AVO Sample Information

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SAMPLE INFO : 93SJP45

Sample ID:	93SJP45
Station ID:	93SJP45
Latitude:	62.47851817
Longitude:	-143.0701957
Datum:	NAD83
Date Sampled:	1993-00-00
Sample Type 1:	Lava
Field Lithology:	Rhyolite

Text Description:
Outcrop of black vitrophyre, ~4-5’ below the epiclastic unit at Site 1 in the Boyden Hills. Sample is from float below the outcrop. Fine grained, hypocrystalline, pilotaxitic, porphyritic to glomeroporphyritic with a matrix of glass, plagioclase, opaque, apatite, zircon, and microlites. Plagioclase phenocrysts (An32 - An35) are up to 3.12 mm and larger grains occasionally have normal zoning. Opaque phenocrysts are up to 0.6 mm,, but most are matrix size. Orthopyroxene phenocrysts are up to 1.1 mm with intense pleochroism and occasionally have opaque inclusions. Biotite? or amphibole? phenocrysts are up to 0.08 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
93SJP45	62.47851817	-143.0701957	Preece, S. J.	1993-00-00		Skookum Creek		Nabesna B-5; T8N, R13E, S18	Outcrop of black vitrophyre, ~4-5’ below the epiclastic unit at Site 1 in the Boyden Hills. Sample is from float below the outcrop. Fine grained, hypocrystalline, pilotaxitic, porphyritic to glomeroporphyritic with a matrix of glass, plagioclase, opaque, apatite, zircon, and microlites. Plagioclase phenocrysts (An32 - An35) are up to 3.12 mm and larger grains occasionally have normal zoning. Opaque phenocrysts are up to 0.6 mm,, but most are matrix size. Orthopyroxene phenocrysts are up to 1.1 mm with intense pleochroism and occasionally have opaque inclusions. Biotite? or amphibole? phenocrysts are up to 0.08 mm.	93SJP45	Lava			Whole-rock	72.91	0.11	13.81	1.35	0.07	0.15	0.97	4.73	3.18	bdl 0	99.64	55	DCP	1.49	1.35	LOI=2.72	DCP		53	833	127															16	142	8.6				4.7	2.9	1.7	1	bdl			bdl	2	45	15.1					55	XRF: Rb, Zr, Nb, Th, U, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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