Sample 82-87

NavDat sample number 93545 · ANDESITE

Sample

Sample ID	82-87
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3832
Longitude	-122.193
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	61.19		WT%	XRF
TIO2	0.59		WT%	XRF
AL2O3	17.84		WT%	XRF
FE2O3	1.6		WT%	XRF
FEO	2.68		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.28		WT%	XRF
CAO	6.27		WT%	XRF
NA2O	4.23		WT%	XRF
K2O	1.12		WT%	XRF
P2O5	0.15		WT%	XRF
LOI	0.6		WT%	XRF
SR	893		PPM	XRF
BA	291		PPM	XRF
CE	13		PPM	XRF
LA	11		PPM	XRF
GA	23		PPM	XRF
NB	2		PPM	XRF
RB	22		PPM	XRF
Y	11		PPM	XRF
ZR	111		PPM	XRF
ZN	53		PPM	XRF
CU	27		PPM	XRF
CR	33		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