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Intrusive rocks (Cretaceous and Jurassic)

Hornblende and biotite quartz diorite (tonalite), trondhjemite, granodiorite, and small amounts of norite, in batholithic masses and large dikelike bodies. Includes Bald Mountain Tonalite and Anthony Lake Granodiorite of Taubeneck (1957), tonalite and trondhjemite of Wallowa batholith and Cornucopia stock (Taubeneck, 1964; Nolf, 1966), quartz diorite intrusion in the Snake River area (Morrison, 1963), quartz diorite and minor other intrusive rocks in the Caviness quadrangle (Wolff, 1965), quartz diorite northeast of John Day and southeast of Ironside Mountain (Thayer and Brown, 1964), quartz diorite in the Sparta and Durkee quadrangles (Prostka, 1962; 1967), and granodiorite and related rocks of the Pueblo Mountains (Roback and others, 1987). Rubidium-strontium and potassium-argon ages indicate an age range from about 94 to 160 Ma (Taubeneck, 1963; Thayer and Brown, 1964; Armstrong and others, 1976)
State Oregon
Name Intrusive rocks (Cretaceous and Jurassic)
Geologic age Jurassic to Cretaceous
Comments In OR291, unit includes three composite intrusions consisting of smaller individual intrusions that are chemically and petrographically distinct. The largest composite intrusion is the Bald Mountain batholith, which consists of the Elkhorn pluton (Lower Cretaceous and Upper Jurassic); Lower Cretaceous(?) granitic intrusions (granite of Clear Creek, granite of Anthony Butte, leucogranite of Dutch Creek, granite of Isham Spring); granodiorite intrusions (granodiorite of Indiana Mine Road, granodiorite of Beaver Meadow, tonalite of North Fork of Anthony Creek, granodiorite in Guard Station inlier; Upper Jurassic(?)-Lower Cretaceous), including quartz diorites (Upper Jurassic-Lower Cretaceous?; quartz diorite of Wolf Creek, quartz diorite of Guard Station inlier); lamprophyre (Lower Cretaceous or Upper Jurassic); and quartz gabbro (Lower Cretaceous or Upper Jurassic). The other composite intrusions are the North Fork and the Carney Butte stocks. The North Fork stock consists of the North Fork tonalite (Lower Cretaceous and Upper Jurassic), lamprophyre (Lower Cretaceous or Upper Jurassic) and granite (Lower Cretaceous or Upper Jurassic). The Carney butte stock consists of the granodiorite of Table Mountain (Upper Jurassic or Lower Cretaceous?), trondhjemite of Johnson Creek (Upper Jurassic or Lower Cretaceous), tonalite of Granite Meadows (Upper Jurassic or Lower Cretaceous?), diorite of Alexander Creek (Upper Jurassic?), gabbronorite of Carney Butte (Upper Jurassic?), and gabbronorite of Ridenor Canyon (Upper Jurassic?). Cretaceous and Jurassic diorite and gabbro intrusions are mapped as far north as the Umatilla River Basin (OR292) and include the Carney Butte stock
Primary rock type quartz diorite
Secondary rock type trondhjemite
Other rock types granodiorite
Lithologic constituents
Major
Igneous > Plutonic > Dioritic > Quartz-diorite (Pluton)
Minor
Igneous > Plutonic > Gabbroic > Gabbro (Pluton)
Map references
Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Unit references
Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Walker, G.W. and Repenning, C.A., 1965, Geologic map of Adel quadrangle, Lake, Harney, and Malheur Counties, Oregon: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-446, scale 1:250,000.
Brown, C.E. and Thayer, T.P., 1966, Geologic map of the Canyon City quadrangle, northeastern Oregon: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-447, scale 1:250,000.
Prostka, H.J., 1962, Geology of the Sparta quadrangle, Oregon: Oregon Department of Geology and Mineral Industries Geologic Map Series GMS-1, scale 1:62,500.
Prostka, H.J., 1967, Preliminary geologic map of the Durkee quadrangle, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-3, scale 1, 62,500.
