AVO Sample Information

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SAMPLE INFO : 72-PCL-72

Sample ID:	72-PCL-72
Station ID:	72-PCL-72
Latitude:	62.3589
Longitude:	-143.40308
Datum:	NAD83
Date Sampled:	1972-00-00
Sample Type 1:	Lava
Field Lithology:	Rhyodacite

Text Description:
Wrangell Lava. Rhyodacite domes and associated flows. Massive, usually gray rocks that weather pinkish gray to tan. Commonly porphyritic, with abundant phenocrysts of plagioclase (as much as 60% of rock), hypersthene, and minor oxyhornblende and altered biotite. Locally devitrified and altered to chlorite and clay minerals. K-Ar date on plagioclase from large dome in northeastern part of quadrangle (sec. 7 , T. 7 N., R. 13 E.) is 3.74 m.y. (M. Lanphere, written commun., 1977)

References:

Geologic map of the Nabesna B-5 Quadrangle, Alaska

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
72-PCL-72	62.3589	-143.40308	Lowe, P. C.	1972-00-00				Nabesna B-5 Quadrangle; latitude and longitude derived from paper map.	Wrangell Lava. Rhyodacite domes and associated flows. Massive, usually gray rocks that weather pinkish gray to tan. Commonly porphyritic, with abundant phenocrysts of plagioclase (as much as 60% of rock), hypersthene, and minor oxyhornblende and altered biotite. Locally devitrified and altered to chlorite and clay minerals. K-Ar date on plagioclase from large dome in northeastern part of quadrangle (sec. 7 , T. 7 N., R. 13 E.) is 3.74 m.y. (M. Lanphere, written commun., 1977)	72-PCL-72	Lava			Whole-rock	68.7	0.62	15.6	3.4	0.12	0.62	1.5	5.5	3.2	0.13	99.9	4540	RAPIDA	1.9	1.7	H2OP=0.41; H2OM=0.12; CO2=0.05	RAPIDA

SAMPLE LOCATION

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