Date File Created	Name of Creator
3/30/07	Trevor Nace
GeoRef Data	2007-028084
DN	GeoRef
TI	"A rift-edge facies of the Late Jurassic Rogue-Chetco Arc and JosephineOphiolite, Klamath Mountains, Oregon"
AU	"Yule, J Douglas; Saleeby, Jason B; Barnes, Calvin G"
AF	"California Institute of Technology, Division of Geological andPlanetary Sciences, Pasadena, CA, United States (USA)"
AF	"Texas Tech University, United States (USA); Texas Tech University,United States (USA)"
MT	"Geological studies in the Klamath Mountains province, California andOregon; a volume in honor of William P. Irwin"
ED	"Snoke, Arthur W; Barnes, Calvin G"
AF	"University of Wyoming, Department of Geology and Geophysics, Laramie,WY, United States (USA)"
SO	"Special Paper - Geological Society of America, vol.410, pp.53-76,2006"
IS	0072-1077
CD	GSAPAZ
IB	0813724104; 978081372410
DE	California; depositional environment; fabric; Fiddler Mountain;Invertebrata; Josephine Ophiolite; Jurassic; Klamath Mountains;lithofacies; lithosphere; major elements; Mesozoic; metals;microfossils; olistostromes; Onion Camp; Oregon; plate tectonics;Protista; provenance; Radiolaria; rare earths; Rattlesnake CreekTerrane; rifting; Rogue-Chetco Arc; sedimentary structures; softsediment deformation; trace elements; United States; Upper Jurassic
AB	"The western Jurassic belt of the Klamath Mountains represents one ofthe Earth's best-preserved exposures of ancient marginal ocean basinlithosphere and chiefly consists of the coeval Rogue-Chetcovolcanic-plutonic oceanic arc and Josephine ophiolite. This LateJurassic ocean basin is hypothesized to have formed in response torifting that initiated at ca. 165 Ma along the western margin of NorthAmerica, disrupting a Middle Jurassic arc that had been constructed onolder Klamath terranes and forming a marginal ocean basin with anactive arc, inter-arc basin, and remnant arc. Previous workerscharacterized a ""rift-edge"" facies in the remnant-arc region. Thischapter describes field, age, and geochemical data that suggest that asimilar rift-edge facies exists in the vicinity of the active arc, onthe opposite side of the marginal basin. The rift-edge facies in theactive arc setting consists of two main lithotectonic units, hereinnamed informally as the Onion Camp complex and Fiddler Mountainolistostrome. The Onion Camp complex is partly composed of acharacteristic metabasalt and red chert association. Red chert yieldedscarce radiolarians of Triassic(?) and Early Jurassic age. A distinctchert-pebble conglomerate occurs at scarce localities withinmetasedimentary rocks. Concordant, composite bodies of amphibolite andserpentinized peridotite represent another distinctive feature of theOnion Camp complex. The metamorphic and lithologic features of theOnion Camp complex are similar to the lower melange unit of theRattlesnake Creek terrane, and the units are interpreted to becorrelative. The Fiddler Mountain olistostrome is composed of LateJurassic (Kimmeridgian?) pelagic and hemipelagic rocks interlayeredwith ophioliteclast breccia and megabreccia, similar in character toolistostromal deposits associated with the rift-edge facies of theremnant arc. The occurrence of the Rattlesnake Creek terrane and anassociated olistostromal deposit within the western Jurassic belt ofsouthwestern Oregon may therefore represent the rift-edge facies inthe active arc setting, at the transition between the Rogue-Chetco arcand Josephine ophiolite, further corroborating previous models for theLate Jurassic tectonic evolution of the Klamath Mountains."																																		
LA	English																																		
FE	"References: 70; illus. incl. sects., 5 tables, geol. sketch maps"																																		
PY	2006																																		
PT	Serial; Analytic																																		
CP	United States (USA)																																		
LL	"Latitude:N410000,N430000 Longitude:W1230000,W1243000"																																		
CL	"18, Solid-earth geophysics"																																		
CY	"GeoRef, Copyright 2007, American Geological Institute."																																		
