Sample 81 CO TLGD-1

NavDat sample number 10730 · GRANODIORITE

Sample

Sample ID	81 CO TLGD-1
Rock name	GRANODIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	39.065
Longitude	-106.401
Location	Twin Lakes pluton; Sawatch Range
State / province	COLORADO

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
50		45	55

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	69.8		WT%	XRF
AL2O3	15.1		WT%	XRF
FE2O3	3		WT%	XRF
MGO	0.6		WT%	XRF
CAO	3.2		WT%	XRF
NA2O	4.7		WT%	XRF
K2O	3.1		WT%	XRF
H2O_MINUS	0		WT%	XRF
H2O_PLUS	0		WT%	XRF
LOI	0.7		WT%	XRF
RB	72.8		PPM	MS-ID
SR	1087		PPM	MS-ID
SR87_SR86	0.7063			TIMS
SM	4		PPM	MS-ID
ND	23.7		PPM	MS-ID
ND143_ND144	0.511528			TIMS

References

Farmer, G Lang; DePaolo, Donald J (1984) Origin of Mesozoic and Tertiary granite in the Western United States and implications for pre-Mesozoic crustal structure; 2, Nd and Sr isotopic studies of unmineralized and Cu- and Mo-mineralized granite in the Precambrian craton. JGR. Journal of Geophysical Research. B. 89; 12, Pages 10,141-10,160. 1984. . doi:10.1029/JB089iB12p10141