Sample 97-LT-47

NavDat sample number 130810 · ANDESITE

Sample

Sample ID	97-LT-47
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Cousens and others
Comment	hornblende andesite

Location

Latitude	39.2276
Longitude	-120.01
Location	Brockway
State / province	California

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
7.5		5	10

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	60.91		WT%	XRF
TIO2	0.69		WT%	XRF
AL2O3	17.34		WT%	XRF
FE2O3	5.4		WT%	XRF
MNO	0.1		WT%	XRF
MGO	2.04		WT%	XRF
CAO	5.08		WT%	XRF
NA2O	3.73		WT%	XRF
K2O	2.91		WT%	XRF
P2O5	0.27		WT%	XRF
LOI	1		WT%	XRF
V	123		PPM	XRF
CR	21		PPM	XRF
NI	10		PPM	XRF
RB	81		PPM	XRF
SR	655		PPM	XRF
Y	24		PPM	XRF
ZR	216		PPM	XRF
BA	1549		PPM	XRF
LA	40.15		PPM	ICPMS
ND	32.84		PPM	ICPMS
YB	1.87		PPM	ICPMS
NB	9.49		PPM	ICPMS
CS	2.34		PPM	ICPMS
HF	5.69		PPM	ICPMS
TH	10.51		PPM	ICPMS

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