AVO Sample Information

Alaska Volcano Observatory

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SAMPLE INFO : 95-ASL-18B

Sample ID:	95-ASL-18B
Station ID:	95-ASL-18
Latitude:	62.13
Longitude:	-143.10998
Datum:	NAD83
Sample Type 1:	Tephra Fall
Sample Type 2:	Pyroclast

Text Description:
Knob on the west side of Mt. Gordon. Outcrop consists of red scoria rubble occasionally encasing dark blue melt. Interpreted as a "fire fountain" eruption setting. Gabbroic xenoliths are present in massive melt material. May represent the youngest activity in the area. Sample 18A is blue-gray agglutinate with 3-5% small (<1 mm) olivine phenocrysts and 5-7% 1-2 mm acicular plagioclase. 18B is a red pyroclastic sample with the same mode.

References:

A reconnaissance study of mafic to intermediate intra-arc volcanism in the western Wrangell Volcanic Field, 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
95-ASL-18	62.13	-143.10998	Lunt, A. S.			Gordon		Mount Gordon. SW 1/4, NW 1/4, Sec 18, T4N, R12E, Nabesna A-5 quad, Alaska	Knob on the west side of Mt. Gordon. Outcrop consists of red scoria rubble occasionally encasing dark blue melt. Interpreted as a "fire fountain" eruption setting. Gabbroic xenoliths are present in massive melt material. May represent the youngest activity in the area. Sample 18A is blue-gray agglutinate with 3-5% small (<1 mm) olivine phenocrysts and 5-7% 1-2 mm acicular plagioclase. 18B is a red pyroclastic sample with the same mode.	95-ASL-18B	Tephra Fall	Cumulate		Whole-rock	55.18	1.11	17.33	7.56	0.14	5.27	7.53	3.9	0.98	0.38	100.62	6122	DCP	8.38	7.56	LOI=0.62	DCP		15	3556	578	13	33													21	139	6.7						21	171	103			64	45	70	17					6122	DCP

SAMPLE LOCATION

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