Provenance Analysis of the Cretaceous Hornbrook Formation of northern California and southern Oregon

The provenance of the Cretaceous Hornbrook Formation, deposited unconformably on the eastern terranes of the Klamath Mountains of northern California and southern Oregon, may prove critical to reconstructing the complex Cretaceous paleogeography of this region. Sandstone petrography from each of the five members of the Hornbrook Formation indicates a variable source region with elements from basement uplift, transitional continent, recycled orogen, and dissected arc sources. A conglomerate clast count from the Klamath River Conglomerate member is broadly consistent with sandstone petrography, but yielded more quartzite and fewer volcanic clasts than the sand-sized fraction. This reflects the different susceptibility to weathering and diagenesis of these rock types. Likewise, Klamath River Conglomerate quartzite clasts contain a Precambrian detrital zircon age distribution very similar to that found in the Antelope Mountain Quartzite within the Yreka subterrane of the eastern Klamath Mountains while all the other Precambrian zircons from the Hornbrook Formation resemble northern Sierra Nevada terranes. This discrepancy suggests that the quartzite was not broken down into sand-sized grains during transport, but rocks from plutonic arc sources were disaggregated. In addition, detrital zircon age spectra from sandstones throughout the strata of the Hornbrook Formation clearly show that the provenance of the Hornbrook Formation changed with time and was not limited to the Klamath Mountains, contrary to past assumptions. In the Mesozoic detrital zircon age distribution, the reduction in the Early Cretaceous peak and the appearance of a Late Cretaceous peak suggests increasing input from an active magmatic arc other than a Klamath Mountain source. This age signature is supported by the variability of the sandstone petrography, the decreasing volcanic input, and the decreasing

[1]  D. Williams,et al.  Testing the reliability of discrimination diagrams for determining the tectonic depositional environment of ancient sedimentary basins , 2007 .

[2]  P. Vermeesch.  How many grains are needed for a provenance study , 2004 .

[3]  M. Mcwilliams,et al.  Lithofacies control in detrital zircon provenance studies: Insights from the Cretaceous Methow basin, southern Canadian Cordillera , 2003 .

[4]  Michael McWilliams,et al.  Detrital zircon provenance analysis of the Great Valley Group, California: Evolution of an arc-forearc system , 2002 .

[5]  J. Kirschvink,et al.  Measurements of the Cretaceous Paleolatitude of Vancouver Island: Consistent with the Baja-British Columbia Hypothesis , 1997 .

[6]  J. Ague,et al.  Regional tilt of the Mount Stuart batholith, Washington, determined using aluminum-in-hornblende barometry: Implications for northward translation of Baja British Columbia , 1996 .

[7]  G. Gehrels,et al.  Detrital zircon reference for Cambrian to Triassic miogeoclinal strata of western North America , 1995 .

[8]  Calvin G. Barnes,et al.  Timescales of orogeny: Jurassic construction of the Klamath Mountains , 1995 .

[9]  E. Irving,et al.  Paleomagnetism of the Upper Cretaceous strata of Mount Tatlow: evidence for 3000 km of northward displacement of the eastern Coast Belt, British Columbia , 1995 .

[10]  T. Vandall.  Cretaceous Coast Belt paleomagnetic data from the Spetch Creek pluton, British Columbia: evidence for the , 1993 .

[11]  E. T. Wallin.  Petrogenetic and tectonic significance of xenocrystic Precambrian zircon in Lower Cambrian tonalite, eastern Klamath Mountains, California , 1990 .

[12]  H. Day,et al.  Implications of U-Pb zircon ages for the tectonic settings of the Smartville and Slate Creek complexes, northern Sierra Nevada, California , 1989 .

[13]  J. Saleeby,et al.  U/Pb, Sm/Nd and Rb/Sr geochronological and isotopic study of northern Sierra Nevada ophiolitic assemblages, California , 1989 .

[14]  James E. Wright,et al.  An expanded view of Jurassic orogenesis in the western United States Cordillera: Middle Jurassic (pre-Nevadan) regional metamorphism and thrust faulting within an active arc environment, Klamath Mountains, California , 1988 .

[15]  J. Saleeby,et al.  Composite Devonian island-arc batholith in the northern Sierra Nevada, California , 1988 .

[16]  M. Miller.  Dispersed remnants of a northeast Pacific fringing arc: Upper Paleozoic terranes of Permian McCloud Faunal affinity, western U.S. , 1987 .

[17]  P. Umhoefer.  Northward translation of “BAJA British Columbia” along the Late Cretaceous to Paleocene margin of western North America , 1987 .

[18]  J. Hannah,et al.  Isotopic age constraints on middle Paleozoic deformation in the northern Sierra Nevada, California , 1987 .

[19]  K. Crook,et al.  Trace element characteristics of graywackes and tectonic setting discrimination of sedimentary basins , 1986 .

[20]  B. C. Panuska.  Paleomagnetic evidence for a post-Cretaceous accretion of Wrangellia , 1985 .

[21]  G. J. Woodsworth,et al.  Paleomagnetic evidence for displacement from the south of the Coast Plutonic Complex, British Columbia , 1985 .

[22]  G. Wasserburg,et al.  A Nd and Sr isotopic study of the Trinity peridotite Implications for mantle evolution , 1984 .

[23]  P. Ward,et al.  Late Cretaceous (Santonian-Campanian) stratigraphy of the northern Sacramento Valley, California , 1984 .

[24]  R. Ingersoll.  Petrofacies and Provenance of Late Mesozoic Forearc Basin, Northern and Central California , 1983 .

