Sample 97-LT-32

NavDat sample number 130814 · ANDESITE

Sample

Sample ID	97-LT-32
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Cousens and others
Comment	pyroxene andesite

Location

Latitude	39.352
Longitude	-120.203
Location	Alder Hill
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	59.79		WT%	XRF
TIO2	0.664		WT%	XRF
AL2O3	17.35		WT%	XRF
FE2O3	6.632		WT%	XRF
MNO	0.1193		WT%	XRF
MGO	2.527		WT%	XRF
CAO	6.287		WT%	XRF
NA2O	3.44		WT%	XRF
K2O	2.316		WT%	XRF
P2O5	0.219		WT%	XRF
LOI	0.8		WT%	XRF
V	143		PPM	XRF
CR	15		PPM	XRF
NI	6		PPM	XRF
RB	60		PPM	XRF
SR	555		PPM	XRF
Y	34		PPM	XRF
ZR	203		PPM	XRF
BA	1225		PPM	XRF
NB	10		PPM	ICPMS
CO	14		PPM	UNKNOWN
ZN	86		PPM	UNKNOWN
SR87_SR86	0.704881			UNKNOWN
ND143_ND144	0.512662			UNKNOWN
PB208_PB204	38.711			UNKNOWN
PB207_PB204	15.64			UNKNOWN
PB206_PB204	18.975			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