Sample 99-11

NavDat sample number 93524 · ANDESITE

Sample

Sample ID	99-11
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.526
Longitude	-122.304
Location	Shastina cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.01		0.0094	0.01

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.1		WT%	XRF
TIO2	0.57		WT%	XRF
AL2O3	16.6		WT%	XRF
FE2O3	4.2		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.31		WT%	XRF
CAO	5.99		WT%	XRF
NA2O	3.8		WT%	XRF
K2O	1.15		WT%	XRF
P2O5	0.24		WT%	XRF
LOI	1.06		WT%	XRF
SR	1040		PPM	XRF
BA	305		PPM	XRF
CE	28		PPM	XRF
LA	14		PPM	XRF
GA	21		PPM	XRF
NB	5		PPM	XRF
RB	21		PPM	XRF
Y	11		PPM	XRF
ZR	121		PPM	XRF
ZN	54		PPM	XRF
CU	46		PPM	XRF
CR	47		PPM	XRF
NI	52		PPM	XRF

References

Grove, Timothy L; Baker, Michael B; Price, Richard C; Parman, StephenW; Elkins-Tanton, Linda T; Chatterjee, Nilanjan; Muentener, Othmar (2005) Magnesian andesite and dacite lavas from Mt. Shasta, NorthernCalifornia; products of fractional crystallization of H (sub 2) O-richmantle melts. Contributions to Mineralogy and Petrology, vol.148, no.5, pp.542-565,Jan 2005 doi:10.1007/s00410-004-0619-6