AVO Sample Information

Alaska Volcano Observatory

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SAMPLE INFO : 72-PCL-68

Sample ID:	72-PCL-68
Station ID:	72-PCL-68
Latitude:	62.2675
Longitude:	-143.48788
Datum:	NAD83
Date Sampled:	1972-00-00
Sample Type 1:	Lava
Sample Type 2:	Flow
Field Epoch Guess:	Oligocene

Text Description:
Wrangell Lava. Andesite and basaltic andesite flows - Extensive sequence of thin to medium flows with oxidized dark-red scoriaceous tops and bottoms. May include younger thin basalt flows from local eruptive centers. Rocks are gray to dark gray with small (<1 mm) phenocrysts of olivine and minor hypersthene in a fine-grained intergranular to intersertal matrix of plagioclase and augite. Locally, rocks are altered to chlorite and clay minerals. Sources probably to the west in the Nabsena B-6 quadrangle. Rocks distinguished from similar unit QTau by predominance of olivine over hypersthene and by absence of pyroclastic beds

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-68	62.2675	-143.48788	Lowe, P. C.	1972-00-00				Nabesna B-5 Quadrangle; latitude and longitude derived from paper map.	Wrangell Lava. Andesite and basaltic andesite flows - Extensive sequence of thin to medium flows with oxidized dark-red scoriaceous tops and bottoms. May include younger thin basalt flows from local eruptive centers. Rocks are gray to dark gray with small (<1 mm) phenocrysts of olivine and minor hypersthene in a fine-grained intergranular to intersertal matrix of plagioclase and augite. Locally, rocks are altered to chlorite and clay minerals. Sources probably to the west in the Nabsena B-6 quadrangle. Rocks distinguished from similar unit QTau by predominance of olivine over hypersthene and by absence of pyroclastic beds	72-PCL-68	Lava			Whole-rock	57.2	0.84	18	5.5	0.1	4.9	7.8	3	1.2	0.17	100.1	4540	RAPIDA	1.8	3.9	H2OP=1; H2OM=0.27; CO2=0.05	RAPIDA

SAMPLE LOCATION

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