Sample 99-4

NavDat sample number 93519 · ANDESITE

Sample

Sample ID	99-4
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4202
Longitude	-122.347
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	59.1		WT%	XRF
TIO2	0.79		WT%	XRF
AL2O3	15.8		WT%	XRF
FE2O3	4.94		WT%	XRF
MNO	0.08		WT%	XRF
MGO	4.68		WT%	XRF
CAO	6.67		WT%	XRF
NA2O	3.69		WT%	XRF
K2O	1.79		WT%	XRF
P2O5	0.46		WT%	XRF
LOI	1.19		WT%	XRF
SR	1860		PPM	XRF
BA	1110		PPM	XRF
CE	63		PPM	XRF
NB	6		PPM	XRF
RB	28		PPM	XRF
Y	12		PPM	XRF
ZR	156		PPM	XRF
ZN	65		PPM	XRF
CU	49		PPM	XRF
CR	89		PPM	XRF
NI	94		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