Sample 3S162

NavDat sample number 29945 · ANDESITE

Sample

Sample ID	3S162
Rock name	ANDESITE
Rock type	VOLCANIC
Composition	INTERMEDIATE
Material	IGNEOUS
Collected by	Brittain
Comment	Flow

Location

Latitude	44.1384
Longitude	-121.72
Location	South Sister
State / province	Oregon

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.093		0.082	0.104

Analyses

Whole Rock

Item	Value	Std. dev.	Unit	Method
SIO2	64.4		WT%	XRF
TIO2	0.72		WT%	XRF
AL2O3	15.8		WT%	XRF
FEOT	5.17		WT%	XRF
MNO	0.1		WT%	XRF
MGO	1.65		WT%	XRF
CAO	3.87		WT%	XRF
NA2O	4.9		WT%	XRF
K2O	2.01		WT%	XRF
P2O5	0.28		WT%	XRF
TOTAL	98.9		WT%	XRF
RB	73		PPM	INAA
BA	611		PPM	INAA
SR	349		PPM	INAA
CO	25		PPM	INAA
NI	2		PPM	INAA
CR	7		PPM	INAA
ZN	73		PPM	INAA

References

Hill, Brittain Eames (1991) Petrogenesis of compositionally distinct silicic volcanoes in theThree Sisters region of the Oregon Cascade Range; the effects ofcrustal extension on the development of continental arc silicicmagmatism.