Sample 99-6

NavDat sample number 93521 · ANDESITE

Sample

Sample ID	99-6
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.44
Longitude	-122.328
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	57.8		WT%	XRF
TIO2	0.86		WT%	XRF
AL2O3	16.2		WT%	XRF
FE2O3	5.79		WT%	XRF
MNO	0.09		WT%	XRF
MGO	5.23		WT%	XRF
CAO	7.62		WT%	XRF
NA2O	3.58		WT%	XRF
K2O	1		WT%	XRF
P2O5	0.33		WT%	XRF
LOI	0.4		WT%	XRF
SR	1250		PPM	XRF
BA	344		PPM	XRF
CE	46		PPM	XRF
NB	5		PPM	XRF
RB	20		PPM	XRF
Y	13		PPM	XRF
ZR	145		PPM	XRF
ZN	74		PPM	XRF
CU	38		PPM	XRF
CR	99		PPM	XRF
NI	55		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