Sample 85-56

NavDat sample number 93552 · ANDESITE

Sample

Sample ID	85-56
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3502
Longitude	-122.175
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	56.93		WT%	XRF
TIO2	0.76		WT%	XRF
AL2O3	16.29		WT%	XRF
FE2O3	1.72		WT%	XRF
FEO	3.96		WT%	XRF
MNO	0.11		WT%	XRF
MGO	5.55		WT%	XRF
CAO	8.21		WT%	XRF
NA2O	3.56		WT%	XRF
K2O	1.16		WT%	XRF
P2O5	0.3		WT%	XRF
LOI	1.73		WT%	XRF
SR	976		PPM	XRF
BA	591		PPM	XRF
CE	52		PPM	XRF
LA	26		PPM	XRF
GA	17		PPM	XRF
NB	4		PPM	XRF
RB	20		PPM	XRF
Y	15		PPM	XRF
ZR	118		PPM	XRF
ZN	63		PPM	XRF
CR	130		PPM	XRF
NI	51		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