Sample 99-19

NavDat sample number 93499 · ANDESITE

Sample

Sample ID	99-19
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4458
Longitude	-122.161
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	62.8		WT%	XRF
TIO2	0.58		WT%	XRF
AL2O3	16.2		WT%	XRF
FE2O3	3.98		WT%	XRF
MNO	0.06		WT%	XRF
MGO	3.5		WT%	XRF
CAO	5.87		WT%	XRF
NA2O	3.87		WT%	XRF
K2O	1		WT%	XRF
P2O5	0.21		WT%	XRF
LOI	0.74		WT%	XRF
SR	1060		PPM	XRF
BA	260		PPM	XRF
CE	24		PPM	XRF
NB	4		PPM	XRF
RB	19		PPM	XRF
Y	9		PPM	XRF
ZR	103		PPM	XRF
CR	46		PPM	XRF
NI	52		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