Sample 83-46

NavDat sample number 93485 · ANDESITE

Sample

Sample ID	83-46
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4195
Longitude	-122.164
Location	Hotlum cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0		0.002	0.006

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.88		WT%	XRF
TIO2	0.63		WT%	XRF
AL2O3	17.25		WT%	XRF
FE2O3	1.56		WT%	XRF
FEO	2.98		WT%	XRF
MNO	0.09		WT%	XRF
MGO	2.84		WT%	XRF
CAO	5.61		WT%	XRF
NA2O	4.77		WT%	XRF
K2O	1.26		WT%	XRF
P2O5	0.16		WT%	XRF
LOI	0.44		WT%	XRF
SR	557		PPM	XRF
BA	385		PPM	XRF
CE	22		PPM	XRF
LA	13		PPM	XRF
GA	24		PPM	XRF
NB	4		PPM	XRF
RB	29		PPM	XRF
Y	12		PPM	XRF
ZR	105		PPM	XRF
ZN	73		PPM	XRF
CU	23		PPM	XRF
CR	33		PPM	XRF
NI	23		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