Sample 99-12A

NavDat sample number 93491 · ANDESITE

Sample

Sample ID	99-12A
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	56.9		WT%	XRF
TIO2	0.36		WT%	XRF
AL2O3	17.1		WT%	XRF
FE2O3	5.98		WT%	XRF
MNO	0.11		WT%	XRF
MGO	5.9		WT%	XRF
CAO	8.82		WT%	XRF
NA2O	3.03		WT%	XRF
K2O	0.74		WT%	XRF
P2O5	0.13		WT%	XRF
LOI	0.4		WT%	XRF
SR	566		PPM	XRF
BA	204		PPM	XRF
CE	17		PPM	XRF
NB	3		PPM	XRF
RB	18		PPM	XRF
Y	10		PPM	XRF
ZR	69		PPM	XRF
CR	213		PPM	XRF
NI	28		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