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SAMPLE INFO : 93SJP39

Sample ID:	93SJP39
Station ID:	93SJP39
Latitude:	62.445
Longitude:	-143.1246
Datum:	NAD83
Date Sampled:	1993-00-00
Sample Type 1:	Lava
Sample Type 2:	Flow
Field Lithology:	Dacite

Text Description:
Highly fractured outcrop with flow folding in the silicic material near the base of Site 5. Fine-grained, hypocrystalline, porphyritic with a matrix of glass, feldspar and opaque. Plagioclase phenocrysts (An31 - An58) are up to 2.5 mm and some have sieve texture throughout or in zones; there is strong oscillatory zoning, resorbed rims, overgrowth rims on resorbed grains, and amphibole or opaque inclusions. Amphibole phenocrysts are 2.4 -0.1 mm with yellow green-green pleochroism, and some have resorbed rims and/or opaque inclusions. Orthopyroxene phenocrysts are up to 0.5 mm and some have opaque inclusions. Opaque phenocrysts are up to 0.35 mm. Zircon phenocrysts are up to 0.1 mm. 70.5% matrix, 25.4% plagioclase, 0.9% orthopyroxene, 0.9% opaque, 2.3% amphibole.

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
93SJP39	62.445	-143.1246	Preece, S. J.	1993-00-00		Skookum Creek		Nabesna B-5; T8N, R12E, S26	Highly fractured outcrop with flow folding in the silicic material near the base of Site 5. Fine-grained, hypocrystalline, porphyritic with a matrix of glass, feldspar and opaque. Plagioclase phenocrysts (An31 - An58) are up to 2.5 mm and some have sieve texture throughout or in zones; there is strong oscillatory zoning, resorbed rims, overgrowth rims on resorbed grains, and amphibole or opaque inclusions. Amphibole phenocrysts are 2.4 -0.1 mm with yellow green-green pleochroism, and some have resorbed rims and/or opaque inclusions. Orthopyroxene phenocrysts are up to 0.5 mm and some have opaque inclusions. Opaque phenocrysts are up to 0.35 mm. Zircon phenocrysts are up to 0.1 mm. 70.5% matrix, 25.4% plagioclase, 0.9% orthopyroxene, 0.9% opaque, 2.3% amphibole.	93SJP39	Lava			Whole-rock	68.84	0.51	16.09	2.9	0.11	0.76	3.24	4.9	2.19	0.15	100.07	55	DCP	3.21	2.9	LOI=0.31	DCP		40	727	427															16	174	6.8				3.5	1.6	5.8	40	1			3	9	51	16.5					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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