Sample 400 Tasa

NavDat sample number 88778 · ANDESITE

Sample

Sample ID	400 Tasa
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Alteration	plag 0-10% replaced by K-feldspar
Comment	Altered

Location

Latitude	32.327
Longitude	-112.858
State / province	Arizona

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
25		22.3	27.7

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
SIO2	61.6		WT%	XRF
AL2O3	15.9		WT%	XRF
FE2O3	4.8		WT%	XRF
MGO	3.03		WT%	XRF
CAO	5.15		WT%	XRF
NA2O	4.26		WT%	XRF
K2O	1.95		WT%	XRF
TIO2	0.658		WT%	XRF
P2O5	0.31		WT%	XRF
MNO	0.07		WT%	XRF
LOI	2.25		WT%	XRF
TOTAL	100.2		WT%	XRF
RB	173		PPM	XRF
ZR	285		PPM	ICP
NB	12		PPM	ICP
V	43		PPM	ICP
CR	17		PPM	ICP
CO	3		PPM	ICP
NI	12		PPM	ICP
CU	33.9		PPM	ICP
ZN	15.3		PPM	ICP
SR	915		PPM	ICP
Y	18		PPM	ICP
BA	1370		PPM	ICP
LA	15.8		PPM	ICP
PB	3		PPM	ICP

References

Cox, Dennis P; Force, Eric R; Wilkinson, William H; More, Syver W; Rivera, John S; Wooden, Joseph L (2006) The Ajo mining district, Pima County, Arizona; evidence for middle Cenozoic detachment faulting, plutonism, volcanism, and hydrothermal alteration. U. S. Geological Survey Professional Paper, Report: P 1733, 46 pp., 1 Sheet, 2006