Sample 83-58

NavDat sample number 93506 · DACITE

Sample

Sample ID	83-58
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3975
Longitude	-122.225
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	63.89		WT%	XRF
TIO2	0.56		WT%	XRF
AL2O3	16.54		WT%	XRF
FE2O3	1.72		WT%	XRF
FEO	2.1		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.22		WT%	XRF
CAO	6.06		WT%	XRF
NA2O	4.27		WT%	XRF
K2O	1.11		WT%	XRF
P2O5	0.16		WT%	XRF
LOI	0.52		WT%	XRF
SR	1157		PPM	XRF
BA	282		PPM	XRF
CE	22		PPM	XRF
LA	16		PPM	XRF
GA	27		PPM	XRF
NB	2		PPM	XRF
RB	20		PPM	XRF
Y	10		PPM	XRF
ZR	114		PPM	XRF
ZN	67		PPM	XRF
CU	42		PPM	XRF
CR	41		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