Sample 99-18

NavDat sample number 93498 · ANDESITE

Sample

Sample ID	99-18
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4462
Longitude	-122.168
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	61.4		WT%	XRF
TIO2	0.65		WT%	XRF
AL2O3	16.8		WT%	XRF
FE2O3	4.62		WT%	XRF
MNO	0.08		WT%	XRF
MGO	3.53		WT%	XRF
CAO	6.07		WT%	XRF
NA2O	3.98		WT%	XRF
K2O	1.23		WT%	XRF
P2O5	0.27		WT%	XRF
LOI	0.45		WT%	XRF
SR	1020		PPM	XRF
BA	407		PPM	XRF
CE	32		PPM	XRF
NB	5		PPM	XRF
RB	16		PPM	XRF
Y	12		PPM	XRF
ZR	122		PPM	XRF
CR	51		PPM	XRF
NI	50		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