AVO Sample Information

Alaska Volcano Observatory

You are here: Home > Samples > 95SJP7

SAMPLE INFO : 95SJP7

Sample ID:	95SJP7
Station ID:	95SJP7
Latitude:	62.38156727
Longitude:	-143.0310222
Datum:	NAD83
Date Sampled:	1995-00-00
Sample Type 1:	Lava
Field Lithology:	Dacite

Text Description:
Rubbly outcrop 50 - 60’ thick at the top of Site 8. Visually appears to line up with 93SJP5 across the valley at Site 9. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material and opaque. Plagioclase phenocrysts (An38 - An58) are up to 2.62 mm and frequently have oscillatory zoning and occasionally normal zoning. Orthopyroxene phenocrysts are up to 0.6 mm and often have opaque inclusions, and occasionally have sieve textured zones or resorption embayments. Amphibole phenocrysts are up to 0.45 mm with green-red pleochroism and opaque corona. Opaque phenocrysts are up to 0.35 mm. 84.6% matrix, 13.1% plagioclase, 1.0% orthopyroxene, 1.3% opaque.

References:

Geochemical variation in the less than 5 Ma Wrangell Volcanic Field, Alaska, with an emphasis on the Skookum Creek volcanic complex

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
95SJP7	62.38156727	-143.0310222	Preece, S. J.	1995-00-00		Skookum Creek		Nabesna B-5; T7N, R13E, S17	Rubbly outcrop 50 - 60’ thick at the top of Site 8. Visually appears to line up with 93SJP5 across the valley at Site 9. Fine grained, holocrystalline, porphyritic with a matrix of cryptocrystalline material and opaque. Plagioclase phenocrysts (An38 - An58) are up to 2.62 mm and frequently have oscillatory zoning and occasionally normal zoning. Orthopyroxene phenocrysts are up to 0.6 mm and often have opaque inclusions, and occasionally have sieve textured zones or resorption embayments. Amphibole phenocrysts are up to 0.45 mm with green-red pleochroism and opaque corona. Opaque phenocrysts are up to 0.35 mm. 84.6% matrix, 13.1% plagioclase, 1.0% orthopyroxene, 1.3% opaque.	95SJP7	Lava			Whole-rock	65.3	0.68	16.35	4	0.1	1.33	3.74	4.9	2.06	0.32	99.65	55	DCP	4.44	4	LOI=1.13	DCP		37	709	410															25	200	5.9				4.8	2.2	7.8	42	bdl			2	7	62	16.7					55	XRF: Rb, Zr, Nb, Th, U, Ni, Ga; DCP: Ba, Sc, V; MX: Sr, Y, Cu, Zn;

SAMPLE LOCATION

Contact AVO Privacy Accessibility Information Quality FOIA

URL: www.avo.alaska.edu/samples/sample_info.php
Page modified: August 1, 2017 15:29
Contact Information: AVO Web Team

@alaska_avo

alaska.avo

Receive volcano updates by email: USGS VNS

This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137

Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.