Sample Y-320

NavDat sample number 32278 · GRANODIORITE

Sample

Sample ID	Y-320
Rock name	GRANODIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	37.735
Longitude	-119.597
Location	Hetch Hetchy
State / province	California
Pluton	Sentinel Granodiorite

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
95		85.5	104.5

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	65.3		WT%	RAPID_ROCK
TIO2	0.78		WT%	RAPID_ROCK
AL2O3	16		WT%	RAPID_ROCK
FE2O3	1.6		WT%	RAPID_ROCK
FEO	2.6		WT%	RAPID_ROCK
MNO	0.05		WT%	RAPID_ROCK
MGO	1.9		WT%	RAPID_ROCK
CAO	4.6		WT%	RAPID_ROCK
NA2O	3.4		WT%	RAPID_ROCK
K2O	2.7		WT%	RAPID_ROCK
P2O5	0.25		WT%	RAPID_ROCK

References

Bateman, Paul C; Dodge, Franklin C W; Bruggman, Peggy E (1984) Major oxide analyses, CIPW norms, modes, and bulk specific gravities of plutonic rocks from the Mariposa 1 degrees by 2 degrees sheet, central Sierra Nevada, California. Open-File Report - U. S. Geological Survey, Report: OF 84-0162, 59 pp., 1984