Sample 97-4

NavDat sample number 93488 · ANDESITE

Sample

Sample ID	97-4
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4272
Longitude	-122.16
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	62.21		WT%	XRF
TIO2	0.61		WT%	XRF
AL2O3	17.03		WT%	XRF
FE2O3	4.86		WT%	XRF
MNO	0.08		WT%	XRF
MGO	3.45		WT%	XRF
CAO	5.95		WT%	XRF
NA2O	4.16		WT%	XRF
K2O	1.26		WT%	XRF
P2O5	0.18		WT%	XRF
LOI	0.01		WT%	XRF
SR	682		PPM	XRF
BA	355		PPM	XRF
RB	33		PPM	XRF
Y	11		PPM	XRF
ZR	119		PPM	XRF
ZN	56		PPM	XRF
CU	26		PPM	XRF
NI	25		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