Sample 85-42

NavDat sample number 93557 · DACITE

Sample

Sample ID	85-42
Rock name	DACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3165
Longitude	-122.181
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	63.48		WT%	XRF
TIO2	0.38		WT%	XRF
AL2O3	18.72		WT%	XRF
FE2O3	1.54		WT%	XRF
FEO	1.69		WT%	XRF
MNO	0.08		WT%	XRF
MGO	0.58		WT%	XRF
CAO	2.54		WT%	XRF
NA2O	6.18		WT%	XRF
K2O	1.72		WT%	XRF
P2O5	0.11		WT%	XRF
LOI	3.09		WT%	XRF
SR	381		PPM	XRF
BA	808		PPM	XRF
CE	52		PPM	XRF
LA	115		PPM	XRF
GA	27		PPM	XRF
NB	9		PPM	XRF
RB	42		PPM	XRF
Y	44		PPM	XRF
ZR	239		PPM	XRF
ZN	69		PPM	XRF
CR	2		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