Sample PHA93602

NavDat sample number 43494 · DACITE

Sample

Sample ID	PHA93602
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Comment	Hancock dacite dome

Location

Latitude	44.9244
Longitude	-120.426
State / province	Oregon
Formation	Clarno Formation

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
56.1		55.5	56.7

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	67.01		WT%	XRF
AL2O3	16.36		WT%	XRF
TIO2	0.372		WT%	XRF
FEO	2.86		WT%	XRF
MNO	0.052		WT%	XRF
CAO	3.56		WT%	XRF
MGO	0.39		WT%	XRF
K2O	1.95		WT%	XRF
NA2O	3.45		WT%	XRF
P2O5	0.182		WT%	XRF
TOTAL	96.19		WT%	XRF
NI	1		PPM	XRF
CR	4		PPM	XRF
SC	7		PPM	XRF
V	1		PPM	XRF
BA	526		PPM	XRF
RB	49		PPM	XRF
SR	422		PPM	XRF
ZR	155		PPM	XRF
Y	12		PPM	XRF
NB	11		PPM	XRF
GA	19		PPM	XRF
TH	6		PPM	XRF

References

Bestland, E A; Hammond, P E; Blackwell, D L S; Keys, M A; Retallack, GJ; Stimac, J (2002) Geologic framework of the Clarno Unit, John Day Fossil Beds NationalMonument, central Oregon. Open File Report - State of Oregon, Department of Geology and MineralIndustries, Report: O-02-03, 1 disc, 2002