AVO Sample Information

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SAMPLE INFO : 94SJP39

Sample ID:	94SJP39
Station ID:	94SJP39
Latitude:	62.427404
Longitude:	-143.1238023
Datum:	NAD83
Date Sampled:	1994-00-00
Sample Type 1:	Lava
Sample Type 2:	Dike
Field Lithology:	Dacite

Text Description:
Approximately 15-20’ thick dike that outcrops as rubbly plates and cuts up vertically through silicic material from Dome A as well as flows of unit nA1 at Site 3. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and minor alteration. Plagioclase phenocrysts (An28 - An47, An67) are up to 3.25 mm and are frequently rounded; some have oscillatory zoning; some have patchy, resorbed cores with complex overgrowth rims or resorption embayments. Amphibole phenocrysts are up to 0.5 mm with green-yellow pleochroism. Orthopyroxene phenocrysts are up to 0.5 mm with reddish oxidation? along rims. Opaque phenocrysts up to 0.35 mm. One clinopyroxene phenocrysts, 0.8 mm, was observed.

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
94SJP39	62.427404	-143.1238023	Preece, S. J.	1994-00-00		Skookum Creek		Nabesna B-5; T8N, R12E, S35	Approximately 15-20’ thick dike that outcrops as rubbly plates and cuts up vertically through silicic material from Dome A as well as flows of unit nA1 at Site 3. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material, opaque, plagioclase and minor alteration. Plagioclase phenocrysts (An28 - An47, An67) are up to 3.25 mm and are frequently rounded; some have oscillatory zoning; some have patchy, resorbed cores with complex overgrowth rims or resorption embayments. Amphibole phenocrysts are up to 0.5 mm with green-yellow pleochroism. Orthopyroxene phenocrysts are up to 0.5 mm with reddish oxidation? along rims. Opaque phenocrysts up to 0.35 mm. One clinopyroxene phenocrysts, 0.8 mm, was observed.	94SJP39	Lava			Whole-rock	67.39	0.54	16.4	3.45	0.11	0.73	3.32	4.94	2.11	0.24	100.29	55	DCP	3.83	3.45	LOI=0.74	DCP		39	727	390															21	229	7.5				5.6	1.4	8.3	83	2			5	13	63	17.5					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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