Sample 85-58

NavDat sample number 93554 · ANDESITE

Sample

Sample ID	85-58
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.352
Longitude	-122.174
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	59.85		WT%	XRF
TIO2	0.71		WT%	XRF
AL2O3	16.6		WT%	XRF
FE2O3	2.05		WT%	XRF
FEO	3.22		WT%	XRF
MNO	0.1		WT%	XRF
MGO	4.13		WT%	XRF
CAO	6.68		WT%	XRF
NA2O	3.67		WT%	XRF
K2O	1.5		WT%	XRF
P2O5	0.24		WT%	XRF
LOI	0.78		WT%	XRF
SR	703		PPM	XRF
BA	490		PPM	XRF
CE	40		PPM	XRF
LA	22		PPM	XRF
GA	18		PPM	XRF
NB	5		PPM	XRF
RB	33		PPM	XRF
Y	18		PPM	XRF
ZR	123		PPM	XRF
ZN	59		PPM	XRF
CR	58		PPM	XRF
NI	37		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