Sample PR 1-88

NavDat sample number 42407 · GRANITE

Sample

Sample ID	PR 1-88
Rock name	GRANITE
Rock type	PLUTONIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	38.1055
Longitude	-122.875
State / province	California
Location comment	biotite granite of Tomales Bay

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
82		73.8	90.2

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
RB	154		PPM	EDXRF
SR	103		PPM	EDXRF
RB_SR	1.495			MS
RB87_SR86	4.328			MS
SR87_SR86	0.71358			MS
SR87_SR86_INITIAL	0.70863			MS
RB	799.6		PPM	MS-ID
SR	9.4		PPM	MS-ID
RB_SR	85.06			MS-ID
RB87_SR86	253.22			MS-ID
SR87_SR86	1.00455			MS
SR87_SR86_INITIAL	0.70863			MS
D18O	10.1		PERMILL	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.