Sample 4A

NavDat sample number 128221 · GRANODIORITE

Sample

Sample ID	4A
Rock name	GRANODIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Frost, Thomas
Comment	Lamarck

Location

Latitude	37.21
Longitude	-118.644
Location	Lamark Granodiorite
State / province	California
Volcanic field	Eastern Sierra Nevada

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
91.6		91	92.2

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	70.6		WT%	XRF
TIO2	0.3		WT%	XRF
AL2O3	14.4		WT%	XRF
FE2O3	2.55		WT%	XRF
MNO	0.05		WT%	XRF
MGO	1.1		WT%	XRF
CAO	2.51		WT%	XRF
NA2O	3.1		WT%	XRF
K2O	4.4		WT%	XRF
P2O5	0.11		WT%	XRF
LOI	0.34		WT%	XRF
BA	990		PPM	EDXRF
CE	50		PPM	EDXRF
RB	185		PPM	EDXRF
SR	370		PPM	EDXRF
Y	12		PPM	EDXRF
ZR	88		PPM	EDXRF
NB	15		PPM	EDXRF
ZN	50		PPM	EDXRF

References

Frost, Thomas P. (1987) Sample localities, descriptions, major- and trace-element abundances from the Lamarck Granodiorite and associated mafic rocks, eastern Sierra Nevada, California. Open-File Report - U. S. Geological Survey, Report: OF 87-0193, 38 pp., 1987