Sample 97-LT-94

NavDat sample number 130835 · ANDESITE

Sample

Sample ID	97-LT-94
Rock name	ANDESITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Cousens and others
Comment	dike

Location

Latitude	39.1903
Longitude	-120.272
Location	Squaw Peak
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
14		1	28

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	59.5		WT%	XRF
TIO2	0.517		WT%	XRF
AL2O3	17.96		WT%	XRF
FE2O3	5.307		WT%	XRF
MNO	0.0494		WT%	XRF
MGO	1.837		WT%	XRF
CAO	5.125		WT%	XRF
NA2O	4.08		WT%	XRF
K2O	2.395		WT%	XRF
P2O5	0.373		WT%	XRF
LOI	2.6		WT%	XRF
V	84		PPM	XRF
CR	12		PPM	XRF
NI	6		PPM	XRF
RB	50		PPM	XRF
SR	799		PPM	XRF
Y	18		PPM	XRF
ZR	188		PPM	XRF
BA	1446		PPM	XRF
NB	12		PPM	ICPMS
CO	11		PPM	UNKNOWN
ZN	87		PPM	UNKNOWN
SR87_SR86	0.705612			UNKNOWN
ND143_ND144	0.512579			UNKNOWN
PB208_PB204	38.755			UNKNOWN
PB207_PB204	15.636			UNKNOWN
PB206_PB204	19.03			UNKNOWN

References

Cousens, Brian; Prytulak, Julie; Henry, Christopher; Alcazar, Al; Brownrigg, Tim (2008) Geology, geochronology, and geochemistry of the Miocene-Pliocene ancestral Cascades Arc, northern Sierra Nevada, California and Nevada;the roles of the upper mantle, subducting slab, and the Sierra Nevadalithosphere. Geosphere, vol. 4, no. 5, pp.829-853, Oct 2008 doi:10.1130/GES00166.1