Sample BM 10

NavDat sample number 12218 · TRACHYBASALT

Sample

Sample ID	BM 10
Rock name	TRACHYBASALT
Rock type	VOLCANIC
Composition	MAFIC
Material	IGNEOUS
Comment	Trachybasalt lava

Location

Latitude	29
Longitude	-104
Location	Closed Canyon Formation, 11.7mi N of turnoff on road to Big Bend Ranch
State / province	Texas

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
21		18	25

Analyses

Whole rock

Item	Value	Std. dev.	Unit	Method
SIO2	46.84		WT%	XRF
TIO2	2.71		WT%	XRF
AL2O3	16.33		WT%	XRF
FE2O3	1.24		WT%	XRF
FEO	10.36		WT%	XRF
MNO	0.18		WT%	XRF
MGO	7.03		WT%	XRF
CAO	9.01		WT%	XRF
NA2O	4.17		WT%	XRF
K2O	1.25		WT%	XRF
P2O5	0.89		WT%	XRF
TOTAL	100		WT%	XRF
NI	80		PPM	MS-ID
RB	34		PPM	MS-ID
SR	1155		PPM	MS-ID
Y	28		PPM	MS-ID
ZR	212		PPM	MS-ID
NB	68		PPM	MS-ID

References

Cameron, Kenneth L; Cameron, Maryellen (1986) Geochemistry of quartz-normative igneous rocks from the Chinati Mountains and Terlingua areas, West Texas; a comparison with Cenozoic volcanic rocks from Chihuahua and Baja California Sur, Mexico. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 143-163. 1986. .