Sample 85-3

NavDat sample number 93507 · ANDESITE

Sample

Sample ID	85-3
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.466
Longitude	-122.326
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	61.2		WT%	XRF
TIO2	0.68		WT%	XRF
AL2O3	16.22		WT%	XRF
FE2O3	0.67		WT%	XRF
FEO	3.81		WT%	XRF
MNO	0.09		WT%	XRF
MGO	4.18		WT%	XRF
CAO	6.56		WT%	XRF
NA2O	4.06		WT%	XRF
K2O	1.03		WT%	XRF
P2O5	0.23		WT%	XRF
LOI	1.44		WT%	XRF
SR	1138		PPM	XRF
BA	308		PPM	XRF
CE	34		PPM	XRF
LA	17		PPM	XRF
GA	19		PPM	XRF
NB	5		PPM	XRF
RB	16		PPM	XRF
Y	13		PPM	XRF
ZR	96		PPM	XRF
ZN	51		PPM	XRF
CU	61		PPM	XRF
CR	94		PPM	XRF
NI	53		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