Sample 99-7

NavDat sample number 93522 · ANDESITE

Sample

Sample ID	99-7
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4815
Longitude	-122.26
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	62.6		WT%	XRF
TIO2	0.55		WT%	XRF
AL2O3	16		WT%	XRF
FE2O3	3.99		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.25		WT%	XRF
CAO	6.15		WT%	XRF
NA2O	3.66		WT%	XRF
K2O	1.07		WT%	XRF
P2O5	0.23		WT%	XRF
LOI	1.7		WT%	XRF
SR	1040		PPM	XRF
BA	297		PPM	XRF
CE	27		PPM	XRF
NB	5		PPM	XRF
RB	19		PPM	XRF
Y	10		PPM	XRF
ZR	116		PPM	XRF
ZN	50		PPM	XRF
CU	55		PPM	XRF
CR	63		PPM	XRF
NI	45		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