Sample 97-7

NavDat sample number 93518 · DACITE

Sample

Sample ID	97-7
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4082
Longitude	-122.214
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	63.02		WT%	XRF
TIO2	0.59		WT%	XRF
AL2O3	16.55		WT%	XRF
FE2O3	4.25		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.51		WT%	XRF
CAO	6.02		WT%	XRF
NA2O	4.12		WT%	XRF
K2O	1.14		WT%	XRF
P2O5	0.21		WT%	XRF
LOI	0.08		WT%	XRF
SR	1030		PPM	XRF
BA	325		PPM	XRF
RB	31		PPM	XRF
Y	11		PPM	XRF
ZR	137		PPM	XRF
ZN	63		PPM	XRF
CU	55		PPM	XRF
NI	53		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