Sample RM178B

NavDat sample number 33424 · DIORITE

Sample

Sample ID	RM178B
Rock name	DIORITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	29.25
Longitude	-103.55
Location	lower border zone, Rattlesnake Mountain sill
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
28.6		26	38

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	52.87		WT%	XRF
TIO2	2.16		WT%	XRF
AL2O3	16.53		WT%	XRF
FEOT	9.47		WT%	ICPAES
MNO	0.18		WT%	XRF
MGO	3.32		WT%	XRF
CAO	4.99		WT%	XRF
NA2O	5.14		WT%	XRF
K2O	3.34		WT%	XRF
P2O5	0.94		WT%	XRF
TOTAL	98.94		WT%	XRF
RB	66.6		PPM	ICPAES
SR	944		PPM	ICPAES
ZR	425		PPM	ICPAES
BA	1523		PPM	ICPAES

References

Carman-Max-F Jr.. (1994) Mechanisms of differentiation in shallow mafic alkaline intrusions, as illustrated in the Big Bend area, western Texas. Journal of Volcanology and Geothermal Research. 61; 1-2, Pages 1-44. 1994. .