Sample 85-2a

NavDat sample number 93537 · ANDESITE

Sample

Sample ID	85-2a
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4815
Longitude	-122.313
Location	Misery Hill cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.05		0.01	0.08

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.5		WT%	XRF
TIO2	0.63		WT%	XRF
AL2O3	16.99		WT%	XRF
FE2O3	0.88		WT%	XRF
FEO	3.16		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.33		WT%	XRF
CAO	6.22		WT%	XRF
NA2O	4.01		WT%	XRF
K2O	1.16		WT%	XRF
P2O5	0.17		WT%	XRF
LOI	0.75		WT%	XRF
SR	1062		PPM	XRF
BA	306		PPM	XRF
CE	31		PPM	XRF
LA	17		PPM	XRF
GA	21		PPM	XRF
NB	4		PPM	XRF
RB	25		PPM	XRF
Y	12		PPM	XRF
ZR	91		PPM	XRF
ZN	45		PPM	XRF
CU	27		PPM	XRF
CR	53		PPM	XRF
NI	21		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