Sample 6

NavDat sample number 37228 · TONALITE

Sample

Sample ID	6
Rock name	TONALITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	30.9951
Longitude	-115.556
State / province	Baja California Sur

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
91		90.4	91.6

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
SIO2	42.48		WT%	EPMA
AL2O3	9.6		WT%	EPMA
TIO2	0.096		WT%	EPMA
FE2O3	3.36		WT%	EPMA
FEO	15.67		WT%	EPMA
MGO	9.39		WT%	EPMA
MNO	0.48		WT%	EPMA
CAO	11.35		WT%	EPMA
NA2O	1.16		WT%	EPMA
K2O	0.98		WT%	EPMA
CR2O3	0		WT%	EPMA
H2O	1.94		WT%	EPMA

References

Ortega, Rivera Amabel; Farrar, E; Hanes, J A; Archibald, D A; Gastil, R G; Kimbrough, D L; Zentilli, M; Lopez, Martinez M; Feraud, G; Ruffet, G (1997) Chronological constraints on the thermal and tilting history of the Sierra San Pedro Martir Pluton, Baja California, Mexico, from U/ Pb, (super 40) Ar/ (super 39) Ar, and fission-track geochronology. Geological Society of America Bulletin. 109; 6, Pages 728-745. 1997. doi:10.1130/0016-7606(1997)109<0728:CCOTTA>2.3.CO;2