Sample NE 20

NavDat sample number 8688 · ANDESITE

Sample

Sample ID	NE 20
Alternate ID	203
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Comment	Un. Clermond Ferrand, France

Location

Latitude	18.885
Longitude	-99.655
Location	Nevado de Toluca
State / province	Mexico

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
1.6	0.15	1	3

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	62.9		WT%	UNKNOWN
TIO2	0.6		WT%	UNKNOWN
AL2O3	16.6		WT%	UNKNOWN
FE2O3	1.85		WT%	UNKNOWN
FEO	2.03		WT%	UNKNOWN
MNO	0.06		WT%	UNKNOWN
MGO	2.9		WT%	UNKNOWN
CAO	4		WT%	UNKNOWN
NA2O	4.3		WT%	UNKNOWN
K2O	2.35		WT%	UNKNOWN
H2O_PLUS	1.47		WT%	UNKNOWN
H2O_MINUS	0.2		WT%	UNKNOWN

References

Cantagrel, J M; Robin, C; Vincent, P (1981) Les grandes etapes d'evolution d'un volcan andesitique composite; exemple du Nevado de Toluca Mexique. Bulletin Volcanologique. 44; 2, Pages 177-188. 1981.