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SAMPLE INFO : 93SJP26

Sample ID:	93SJP26
Station ID:	93SJP26
Latitude:	62.435
Longitude:	-143.1099141
Datum:	NAD83
Date Sampled:	1993-00-00
Sample Type 1:	Lava
Field Lithology:	Andesite

Text Description:
Gray outcrop sticking up through the talus of Dome A at Site 2. There is obvious magma mixing with very large amphibole crystals and white blobs of material with black glassy rims. Fine grained, holocrystalline, trachytic, porphyritic to seriate porphyritic with a matrix of mesostasis, plagioclase, opaque and alteration. Plagioclase phenocrysts (An 31-An63) are up to 2.5 mm, commonly display sieve textured zones, resorbed edges or less commonly resorption embayments, overgrowth rims, and complex zoning. Orthopyroxene phenocrysts are up to 2.25 mm. Clinopyroxene phenocrysts are up to 0.45 mm. Amphibole phenocrysts are up to 0.5 mm and have thick brownish rims that are replacing the crystal. Mode: 83.0% matrix, 13.5% plagioclase, 0.4% clinopyroxene, 1.7% orthopyroxene, 1.1% alteration, 0.3% vesicles.

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
93SJP26	62.435	-143.1099141	Preece, S. J.	1993-00-00		Skookum Creek		Nabesna B-5, T8N, R12E, S36	Gray outcrop sticking up through the talus of Dome A at Site 2. There is obvious magma mixing with very large amphibole crystals and white blobs of material with black glassy rims. Fine grained, holocrystalline, trachytic, porphyritic to seriate porphyritic with a matrix of mesostasis, plagioclase, opaque and alteration. Plagioclase phenocrysts (An 31-An63) are up to 2.5 mm, commonly display sieve textured zones, resorbed edges or less commonly resorption embayments, overgrowth rims, and complex zoning. Orthopyroxene phenocrysts are up to 2.25 mm. Clinopyroxene phenocrysts are up to 0.45 mm. Amphibole phenocrysts are up to 0.5 mm and have thick brownish rims that are replacing the crystal. Mode: 83.0% matrix, 13.5% plagioclase, 0.4% clinopyroxene, 1.7% orthopyroxene, 1.1% alteration, 0.3% vesicles.	93SJP26	Lava			Whole-rock	57.2	0.92	19.1	5.95	0.13	3.31	7.5	4.33	1	0.2	99.18	55	DCP	6.51	5.95	LOI=0.29	DCP		16.3	399	609															17	104	4.2				2.1	1.8	17.6	145	25			33	50	71	17.8					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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