Sample 4

NavDat sample number 37226 · TONALITE

Sample

Sample ID	4
Rock name	TONALITE
Rock type	PLUTONIC
Composition	INTERMEDIATE
Material	IGNEOUS

Location

Latitude	30.9611
Longitude	-115.614
State / province	Baja California Sur

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
72		64.6	79.4

Analyses

WHOLE ROCK

Item	Value	Std. dev.	Unit	Method
SIO2	44.15		WT%	EPMA
AL2O3	10.05		WT%	EPMA
TIO2	0.79		WT%	EPMA
FE2O3	3.6		WT%	EPMA
FEO	15.43		WT%	EPMA
MGO	10.28		WT%	EPMA
MNO	0.4		WT%	EPMA
CAO	12.13		WT%	EPMA
NA2O	1.23		WT%	EPMA
K2O	1.07		WT%	EPMA
CR2O3	0.05		WT%	EPMA
H2O	2.02		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