Sample 82-95

NavDat sample number 93549 · DACITE

Sample

Sample ID	82-95
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.4807
Longitude	-122.184
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	63.95		WT%	XRF
TIO2	0.61		WT%	XRF
AL2O3	16.05		WT%	XRF
FE2O3	1.79		WT%	XRF
FEO	2.59		WT%	XRF
MNO	0.08		WT%	XRF
MGO	3.17		WT%	XRF
CAO	5.05		WT%	XRF
NA2O	3.88		WT%	XRF
K2O	2.21		WT%	XRF
P2O5	0.18		WT%	XRF
LOI	0.34		WT%	XRF
SR	487		PPM	XRF
BA	512		PPM	XRF
CE	31		PPM	XRF
LA	20		PPM	XRF
GA	20		PPM	XRF
NB	6		PPM	XRF
RB	70		PPM	XRF
Y	18		PPM	XRF
ZR	170		PPM	XRF
ZN	52		PPM	XRF
CU	21		PPM	XRF
CR	73		PPM	XRF
NI	31		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