI=1.33	DCP		31	614	422															23	204	6.4				4.2	3.3	12	96	5			7	16	68	17.8					55	XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cr, Cu, Zn;

SAMPLE LOCATION

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