Insights into North American Paleogeography and Paleotectonics from U–Pb ages of detrital zircons in Mesozoic strata of the Colorado Plateau, USA

Dickinson, William R.; Gehrels, George E.

doi:10.1007/s00531-009-0462-0

Cited by 91 publications

(60 citation statements)

References 44 publications

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“…The ages of plutons in this southern arc segment correlate closely to the ages reported here for the SIS and Koip sequence ash-fl ow tuffs, but this segment may have been largely nonmarine, as plutons mostly intrude Paleoproterozoic cratonal basement. It seems likely that magmatism in both the northern and southern segments of the arc was ongoing by Middle Triassic time, and combining the plutonic, volcanic, and detrital zircon records suggests that magmatism probably commenced in both segments as early as earli- Dickinson and Gehrels, 2009;Riggs et al, 2009). The other known Triassic volcanic section, south of our study area, is the problematic section in the Mineral King pendant in the southern Sierra Nevada.…”

Section: Age and Tectonic Settingmentioning

confidence: 89%

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et al. 2011

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Granitic and volcanic rocks in the eastcentral Sierra Nevada, western UnitedStates, record the earliest stages of magmatism in the eastern Sierra Nevada magmatic arc, allowing us to examine magma sources and connections between plutonic and volcanic processes in the initial stages of arc construction. The Scheelite Intrusive Suite is one of the largest in the Sierra Nevada region, and is composed of the Wheeler Crest Granodiorite, granite of Lee Vining Canyon, and Pine Creek Granite. The Pb/U zircon ages from each unit of the suite suggest assembly between 226 and 218 Ma. The Scheelite Intrusive Suite is a high-K calcic or calc-alkalic suite, compositionally broadly similar to the nearby Late Cretaceous Tuolumne and John Muir Intrusive Suites, though plutons of the Scheelite Intrusive Suite are consistently Ca and Fe rich and lower in Na. Although Triassic granodiorites are isotopically quite similar to nearby Late Cretaceous intrusive suites, the trend toward more isotopically primitive granites is in contrast to the constant or more whole-rock radiogenic Sr trends observed in younger intrusive suites. Along the western margin of the Scheelite Intrusive Suite, the basal Mesozoic volcanic section in the Saddlebag Lake pendant includes silicic volcanic rocks that are in part coeval and potentially comagmatic with Triassic plutonic rocks. Widespread quartz-phyric ash-fl ow tuffs of Black Mountain, Saddlebag Lake, and Greenstone Lake yield Pb/U zircon ages of 232, 224, and 219 Ma, indicating that felsic ignimbrite volcanism commenced earlier and continued during emplacement of the 226-218 Ma Scheelite Intrusive Suite. Ash-fl ow tuffs are hydrothermally altered but have high fi eld strength element abundances and Nd isotopic compositions, suggesting affi nity to the relatively felsic parts of the Wheeler Crest Granodiorite and the granite of Lee Vining Canyon.

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Section: Age and Tectonic Settingmentioning

confidence: 89%

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“…2b) (Horton et al 2004;DeCelles & Coogan 2006;Lawton & Bradford 2011), although the Castlegate Sandstone also contains some recycled Cretaceous grains (sample CP34 of Dickinson & Gehrels 2010). Shallow-marine strata of the Star Point Sandstone and Blackhawk Formation comprise wave-dominated deltaic shoreline sandstones (e.g.…”

Section: Geological Contextmentioning

confidence: 99%

Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA

Hampson

2016

JGS

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Upper Cretaceous strata exposed in the Book Cliffs of east-central Utah are widely used as an archetype for the sequence stratigraphy of marginal-marine and shallow-marine deposits. Their stratal architectures are classically interpreted in terms of accommodation controls that were external to the sediment routing system (allogenic), and that forced the formation of flooding surfaces, sequence boundaries, and parasequence and parasequence-set stacking patterns. Processes internal to the sediment routing system (autogenic) and allogenic sediment supply controls provide alternatives that can plausibly explain aspects of the stratal architecture, including the following: (1) switching of wave-dominated delta lobes, expressed by the internal architecture of parasequences; (2) river avulsion, expressed by the internal architecture of multistorey fluvial sandbodies and related deposits; (3) avulsion-generated clustering of fluvial sandbodies in delta plain strata; (4) 'autoretreat' owing to increasing sediment storage on the delta plain as it lengthened during progradation, expressed by progradational-toaggradational stacking of parasequences; (5) sediment supply control on the stacking of, and sediment grain-size fractionation within, parasequence sets. The various potential allogenic controls and autogenic processes are combined to form a sequence stratigraphic solution set. This approach avoids anchoring of sequence stratigraphic interpretations on a specific control and acknowledges the non-unique origin of stratal architectures.

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“…An expanded U-Pb database for detrital zircon populations in widespread Jurassic eolianites and associated fl uvial and marine sandstones of the Colorado Plateau and adjoining regions supported that initial detrital zircon study (Dickinson and Gehrels, 2009). Analysis of the detrital zircon database suggests that the trunk stream of the transcontinental paleodrainage network had headwaters in the Atlantic rift uplift of the central and southern Appalachian region, where provenance relations are most favorable for derivation of the dominant detrital zircon subpopulations observed in plateau eolianites (Dickinson and Gehrels, 2010). The inferred trunk paleoriver traversed the continental interior along a path midway between uplands of the Archean Laurentian shield to the northeast and residual highlands of the Pennsylvanian Ancestral Rocky Mountains to the southwest (Fig.…”

Section: Introductionmentioning

confidence: 99%

Detrital zircons from fluvial Jurassic strata of the Michigan basin: Implications for the transcontinental Jurassic paleoriver hypothesis

Dickinson¹,

Gehrels²,

Marzolf³

2010

Geology

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The U-Pb age spectrum of detrital zircons in sandstone of the fl uvial Middle Jurassic Ionia Formation in the Michigan basin, United States, resembles the age spectra in Jurassic eolianites of the Colorado Plateau, except that a Neoproterozoic (725-510 Ma) subpopulation present in the eolianites is absent from the Michigan basin strata. The detrital zircon data are compatible with the hypothesis that the Ionia Formation was deposited by northern tributaries of a transcontinental Jurassic paleoriver system that transported detritus from headwaters in Atlantic rift highlands of the Appalachian region to fl oodplains and deltas in the present northern Rocky Mountains region. Previous detrital zircon studies have indicated that sedimented lowlands in that paleogeographic position were defl ated by paleowinds to feed eolian sand southward (in present coordinates) into the Colorado Plateau ergs (sand seas).

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Insights into North American Paleogeography and Paleotectonics from U–Pb ages of detrital zircons in Mesozoic strata of the Colorado Plateau, USA

Cited by 91 publications

References 44 publications

Untitled

Untitled

Towards a sequence stratigraphic solution set for autogenic processes and allogenic controls: Upper Cretaceous strata, Book Cliffs, Utah, USA

Detrital zircons from fluvial Jurassic strata of the Michigan basin: Implications for the transcontinental Jurassic paleoriver hypothesis

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