Sample 95-13

NavDat sample number 93509 · DACITE

Sample

Sample ID	95-13
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.437
Longitude	-122.231
Location	Shastina cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.01		0.0094	0.01

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.2		WT%	XRF
TIO2	0.49		WT%	XRF
AL2O3	16.8		WT%	XRF
FE2O3	3.83		WT%	XRF
MNO	0.06		WT%	XRF
MGO	3.32		WT%	XRF
CAO	5.98		WT%	XRF
NA2O	4.03		WT%	XRF
K2O	1		WT%	XRF
P2O5	0.16		WT%	XRF
LOI	0.18		WT%	XRF
SR	1120		PPM	XRF
BA	208		PPM	XRF
NB	1		PPM	XRF
ZR	71		PPM	XRF
ZN	47		PPM	XRF
CR	82		PPM	XRF
NI	49		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