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SAMPLE INFO : 93SJP30

Sample ID:	93SJP30
Station ID:	93SJP30
Latitude:	62.43018185
Longitude:	-143.1013028
Datum:	NAD83
Date Sampled:	1993-00-00
Sample Type 1:	Lava
Sample Type 2:	Dike
Field Lithology:	Dacite

Text Description:
A 3-5’ thick, vertical dike trending N32°E, with a chill margin against silicic material of Dome A at Site 2. Fine-grained, vesicular, holocrystalline, pilotaxitic, porphyritic to glomeroporphyritic with a matrix of cryptocrystalline material, opaque, feldspar and alteration lining vesicles. Plagioclase phenocrysts (An37 - An61) are 2.2 -0.1 mm, and some have sieve textured cores or intermediate zones, complex zoning with prussian blue extinction, resorption embayments and rounded rims. Orthopyroxene phenocrysts are 1.2-0.1 mm and some have clinopyroxene rims or opaque inclusions. Clinopyroxene phenocrysts are 1.5-0.1 mm. Amphibole phenocrysts are 2.4-0.1 mm and display green-brown pleochroism; some grains have black coronas. Opaque phenocrysts are up to 0.3 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
93SJP30	62.43018185	-143.1013028	Preece, S. J.	1993-00-00		Skookum Creek		Nabesna B-5; T8N, R12E, S36	A 3-5’ thick, vertical dike trending N32°E, with a chill margin against silicic material of Dome A at Site 2. Fine-grained, vesicular, holocrystalline, pilotaxitic, porphyritic to glomeroporphyritic with a matrix of cryptocrystalline material, opaque, feldspar and alteration lining vesicles. Plagioclase phenocrysts (An37 - An61) are 2.2 -0.1 mm, and some have sieve textured cores or intermediate zones, complex zoning with prussian blue extinction, resorption embayments and rounded rims. Orthopyroxene phenocrysts are 1.2-0.1 mm and some have clinopyroxene rims or opaque inclusions. Clinopyroxene phenocrysts are 1.5-0.1 mm. Amphibole phenocrysts are 2.4-0.1 mm and display green-brown pleochroism; some grains have black coronas. Opaque phenocrysts are up to 0.3 mm.	93SJP30	Lava			Whole-rock	64.77	0.75	16.7	4	0.09	1.22	3.83	4.98	2.21	0.27	100.24	55	DCP	4.44	4	LOI=1.18	DCP		39	703	401															25	223	7.4				4.3	3.4	9.3	59	3			2	8	69	17.6					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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