Sample 85-55

NavDat sample number 93551 · ANDESITE

Sample

Sample ID	85-55
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3435
Longitude	-122.171
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	57.74		WT%	XRF
TIO2	0.75		WT%	XRF
AL2O3	16.08		WT%	XRF
FE2O3	1.23		WT%	XRF
FEO	4.23		WT%	XRF
MNO	0.11		WT%	XRF
MGO	5.28		WT%	XRF
CAO	8.65		WT%	XRF
NA2O	3.77		WT%	XRF
K2O	1.3		WT%	XRF
P2O5	0.29		WT%	XRF
LOI	1.03		WT%	XRF
SR	973		PPM	XRF
BA	586		PPM	XRF
CE	46		PPM	XRF
LA	26		PPM	XRF
GA	17		PPM	XRF
NB	5		PPM	XRF
RB	21		PPM	XRF
Y	15		PPM	XRF
ZR	121		PPM	XRF
ZN	58		PPM	XRF
CR	122		PPM	XRF
NI	47		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