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SAMPLE INFO : 94SJP74A

Sample ID:	94SJP74A
Station ID:	94SJP74A
Latitude:	62.27183221
Longitude:	-143.3193496
Datum:	NAD83
Date Sampled:	1994-00-00
Sample Type 1:	Lava
Sample Type 2:	Dike
Field Lithology:	Andesite

Text Description:
Approximately 10’ thick, sheety dike, trending N135°E and cutting through 94SJP74B. The dike appears to continue to the top of South Pass. Fine grained, vesicular, hypocrystalline, intergranular, glomeroporphyritic with a matrix of pale brown glass, opaque, orthopyroxene and plagioclase. Plagioclase phenocrysts (An40 - An61) are up to 1.75 mm; the smaller grains are laths with normal zoning; the larger grains have complex oscillatory zoning, resorption embayments and sieve textured zones. Orthopyroxene phenocrysts are up to 1.5 mm and some have clinopyroxene rims, occasional sieve textured zones and/or opaque inclusions. Clinopyroxene phenocrysts are up to 0.9 mm. Olivine phenocrysts are up to 0.65 and are altered. Opaque phenocrysts are up to 0.1 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
94SJP74A	62.27183221	-143.3193496	Preece, S. J.	1994-00-00		Skookum Creek		Nabesna B-5; T6N, R11E, S26	Approximately 10’ thick, sheety dike, trending N135°E and cutting through 94SJP74B. The dike appears to continue to the top of South Pass. Fine grained, vesicular, hypocrystalline, intergranular, glomeroporphyritic with a matrix of pale brown glass, opaque, orthopyroxene and plagioclase. Plagioclase phenocrysts (An40 - An61) are up to 1.75 mm; the smaller grains are laths with normal zoning; the larger grains have complex oscillatory zoning, resorption embayments and sieve textured zones. Orthopyroxene phenocrysts are up to 1.5 mm and some have clinopyroxene rims, occasional sieve textured zones and/or opaque inclusions. Clinopyroxene phenocrysts are up to 0.9 mm. Olivine phenocrysts are up to 0.65 and are altered. Opaque phenocrysts are up to 0.1 mm.	94SJP74A	Lava			Whole-rock	57.3	1.06	17.83	5.9	0.1	4.68	7.43	3.83	1.38	0.22	99.71	55	DCP	6.5	5.9	LOI=0.35	DCP		18.9	388	685															17	133	6.1				2	2.2	18.6	147	98			56	62	58	18.1					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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