Brooks, H.C., McIntyre, J.R., and Walker, G.W., 1976, Geology of the Oregon part of the Baker 1o by 2o quadrangle: Oregon Department of Geology and Mineral Industries Geologic Map Series GMS-7, scale 1:250,000.
Walker, G.W., 1979, Reconnaissance geologic map of the Oregon part of the Grangeville quadrangle, Baker, Union, Umatilla, and Wallowa Counties, Oregon: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-1116, scale 1;250,000
Walker, G.W., 1973, Reconnaissance geologic map of the Pendleton quadrangle, Oregon and Washington: U.S. Geological Survey Miscellaneus Geologic Investigations Map I-727, scale 1:250,000.
Walker, G.W., 1977, Geologic map of Oregon east of the 121st meridian: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-902, scale 1:500,000.
Nolf, Bruce, 1966, Structure and stratigraphy of part of the northern Wallowa Mountains, northeast Oregon: Princeton, N.J., Princeton University, Ph.D. dissertation, 193 p.
Wolff, E.N., 1965, The geology of the northern half of the Caviness quadrangle, Oregon: Eugene, University of Oregon, Ph.D. dissertation, 214 p.
Taubeneck, W.H., 1957, Geology of the Elkhorn Mountains, northeastern Oregon: Bald Mountain Batholith: Geological Society of America Bulletin, v. 68, no. 2, p. 181-238.
Taubeneck, W.H., 1964, Cornucopia stock, Wallowa Mountains, northeastern Oregon: Field relations: Geological Society of America, v. 75, p. 1093-1116.
Morrison, R.F. The pre-Tertiary geology of the Snake River Canyon between Cache Creek and Dug Bar, Oregon-Idaho boundary: Eugene, University of Oregon, Ph.D. dissertation, 233 p.
Thayer, T.P. and Brown, C.E., 1964, Pre-Tertiary orogenic and plutonic intrusive activity in central and northeastern Oregon: Geological Society of America Bulletin, v. 75, p. 1255-1262.
Roback, R.C., Vander Meulen, D.B., King, H.D., Plouff, Donald, Munts, S.R., and Willet, S.L., 1987, Mineral resources of the Pueblo Mountains Wilderness Study Area. Harney County, Oregon, and Humboldt County, Nevada: U.S. Geological Survey Bulletin 1740-B, 30 p.
Taubeneck, W.H., 1963, Exlosion breccias and injection breccias in Wallowa batholith, Wallowa Mountains, northeastern Oregon [abs.]: Geological Society of America Special Paper 73, p. 253-254.
Armstrong, R.L., Taubeneck, W.H., and Hales, P.O., 1976, Rb/Sr and K/Ar geochronometry of the Mesozoic granitic rocks and their Sr isotopic composition, Oregon, Washington, and Idaho: Geological Society of America Bulletin, v. 88, p. 397-411.
Brooks, H.C., 2006, Preliminary geologic map of the Mormon Basin quadrangle, Baker County, Oregon: Oregon Department of Geology and Mineral Industries Open-File Map O-06-25, scale 1:24,000.
Brooks, H.C., Ferns, M.L., and Mullen, A.D., 1982, Geology and mineral deposits of the Granite quadrangle, Grant County, Oregon: Oregon Department of Geology and Mineral Industries Geologic Map Series GMS-25, scale 1:24,000.
Ferns, M.L., 1989, Geology and mineral resources map of the Graveyard Point quadrangle, Malheur Count Oregon, and Owyhee County, Idaho: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-54, scale 1:24,000.
Ferns, M.L. and Brooks, H.C., 1987, Geology and mineral resources map of the Elkhorn Peak quadrangle, Baker County, Oregon: Oregon Department of Geology and Mineral Industries Geologican Map Series GMS-41, scale 1:24,000.
Brooks, H.C., Ferns, M.L., and Avery, D.G., 1984, Geology and gold deposits of the southwest quarter of the Bates quadrangle, Grant County, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-35, scale 1:24,000.
Ferns, M.L., Brooks, H.C., and Wheeler, G.R., 1984, Geology and gold deposits of the Bates quadrangle, Grant County, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-31, scale 1:24,000.
