Sample s_1204

NavDat sample number 33832 · RHYODACITE

Sample

Sample ID	s_1204
Rock name	RHYODACITE
Rock type	VOLCANIC
Composition	FELSIC
Material	IGNEOUS

Location

Latitude	42.88
Longitude	-121.96
Location	CASCADES / HIGH CASCADES / NORTHWESTERN CASCADES / MOUNT MAZAMA / PACIFIC OCEAN
State / province	OREGON
Location comment	CRATER LAKE, SCOTT CREEK

Age

Age (Ma)	Error	Min	Max	Geologic age	Dated by
0.41		0.395	0.423	QUATERNARY

Analyses

Whole rock

Item	Value	Unit	Method
SIO2	68.4	WT%	XRF
TIO2	0.54	WT%	XRF
AL2O3	15.4	WT%	XRF
FE2O3T	3.52	WT%	XRF
CAO	3.04	WT%	XRF
MGO	1.21	WT%	XRF
MNO	0.06	WT%	XRF
K2O	2.27	WT%	AES
NA2O	5.06	WT%	AES
P2O5	0.12	WT%	XRF
LOI	0.85	WT%	IGN
RB	49	PPM	XRF
SR	354	PPM	XRF
Y	25	PPM	XRF
ZR	202	PPM	XRF
BA	705	PPM	XRF
SIO2	57.3	WT%	XRF
AL2O3	26.8	WT%	XRF
FEOT	0.31	WT%	EPMA
CAO	8.82	WT%	XRF
MGO	0.03	WT%	XRF
SRO	0.16	WT%	EPMA
K2O	0.23	WT%	AES
NA2O	6.29	WT%	AES
SIO2	61.3	WT%	XRF
AL2O3	24.2	WT%	XRF
FEOT	0.31	WT%	EPMA
CAO	5.83	WT%	XRF
MGO	0.02	WT%	XRF
SRO	0.09	WT%	EPMA
K2O	0.43	WT%	AES
NA2O	8.2	WT%	AES
SIO2	54.6	WT%	XRF
AL2O3	28.9	WT%	XRF
FEOT	0.35	WT%	EPMA
CAO	10.86	WT%	XRF
MGO	0.04	WT%	XRF
SRO	0.23	WT%	EPMA
K2O	0.17	WT%	AES
NA2O	5.61	WT%	AES
SIO2	62.1	WT%	XRF
AL2O3	23.1	WT%	XRF
FEOT	0.22	WT%	EPMA
CAO	4.94	WT%	XRF
MGO	0.02	WT%	XRF
SRO	0.1	WT%	EPMA
K2O	0.46	WT%	AES
NA2O	8.1	WT%	AES
SIO2	51.6	WT%	XRF
AL2O3	30.5	WT%	XRF
FEOT	0.57	WT%	EPMA
CAO	13.45	WT%	XRF
MGO	0.13	WT%	XRF
SRO	0.21	WT%	EPMA
K2O	0.07	WT%	AES
NA2O	4	WT%	AES
SIO2	61	WT%	XRF
AL2O3	23.9	WT%	XRF
FEOT	0.41	WT%	EPMA
CAO	6.16	WT%	XRF
MGO	0.03	WT%	XRF
SRO	0.13	WT%	EPMA
K2O	0.37	WT%	AES
NA2O	8.33	WT%	AES
SIO2	50.8	WT%	XRF
AL2O3	31.2	WT%	XRF
FEOT	0.51	WT%	EPMA
CAO	14.05	WT%	XRF
MGO	0.1	WT%	XRF
SRO	0.13	WT%	EPMA
K2O	0.08	WT%	AES
NA2O	3.51	WT%	AES
SIO2	58.5	WT%	XRF
AL2O3	25.9	WT%	XRF
FEOT	0.35	WT%	EPMA
CAO	7.95	WT%	XRF
MGO	0.05	WT%	XRF
SRO	0.18	WT%	EPMA
K2O	0.31	WT%	AES
NA2O	6.82	WT%	AES
SIO2	52.2	WT%	XRF
TIO2	0.45	WT%	XRF
AL2O3	2.55	WT%	XRF
CR2O3	0.21	WT%	EPMA
FEOT	6.99	WT%	EPMA
CAO	20.6	WT%	XRF
MGO	16.3	WT%	XRF
MNO	0.19	WT%	XRF
NA2O	0.3	WT%	AES
WO	38.7	MOL%	EPMA
SIO2	52.4	WT%	XRF
TIO2	0.54	WT%	XRF
AL2O3	2.1	WT%	XRF
CR2O3	0.01	WT%	EPMA
FEOT	9.15	WT%	EPMA
CAO	19.3	WT%	XRF
MGO	15.9	WT%	XRF
MNO	0.29	WT%	XRF
NA2O	0.24	WT%	AES
WO	36.7	MOL%	EPMA
SIO2	53.3	WT%	XRF
TIO2	0.18	WT%	XRF
AL2O3	0.53	WT%	XRF
CR2O3	0.02	WT%	EPMA
FEOT	20.3	WT%	EPMA
CAO	1.13	WT%	XRF
MGO	23	WT%	XRF
MNO	0.82	WT%	XRF
NA2O	0.03	WT%	AES
WO	2.3	MOL%	EPMA
SIO2	52.8	WT%	XRF
TIO2	0.16	WT%	XRF
AL2O3	0.49	WT%	XRF
CR2O3	0.01	WT%	EPMA
FEOT	20.8	WT%	EPMA
CAO	1.18	WT%	XRF
MGO	22.5	WT%	XRF
MNO	0.84	WT%	XRF
NA2O	0.01	WT%	AES
WO	2.4	MOL%	EPMA
SIO2	43	WT%	XRF
TIO2	3.12	WT%	XRF
AL2O3	10.8	WT%	XRF
FEOT	12.3	WT%	EPMA
CAO	11.5	WT%	XRF
MGO	14	WT%	XRF
MNO	0.23	WT%	XRF
K2O	0.32	WT%	AES
NA2O	2.45	WT%	AES
SIO2	44.5	WT%	XRF
TIO2	2.9	WT%	XRF
AL2O3	9.63	WT%	XRF
FEOT	12.5	WT%	EPMA
CAO	11.4	WT%	XRF
MGO	14.3	WT%	XRF
MNO	0.25	WT%	XRF
K2O	0.38	WT%	AES
NA2O	2.27	WT%	AES

References

Nakada, Setsuya; Bacon, Charles R; Gartner, Anne E (1994) Origin of phenocrysts and compositional diversity in pre-Mazama rhyodacite lavas, Crater Lake, Oregon. Journal of Petrology. 35; 1, Pages 127-162. 1994.