Sample 82-88b

NavDat sample number 93546 · ANDESITE

Sample

Sample ID	82-88b
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3868
Longitude	-122.188
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	62.98		WT%	XRF
TIO2	0.58		WT%	XRF
AL2O3	16.74		WT%	XRF
FE2O3	1.6		WT%	XRF
FEO	2.55		WT%	XRF
MNO	0.07		WT%	XRF
MGO	2.79		WT%	XRF
CAO	5.12		WT%	XRF
NA2O	4.65		WT%	XRF
K2O	1.93		WT%	XRF
P2O5	0.28		WT%	XRF
LOI	0.99		WT%	XRF
SR	913		PPM	XRF
BA	635		PPM	XRF
CE	36		PPM	XRF
LA	24		PPM	XRF
GA	21		PPM	XRF
NB	5		PPM	XRF
RB	45		PPM	XRF
Y	12		PPM	XRF
ZR	167		PPM	XRF
ZN	57		PPM	XRF
CU	30		PPM	XRF
CR	33		PPM	XRF
NI	29		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