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SAMPLE INFO : Barth_1956_18

Sample ID:	Barth_1956_18
Station ID:	Barth_1956_18
Latitude:	56.58
Longitude:	-169.63
Datum:	NAD83
Date Sampled:	1948-01-01
Sample Type 1:	Lava

Text Description:
Ore basalt, forming a sill or dike. To the eye and under a low power lens the rock appears dark and almost dense because of its unusually high percentage of ore. It is very fine grained with some odd, small phenocrysts of plagioclase (optical constants corresponding to An60), and a very few, small phenocrysts of olivine that are almost wholly resorbed and often obscured by tiny grains of ore (hematite?) which have grown along closely spaced cleavage planes. Some olivines have been effectively replaced by ore. The profusion of ore gives the rock its distinctive character.

References:

Geology and petrology of the Pribilof Islands, 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
Barth_1956_18	56.58	-169.63	Barth, T. F. W.	1948-01-01		St. George volcanic field		Road between the village and Zapadni Bay, St. George Island	Ore basalt, forming a sill or dike. To the eye and under a low power lens the rock appears dark and almost dense because of its unusually high percentage of ore. It is very fine grained with some odd, small phenocrysts of plagioclase (optical constants corresponding to An60), and a very few, small phenocrysts of olivine that are almost wholly resorbed and often obscured by tiny grains of ore (hematite?) which have grown along closely spaced cleavage planes. Some olivines have been effectively replaced by ore. The profusion of ore gives the rock its distinctive character.	Barth_1956_18	Lava			Whole-rock	49.1	2.6	17.5	10.9	0.2	4.5	8.6	4.3	1.7	0.5	99.8	301	RAPIDA	10.8	1.1

SAMPLE LOCATION

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