Sample 82-82

NavDat sample number 93500 · ANDESITE

Sample

Sample ID	82-82
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.496
Longitude	-122.297
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	62.49		WT%	XRF
TIO2	0.56		WT%	XRF
AL2O3	16.31		WT%	XRF
FEO	5.21		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.45		WT%	XRF
CAO	5.94		WT%	XRF
NA2O	4.15		WT%	XRF
K2O	1.12		WT%	XRF
P2O5	0.19		WT%	XRF
LOI	0.36		WT%	XRF
SR	1147		PPM	XRF
BA	308		PPM	XRF
CE	24		PPM	XRF
LA	14		PPM	XRF
GA	23		PPM	XRF
NB	3		PPM	XRF
RB	23		PPM	XRF
Y	13		PPM	XRF
ZR	150		PPM	XRF
ZN	51		PPM	XRF
CU	45		PPM	XRF
CR	66		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