Sample 99-12B

NavDat sample number 93492 · ANDESITE

Sample

Sample ID	99-12B
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4258
Longitude	-122.163
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	55.7		WT%	XRF
TIO2	0.54		WT%	XRF
AL2O3	16.8		WT%	XRF
FE2O3	7.29		WT%	XRF
MNO	0.14		WT%	XRF
MGO	6.08		WT%	XRF
CAO	9.23		WT%	XRF
NA2O	2.88		WT%	XRF
K2O	0.48		WT%	XRF
P2O5	0.13		WT%	XRF
LOI	0.19		WT%	XRF
SR	517		PPM	XRF
BA	198		PPM	XRF
CE	15		PPM	XRF
NB	3		PPM	XRF
RB	14		PPM	XRF
Y	12		PPM	XRF
ZR	53		PPM	XRF
CR	108		PPM	XRF
NI	43		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