AVO Sample Information

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SAMPLE INFO : 72-ARh-309

Sample ID:	72-ARh-309
Station ID:	72-ARh-309
Latitude:	62.0435
Longitude:	-143.26998
Datum:	NAD83
Date Sampled:	1972-00-00
Sample Type 1:	Lava
Sample Type 2:	Flow

Text Description:
Basalt and basaltic andesite flows. Dense thin to thick extensive flows, locally exhibiting pronounced columnar jointing. Rocks are chiefly gray to dark-gray olivine basalts containing abundant phenocrysts of olivine, with minor hypersthene, in a felty to intergranular matrix of augite and plagioclase. Indicated source areas are the Ice Fields Plateau, the northeastern part of Jaeger Mesa, and an eruptive center in the southeast corner of the Nabesna B-5 quadrangle. K-Ar date (M.A. Lanphere, written commun., 1974) on whole rock indicates age of 0.89 +/- 0.21 m.y. (Sample 73-ARh-99)

References:

Geologic map of the Nabesna A-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-ARh-309	62.0435	-143.26998	Richter, D. H.	1972-00-00				Nabesna A-5 quadrangle; Wrangell Lava; Wrangell Volcanic Field. lat long points derived from paper map. Sample from Ice Fields Plateau and associated eruptive centers.	Basalt and basaltic andesite flows. Dense thin to thick extensive flows, locally exhibiting pronounced columnar jointing. Rocks are chiefly gray to dark-gray olivine basalts containing abundant phenocrysts of olivine, with minor hypersthene, in a felty to intergranular matrix of augite and plagioclase. Indicated source areas are the Ice Fields Plateau, the northeastern part of Jaeger Mesa, and an eruptive center in the southeast corner of the Nabesna B-5 quadrangle. K-Ar date (M.A. Lanphere, written commun., 1974) on whole rock indicates age of 0.89 +/- 0.21 m.y. (Sample 73-ARh-99)	72-ARh-309	Lava			Whole-rock	54.6	1.3	16.8	7.6	0.12	6.4	7.8	3.6	0.87	0.3	99.4	4537	RAPIDA	2.6	5.2	H2O=0.72	RAPIDA

SAMPLE LOCATION

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