UD	200708																																		
DO	10.1130/2006.2410(03)																																		
AN	2007-028084																																		
JV	410																																		
JP	53-76																																		
Sample Data																																			
Item	SiO2	TiO2	Al2O3	Fe2O3	MnO	MgO	CaO	Na2O	K2O	P2O5	Total	Rb	Sr	Zr	Y	Nb	Ba	Sc	V	Cr	Ni	Cu	Zn	Location_Name	Rock_Type	material	Rock_class	Sample Comment	LatDD	LongDD	Loc_prec	Age	Max_age	Min_age	State
Units	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	wt%	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm	ppm						dd	dd	dd	ma	ma	ma	
Method	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1						2	2		3	3	3	
Sample Name																																			
CP-3	48.51	2.66	14.45	13.1	0.2	4.47	8.86	4.58	0.27	0.39	100.33	7	225	197	43.3	28	70	33.4	285	64	44	55	115	Onion Camp	Volcanic	whole rock	basalt	Pillow Lava	42.2364	-123.7961	0.0001	171.3	181.6	162.1	Oregon
OM-8	48.54	1.38	14.57	12.24	0.21	5.93	10.05	3.68	0.42	0.2	99.66	9	245	81	39.7	4	46	43.8	279	212	53	23	83		Volcanic	whole rock	basalt	Pillow Lava	42.4406	-123.5956	0.0001	171.3	181.6	162.1	Oregon
EDM-83A	46.31	2.2	15.36	10.75	0.16	6.7	9.73	4.03	0.3	0.39	100.37	6	361	156	26.1	30	132	24.4	209	200	138	51	78	Illinois River	Volcanic	whole rock	basalt	Pillow Lava	42.2889	-123.6258	0.0001	171.3	181.6	162.1	Oregon
EDM-83B	45.68	2.06	15.39	9.65	0.15	5	11.42	4.44	0.48	0.38	100.97	8	419	146	24.7	32	201	21.9	204	179	121	41	74	Illinois River	Volcanic	whole rock	basalt	Pillow Lava	42.2889	-123.6258	0.0001	171.3	181.6	162.1	Oregon
EDM-87	52.12	0.7	16.33	10.26	0.15	6.61	5.44	4.77	0.43	0.09	100.31	7	145	44	23.8	1	123	35.6	296	111	91	60	87		Volcanic	whole rock	basalt	Pillow Lava	42.2967	-123.7283	0.0001	171.3	181.6	162.1	Oregon
G-14C	52.49	0.77	15.45	8.38	0.13	9.12	7.42	4.14	0.12	0.09	100.85	3	137	57	22.1	1	27	38.7	223	547	252	75	57	"Hellgate Canyon, Rogue River Gorge"	Volcanic	whole rock	basalt	Pillow Lava	42.5436	-123.5111	0.0001	171.3	181.6	162.1	Oregon
OM-11	54.06	1.18	13.47	7.82	0.17	7.7	8.57	4.09	0.75	0.16	100.16	13	90	99	29.6	4	62	28.4	212	247	97	53	55	Onion Mountain	Volcanic	whole rock	basalt	Massive Greenstone	42.4653	-123.5956	0.0001	171.3	181.6	162.1	Oregon
OM-14	53.98	0.51	14.79	7.99	0.14	8.23	8.45	3.23	0.34	0.08	100.75	8	156	36	16.5	0	155	36.2	228	341	101	74	51		Volcanic	whole rock	basalt	Massive Greenstone	42.4978	-123.5433	0.0001	171.3	181.6	162.1	Oregon
G-14A	49.02	1.27	15.89	9.25	0.15	6.46	9.69	3.68	0.14	0.16	98.37	4	256	104	32.8	2	33	35.5	245	233	90	52	63	"Hellgate Canyon, Rogue River Gorge"	Volcanic	whole rock	basalt	Massive Greenstone	42.5436	-123.5111	0.0001	171.3	181.6	162.1	Oregon
CP-45	50.14	0.93	16.19	8.89	0.15	6.63	13.14	2.21	0.03	0.1	102.11	2	56	65	24.5	0	11	37.6	195	209	75	104	46	Babyfoot Lake	Volcanic	whole rock	basalt	Massive Greenstone	42.22	-123.8061	0.0001	171.3	181.6	162.1	Oregon
CR-22	49.52	1.38	12.12	13.7	0.22	7.17	8.86	2.83	0.22	0.11	99.22	7	100	68	32.8	4	26	49.3	325	109	50	85	103		Volcanic	whole rock	basalt	Massive Greenstone	42.4272	-123.6258	0.0001	171.3	181.6	162.1	Oregon
JM-11	76.63	0.22	13.33	1.12	0.02	0.53	2.27	4.68	1.06	0.03	100.57	22	121	105	10.9	5	355	2.3	16	11	20		9	Whetstone Butte	Plutonic	whole rock	granite	Dike	42.2458	-123.8097	0.0001	171.3	181.6	162.1	Oregon
Method Data																																			
1	ICPMS	457
2	TABLE	2007-028084
3	REG_COR	457