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SAMPLE INFO : Snyder_1959_2

Sample ID:	Snyder_1959_2
Station ID:	Snyder_1959_2
Latitude:	51.9531
Longitude:	178.5356
Datum:	NAD83
Sample Type 1:	Lava
Field Lithology:	Andesite

Text Description:
Andesite from typical inclusion in lavas of Double Point dacite. Color: dark gray (N 3). Texture: miarolitic intersertal. Pore space, miarolitic cavities: 20-30 percent. Plagioclase lathes, 45-55 percent, average An60 but range from An26 to An74; megaphenocrysts, 3 percent, show fritted texture. Oxyhornblende, 14 percent, is pleochroic in deep brown and olive brown, occurs in needles with a length-width ratio of 15:1; many hornblende crystals have hollow centers. Orthopyroxene, 6 percent, occurs in euhedral needles with a length-width ratio as much as 30:1. Clinopyroxene, 4 percent, is present as stubby subhedral crystals. Magnetite, 4 percent, anhedrons have a length-width ratio as much as 10:1. Clear brown glass, 14 percent, in groundmass bas N=1.498.

References:

Geology of Little Sitkin Island, 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
Snyder_1959_2	51.9531	178.5356	Snyder, G. L.			Little Sitkin		Collected from small inlier of Double Point dacite about 1 mile west-northwestward of summit of Little Sitkin volcano	Andesite from typical inclusion in lavas of Double Point dacite. Color: dark gray (N 3). Texture: miarolitic intersertal. Pore space, miarolitic cavities: 20-30 percent. Plagioclase lathes, 45-55 percent, average An60 but range from An26 to An74; megaphenocrysts, 3 percent, show fritted texture. Oxyhornblende, 14 percent, is pleochroic in deep brown and olive brown, occurs in needles with a length-width ratio of 15:1; many hornblende crystals have hollow centers. Orthopyroxene, 6 percent, occurs in euhedral needles with a length-width ratio as much as 30:1. Clinopyroxene, 4 percent, is present as stubby subhedral crystals. Magnetite, 4 percent, anhedrons have a length-width ratio as much as 10:1. Clear brown glass, 14 percent, in groundmass bas N=1.498.	Snyder_1959_2	Lava			Whole-rock	55.31	0.85	18.01	8.27	0.15	3.94	8.63	3.13	1.1	0.15	99.92	424	NN	4.45	4.23	H2OM=0.05; H2OP=0.41; CO2=0	NN		17.4		457																												7.7							units are percent 0.9	745	XRF: Rb, Sr, Ni; NN: K;

SAMPLE LOCATION

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