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SAMPLE INFO : 93SJP55

Sample ID:	93SJP55
Station ID:	93SJP55
Latitude:	62.41434749
Longitude:	-143.1601895
Datum:	NAD83
Date Sampled:	1993-00-00
Sample Type 1:	Lava
Sample Type 2:	Dome
Field Lithology:	Rhyolite

Text Description:
Block from the upper part of the carapace of Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz, opaque and alteration. Plagioclase phenocrysts (An31 - An45) are up to 2.95 mm and tend to be rounded, frequently have strong oscillatory zoning and some mica alteration is present. Opaque phenocrysts are up to 0.45 mm. There is an altered phase that now consists of opaque rim with granular core of an unidentifiable high relief mineral ± feldspar. A second altered phase, larger in size, is now serpentine/chlorite. 82.0% matrix, 14.7% plagioclase, 0.2% opaque, 0.6% altered phase, 0.2% alteration, 2.3% 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
93SJP55	62.41434749	-143.1601895	Preece, S. J.	1993-00-00		Skookum Creek		Nabesna B-5; T7N, R12E, S3	Block from the upper part of the carapace of Dome F at Site 4. Fine grained, holocrystalline, porphyritic with a matrix of equigranular feldspar, quartz, opaque and alteration. Plagioclase phenocrysts (An31 - An45) are up to 2.95 mm and tend to be rounded, frequently have strong oscillatory zoning and some mica alteration is present. Opaque phenocrysts are up to 0.45 mm. There is an altered phase that now consists of opaque rim with granular core of an unidentifiable high relief mineral ± feldspar. A second altered phase, larger in size, is now serpentine/chlorite. 82.0% matrix, 14.7% plagioclase, 0.2% opaque, 0.6% altered phase, 0.2% alteration, 2.3% vesicles.	93SJP55	Lava			Whole-rock	70.58	0.35	15.6	2.34	0.08	0.59	2.27	4.95	2.34	0.14	99.1	55	DCP	2.57	2.34	LOI=0.78	DCP		42	756	292															16	178	6.8				3.6	1.6	3.8	14	bdl			1	4	62	16.3					55	XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

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