Sample A-170

NavDat sample number 58069 · ANDESITE

Sample

Sample ID	A-170
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	30.1167
Longitude	-110.45
Location	Arroyo Alcaparroz
State / province	Sonora
Country	Mexico
Location comment	Arizpe-Bacanuchi

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
70.6		68.7	72.5

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.73		WT%	XRF
AL2O3	16.78		WT%	XRF
FE2O3	5.74		WT%	XRF
FEO	0.19		WT%	XRF
MGO	0.96		WT%	XRF
CAO	4.03		WT%	XRF
NA2O	3.18		WT%	XRF
K2O	3.31		WT%	XRF
TIO2	0.83		WT%	XRF
P2O5	0.15		WT%	XRF
MNO	0.06		WT%	XRF
LOI	1.94		WT%	XRF
BA	511		PPM	ICPMS
CE	66.26		PPM	ICPMS
ND	29.17		PPM	ICPMS
SM	6.25		PPM	ICPMS
EU	1.18		PPM	ICPMS
YB	2.42		PPM	ICPMS
TH	18		PPM	ICPMS
RB	164		PPM	ICPMS
SR	402		PPM	ICPMS
Y	27		PPM	ICPMS
NB	7		PPM	ICPMS

References

Gonzalez Leon, Carlos M; McIntosh, William C; Lozano-Santa Cruz,Rufino; Valencia-Moreno, Martin; Amaya-Martinez, Ricardo; Rodriguez-Castaneda, Jose Luis (2000) Cretaceous and Tertiary sedimentary, magmatic, and tectonic evolutionof north-central Sonora (Arizpe and Bacanuchi quadrangles), NorthwestMexico. Geological Society of America Bulletin, vol.112, no.4, pp.600-610, Apr2000 doi:10.1130/0016-7606(2000)112<600:CATSMA>2.0.CO;2