Sample 99-9

NavDat sample number 93540 · DACITE

Sample

Sample ID	99-9
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3768
Longitude	-122.324
Location	Misery Hill cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.05		0.01	0.08

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	63.7		WT%	XRF
TIO2	0.53		WT%	XRF
AL2O3	16.5		WT%	XRF
FE2O3	3.91		WT%	XRF
MNO	0.06		WT%	XRF
MGO	2.85		WT%	XRF
CAO	4.77		WT%	XRF
NA2O	3.96		WT%	XRF
K2O	1.78		WT%	XRF
P2O5	0.19		WT%	XRF
LOI	0.95		WT%	XRF
SR	482		PPM	XRF
BA	443		PPM	XRF
CE	33		PPM	XRF
LA	18		PPM	XRF
GA	19		PPM	XRF
NB	5		PPM	XRF
RB	53		PPM	XRF
Y	12		PPM	XRF
ZR	119		PPM	XRF
ZN	59		PPM	XRF
CU	39		PPM	XRF
CR	43		PPM	XRF
NI	44		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