Sample PR 9-88

NavDat sample number 42379

Sample

Sample ID	PR 9-88
Rock type	PLUTONIC
Material	IGNEOUS

Location

Latitude	38.1853
Longitude	-122.968
State / province	California
Location comment	Tonalite and granodiorite of McClure's and Kehoe Beaches

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
109.6		98.64	120.56

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
RB	142		PPM	EDXRF
SR	181		PPM	EDXRF
RB_SR	0.785			MS
RB87_SR86	2.27			MS
SR87_SR86	0.71019			MS
SR87_SR86_INITIAL	0.70662			MS

References

Kistler, R W; Champion, D E (2001) Rb-Sr whole-rock and mineral ages, K-Ar, (super 40) Ar/ (super 39) Ar, and U-Pb mineral ages, and strontium, lead, neodymium, and oxygen isotopic compositions for granitic rocks from the Salinian Composite Terrane, California. Open-File Report - U. S. Geological Survey. 2001.