Sample 82-83

NavDat sample number 93541 · ANDESITE

Sample

Sample ID	82-83
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3542
Longitude	-122.192
Location	Sargents Ridge cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.19		0.13	0.25

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	61.59		WT%	XRF
TIO2	0.59		WT%	XRF
AL2O3	17.7		WT%	XRF
FE2O3	1.3		WT%	XRF
FEO	3.44		WT%	XRF
MNO	0.09		WT%	XRF
MGO	3.31		WT%	XRF
CAO	5.95		WT%	XRF
NA2O	4.23		WT%	XRF
K2O	1.48		WT%	XRF
P2O5	0.16		WT%	XRF
LOI	0.47		WT%	XRF
SR	651		PPM	XRF
BA	430		PPM	XRF
CE	21		PPM	XRF
LA	14		PPM	XRF
GA	23		PPM	XRF
NB	4		PPM	XRF
RB	37		PPM	XRF
Y	14		PPM	XRF
ZR	133		PPM	XRF
ZN	57		PPM	XRF
CU	30		PPM	XRF
CR	32		PPM	XRF
NI	24		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