[25]  G. Brakenridge,et al.  Provenance of North American Phanerozoic sandstones in relation to tectonic setting , 1983 .

[26]  J. E. Quick.  Petrology and petrogenesis of the Trinity peridotite, An upper mantle diapir in the eastern Klamath Mountains, northern California , 1981 .

[27]  R. Burmester,et al.  Paleomagnetism and tectonics of the Cretaceous Mt. Stuart Batholith of Washington: translation or tilt? , 1981 .

[28]  G. Bond,et al.  Pre-Upper Devonian Quartzose Sandstones in the Shoo Fly Formation Northern California-Petrology, Provenance and Implications for Regional Tectonics , 1980, The Journal of Geology.

[29]  R. Ingersoll.  Evolution of the Late Cretaceous forearc basin, northern and central California , 1979 .

[30]  D. Swanson,et al.  Triassic blueschist from northern California and north-central Oregon , 1977 .

[31]  J. Monger.  Upper Paleozoic rocks of the western Canadian Cordillera and their bearing on Cordilleran evolution , 1977 .

[32]  R. Armstrong,et al.  Rb-Sr and K-Ar geochronometry of Mesozoic granitic rocks and their Sr isotopic composition, Oregon, Washington, and Idaho , 1977 .

[33]  M. Beck.  Discordant paleomagnetic pole positions as evidence of regional shear in the western Cordillera of North America , 1976 .

[34]  D. Cowan,et al.  Early Mesozoic tectonic evolution of the western Sierra Nevada, California , 1975 .

[35]  M. Lanphere,et al.  Isotopic Age of the Nevadan Orogeny and Older Plutonic and Metamorphic Events in the Klamath Mountains, California , 1968 .

[36]  S. Wyld.  Reconstructing northern Cordilleran terranes along known Cretaceous and Cenozoic strike-slip faults: Implications for the Baja British Columbia hypothesis and other models , 2006 .

[37]  G. Gehrels,et al.  ZIRCON GEOCHRONOLOGY BY LASER-ABLATION MULTICOLLECTOR ICPMS AT THE ARIZONA LASERCHRON , 2006 .

[38]  Calvin G. Barnes,et al.  The development of tectonic concepts for the Klamath Mountains province, California and Oregon , 2006 .

[39]  G. Gehrels,et al.  A Moderate Translation Alternative to the Baja British Columbia Hypothesis , 2001 .

[40]  G. Gehrels,et al.  Provenance of the Antelope Mountain Quartzite, Yreka Terrane, California: Evidence for large-scale late Paleozoic sinistral displacement along the North American Cordilleran margin and implications for the mid-Paleozoic fringing-arc model , 2000 .

[41]  G. Gehrels,et al.  Detrital zircon geochronologic study of upper Paleozoic strata in the eastern Klamath terrane, northern California , 2000 .

[42]  G. Gehrels,et al.  Paleozoic and triassic paleogeography and tectonics of Western Nevada and Northern California , 2000 .

[43]  J. Wooden,et al.  Plutons and accretionary episodes of the Klamath Mountains, California and Oregon , 1999 .

[44]  M. J. Bas.  Using Geochemical Data: Evaluation, Presentation, Interpretation , 1994 .

[45]  T. Nilsen.  Stratigraphy of the Cretaceous Hornbrook Formation, southern Oregon and Northern California , 1993 .

[46]  J. Saleeby,et al.  Tectonic Relations Between the Galice Formation and the Condrey Mountain Schist, Klamath Mountains, Northern California , 1993 .

[47]  W. Ernst,et al.  Jurassic Orogeny in the Klamath Mountains: A Geochronological Analysis , 1993 .

[48]  R. Miller,et al.  Tectonic Evolution of Mesozoic Rocks in the Southern and Central Washington Cascades , 1993 .

[49]  B. Burchfiel,et al.  Tectonic overview of the Cordilleran orogen in the western United States: The Geology of North Ameri , 1992 .

[50]  David M. Miller,et al.  Late Cretaceous to early Eocene geologic evolution of the U.S. Cordillera , 1992 .

[51]  D. Cowan,et al.  Late Jurassic to early Late Cretaceous geology of the U.S. Cordillera , 1992 .

[52]  C. Rubin,et al.  Tectonic development of Cordilleran mid-Paleozoic volcano-plutonic complexes; Evidence for convergent margin tectonism , 1990 .

[53]  W. Irwin,et al.  Review of paleomagnetic data from the Klamath Mountains, Blue Mountains, and Sierra Nevada; Implications for paleogeographic reconstructions , 1990 .

[54]  N. Savage,et al.  Early Paleozoic stratigraphic, paleogeographic, and biogeographic relations of the eastern Klamath belt, northern California , 1990 .

[55]  J. Saleeby.  C-2 Central California Offshore to Colorado Plateau , 1986 .

[56]  Lewis C. Kleinhans,et al.  A Paleogeographic Reinterpretation of Some Middle Cretaceous Units, North-Central Oregon: Evidence for a Submarine Turbidite System , 1984 .

[57]  T. Nilsen.  Geology of the Upper Cretaceous Hornbrook Formation, Oregon and California; Frontmatter and Roadlogs , 1984 .

[58]  T. Nilsen,et al.  Conglomerate Clast Composition of the Upper Cretaceous Hornbrook Formation, Oregon and California , 1984 .

[59]  T. Nilsen,et al.  Sandstone Petrography of the Upper Cretaceous Hornbrook Formation, Oregon and California , 1984 .

[60]  P. C. Bateman.  A summary of critical relations in the central part of the Sierra Nevada batholith, California, U.S.A. , 1983 .