AVO Sample Information

Alaska Volcano Observatory

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SAMPLE INFO : 72-ARh-318

Sample ID:	72-ARh-318
Station ID:	72-ARh-318
Latitude:	62.1379
Longitude:	-143.44668
Datum:	NAD83
Date Sampled:	1972-00-00
Sample Type 1:	Lava
Sample Type 2:	Flow

Text Description:
Basalt and basaltic andesite flows. Extensive sequence of thin to medium flows with oxidized dark-red scoriaceous tops and bottoms in northwestern part of quadrangle. Rocks are gray to dark gray and contain small phenocrysts of olivine and minor hypersthene in a fine-grained intergranular to intersertal matrix of plagioclase and augite. Locally matrix is altered to chlorite and clay minerals. Source probably from volcanic center to northwest in Nabesna B-6 quadrangle.

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-318	62.1379	-143.44668	Richter, D. H.	1972-00-00				Nabesna A-5 quadrangle; Wrangell Lava; Wrangell Volcanic Field. lat long points derived from paper map.	Basalt and basaltic andesite flows. Extensive sequence of thin to medium flows with oxidized dark-red scoriaceous tops and bottoms in northwestern part of quadrangle. Rocks are gray to dark gray and contain small phenocrysts of olivine and minor hypersthene in a fine-grained intergranular to intersertal matrix of plagioclase and augite. Locally matrix is altered to chlorite and clay minerals. Source probably from volcanic center to northwest in Nabesna B-6 quadrangle.	72-ARh-318	Lava			Whole-rock	54.1	1.4	17.1	8.4	0.13	5.5	7.9	3.8	0.9	0.37	100.65	4537	RAPIDA	3.9	4.9	H2O=0.55	RAPIDA

SAMPLE LOCATION

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