Sample 82-89

NavDat sample number 93547 · DACITE

Sample

Sample ID	82-89
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3845
Longitude	-122.19
Location	Sargents Ridge cone
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.19		0.13	0.25

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	65.26		WT%	XRF
TIO2	0.51		WT%	XRF
AL2O3	15.86		WT%	XRF
FE2O3	3.17		WT%	XRF
FEO	0.88		WT%	XRF
MNO	0.07		WT%	XRF
MGO	2.76		WT%	XRF
CAO	4.8		WT%	XRF
NA2O	3.94		WT%	XRF
K2O	2.11		WT%	XRF
P2O5	0.17		WT%	XRF
LOI	0.66		WT%	XRF
SR	872		PPM	XRF
BA	314		PPM	XRF
CE	17		PPM	XRF
LA	11		PPM	XRF
GA	23		PPM	XRF
NB	3		PPM	XRF
RB	25		PPM	XRF
Y	11		PPM	XRF
ZR	118		PPM	XRF
ZN	56		PPM	XRF
CU	27		PPM	XRF
CR	37		PPM	XRF
NI	35		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