Sample 82-84a

NavDat sample number 93542 · ANDESITE

Sample

Sample ID	82-84a
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Grove and others

Location

Latitude	41.3497
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	61.37		WT%	XRF
TIO2	0.58		WT%	XRF
AL2O3	17.78		WT%	XRF
FE2O3	1.94		WT%	XRF
FEO	2.8		WT%	XRF
MNO	0.07		WT%	XRF
MGO	3.46		WT%	XRF
CAO	6.21		WT%	XRF
NA2O	4.72		WT%	XRF
K2O	1.16		WT%	XRF
P2O5	0.49		WT%	XRF
LOI	0.67		WT%	XRF
SR	515		PPM	XRF
BA	513		PPM	XRF
CE	31		PPM	XRF
LA	19		PPM	XRF
GA	22		PPM	XRF
NB	5		PPM	XRF
RB	64		PPM	XRF
Y	15		PPM	XRF
ZR	163		PPM	XRF
ZN	50		PPM	XRF
CU	7		PPM	XRF
CR	64		PPM	XRF
NI	14		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