Ferns, M.L., Brooks, H.C., and Ducette, J., 1982, Geology and mineral resources map of the Mt. Ireland quadrangle, Baker and Grant Counties, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series, GMS-22, scale 1:24,000.
Brooks, H.C., Ferns, M.L., Wheeler, G.R., and Avery, D.G., 1983, Geology and gold deposits map of the northeast quarter of the Bates quadrangle, Baker and Grant Counties, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-29, scale 1:24,000
Brooks, H.C., Ferns, M.L., Coward, R.I., Paul, E.K., and Nunlist, M., 1982, Geology and gold deposits map of the Bourne quadrangle, Baker and Grant Counties, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-19, scale 1:24,000.
Swisher, C.C., Ach, J.A., and Hart, W.K., 1990, Laser fusion 40Ar/39Ar dating of the type Steens Mountain Basalt, southeastern Oregon, and the age of the Steens aeromagnetic polarity transition [abs.]: EOS, Transactions of American Geophysical Union, v. 17, no. 43, p. 1,296.
Brooks, H.C., 1979, Geologic map of the Oregon part of the Mineral quadrangle: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-12, scale 1:62,500.
Evans, J.G., 1989, Geologic map of the Desolation Butte quadrangle, Grant and Umatilla Counties, Oregon: U.S. Geological Survey Geologic Quadrangle GQ-1654, scale 1:62,500.
Brooks, H.C. and Ferns, M.L., 1979, Geologic map of the Bullrun Rock quadrangle, Baker and Grant Counties, Oregon: Oregon Department of Geology and Mineral Industries Open-File Map O-79-6, scale 1:24,000.
Roback, R.C., Vander Meulen, D.B., King, H.D., Plouff, Donald, Munts, S.R., and Willett, S.L., 1987, Mineral resources of the Pueblo Mountains Wilderness Study Area, Harney County, Oregon, and Humboldt County, Nevada: U.S. Geological Survey Bulletin 1740-B, 30 p.
Brooks, H.C., Ferns, M.L., Nusbaum, R.L., and Kovich, P.M., 1979, Geologic map of the Rastus Mountain quadrangle, Baker and Grant Counties, Oregon: Oregon Department of Geology and Mineral Industries Open-File Map O-79-7, scale 1:24,000.
Ferns, M.L., Madin, I.P., and Taubeneck, W.H., 2001, Reconnaissance geologic map of the La Grande 30' x 60' quadrangle, Baker, Grant, Umatilla, and Union Counties, Oregon: Oregon Department of Geology and Mineral Industries Reconnaissance Map Series RMS-1, 52 p., scale 1:100,000.
Ferns, M.L., McConnell, V.S., and Madin, I.P., in prep., Geology of the Umatilla River Basin, Morrow, Umatilla, and Union Counties, Oregon: Oregon Department of Geology and Mineral Industries Open-File Report, 66 p., scale 1:100,000.
Madin, I.P., 1998, Geologic map of the Tucker Flat quadrangle, Union and Baker Counties, Oregon: Oregon Department of Geology and Mineral Industries Geological map Series GMS-110, scale 1;24,000.
Madin, I.P. and Taubeneck, W.H., 2003, Geologic map of the Amnthony Buttes quadrangle, Union and Baker Counties, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-107, scale 1:24,000.
Weiss, P.L., Gualtieri,, J.L., Cannon, W.F., Tucher, E.T., McMahan, A.B., and Federspiel, F.E., 1976, Mineral resources of the Eagle Cap Wilderness and adjacent areas, Oregon: U.S. Geological Survey Bulletin 1385-E, 100 p.
Ferns, M.L. and Taubeneck, W.H., 1994, Geology and mineral resources of the Limber Jim Creek quadrangle, Union County, Oregon: Oregon Department of Geology and Mineral Industries Geological Map Series GMS-82, scale 1:24,000.
Counties Baker - Grant - Harney - Malheur - Morrow - Umatilla - Union - Wallowa - Wheeler