AVO Sample Information

Alaska Volcano Observatory

You are here: Home > Samples > Riehle_1987_11b

SAMPLE INFO : Riehle_1987_11b

Sample ID:	Riehle_1987_11b
Station ID:	Riehle_1987_11
Latitude:	57.0179
Longitude:	-157.1864
Datum:	NAD83
Sample Type 1:	pyroclastic density current
Sample Type 2:	Juvenile
Field Lithology:	Basaltic Andesite

Text Description:
Sample of pyroclastic flow deposit that has 50% or more ash matrix, and on the basis of its granulometry is classified as an ash-flow tuff. Sample is representative only of the fine-grained matrix. Vesicular, porphyritic basaltic andesite with subhedral to euhedral phenocrysts of plagioclase, clino- and orthopyroxene, and hornblende in a fine-grained, holocrystalline groundmass. Hornblende also occurs in the groundmass and shows minor reaction rims of clinopyroxene but no opaque rims. (Texture: Vesicular vitrophyre; groundmass 0.2-0.4 mm, plagioclase > clinopyroxene = hornblende > opaque (orthopyroxene?); hornblende rimmed by clinopyroxene and plagioclase; rare glass. Alteration: None)

References:

Petrography, chemistry, and geologic history of Yantarni volcano, Aleutian volcanic arc, 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
Riehle_1987_11	57.0179	-157.1864	Unknown, Unknown			Yantarni			Sample of pyroclastic flow deposit that has 50% or more ash matrix, and on the basis of its granulometry is classified as an ash-flow tuff. Sample is representative only of the fine-grained matrix. Vesicular, porphyritic basaltic andesite with subhedral to euhedral phenocrysts of plagioclase, clino- and orthopyroxene, and hornblende in a fine-grained, holocrystalline groundmass. Hornblende also occurs in the groundmass and shows minor reaction rims of clinopyroxene but no opaque rims. (Texture: Vesicular vitrophyre; groundmass 0.2-0.4 mm, plagioclase > clinopyroxene = hornblende > opaque (orthopyroxene?); hornblende rimmed by clinopyroxene and plagioclase; rare glass. Alteration: None)	Riehle_1987_11b	pyroclastic density current	Bomb		Whole-rock	55	0.93	17.4	7.83	0.14	4.5	9.13	2.46	1.29	0.15	Total calculated from mixed methods 100.3	199	XRF	3.65	4.54	LOI=1.11	XRF

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.