Sample s_97-29I

NavDat sample number 43375 · ANDESITE

Sample

Sample ID	s_97-29I
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Texture	FINE-GRAINED, LACKING PHENOCRYSTS EXCEPT TRACES OF OLIVINE AND PLAGIOCLASE
Comment	QUENCHED INCLUSION IN THE LOWER UNIT

Location

Latitude	46.87
Longitude	-121.758
Location	Burroughs Mountain Lava Flow
State / province	Washington
Location comment	North Vertical Section

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.496		0.489	0.503

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	56.1		WT%	XRF
TIO2	0.96		WT%	XRF
AL2O3	18.1		WT%	XRF
FE2O3T	7.41		WT%	XRF
CAO	7.05		WT%	XRF
MGO	4.55		WT%	XRF
MNO	0.12		WT%	XRF
K2O	1.11		WT%	XRF
NA2O	3.66		WT%	XRF
P2O5	0.17		WT%	XRF
NI	31		PPM	XRF
CU	74		PPM	XRF
ZN	75		PPM	XRF
RB	25		PPM	XRF
SR	512		PPM	XRF
Y	15		PPM	XRF
ZR	108		PPM	XRF
NB	0		PPM	LA-ICPMS
BA	287		PPM	XRF

References

Stockstill, Karen R; Vogel, Thomas A; Sisson, Thomas W (2003) Origin and emplacement of the andesite of Burroughs Mountain, a zoned, large-volume lava flow at Mount Rainier, Washington, USA. Journal of Volcanology and Geothermal Research. 119; 1-4, Pages 275-296. 2003. doi:10.1016/S0377-0273(02)00358-X