AVO Sample Information

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SAMPLE INFO : 81-ARh-33

Sample ID:	81-ARh-33
Station ID:	81-ARh-33
Latitude:	62.3745
Longitude:	-143.62248
Datum:	NAD83
Date Sampled:	1981-00-00
Sample Type 1:	Lava
Sample Type 2:	Flow

Text Description:
Wrangell Lava. Tanada volcano. Shield lavas. Chiefly dark-gray to medium-gray, thin to medium (2-10 m) flows of sparsely porphyritic andesite and basaltic andesite and minor intercalated laharic and pyroclastic deposits. Flows contain phenocrysts of plagioclase (1-2%, 1-5 mm), augite (0-1%, 1-2 mm), and traces of hypersthene, olivine, and opaque minerals in a microfelty to pilotaxitic groundmass. * * * In the adjacent Nabesna B-5 quadrangle (Lowe and others, 1982) the andesite and basaltic andesite flows of their unit QTaf are mostly equivalent to Tanada shield lavas.

References:

Geologic map of the Nabesna B-6 Quadrangle, south-central 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
81-ARh-33	62.3745	-143.62248	Richter, D. H.	1981-00-00		Tanada Peak		Wrangell Lava; Nabesna B-6 quadrangle. Latitude and longitude derived from paper map.	Wrangell Lava. Tanada volcano. Shield lavas. Chiefly dark-gray to medium-gray, thin to medium (2-10 m) flows of sparsely porphyritic andesite and basaltic andesite and minor intercalated laharic and pyroclastic deposits. Flows contain phenocrysts of plagioclase (1-2%, 1-5 mm), augite (0-1%, 1-2 mm), and traces of hypersthene, olivine, and opaque minerals in a microfelty to pilotaxitic groundmass. * * * In the adjacent Nabesna B-5 quadrangle (Lowe and others, 1982) the andesite and basaltic andesite flows of their unit QTaf are mostly equivalent to Tanada shield lavas.	81-ARh-33	Lava			Whole-rock	56.4	1.19	17.6	7.23	0.12	4.27	7.28	3.71	1.59	0.34	100.1	2321	NN	2.24	5.2	H2OP=0.2; H2OM=0.08; CO2=0.01	RAPIDA

SAMPLE LOCATION

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