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Showing 1 to 10 of 10 for “"Detrital zircon geochronology"”.
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Characterizing Provenance of the Late Wisconsinan Rainy Lobe Using Fine-Fraction Geochemistry and Detrital Zircon Geochronology
… mixing models, till matrix geochemistry, and detrital zircon geochronology. The multicomponent mixing model is developed to examine sedimentological variability by incorporation of older, underlying tills (e.g. Goldstein, 1989). The mixing model shows that the Hewitt till does not lie on the …
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Detrital zircon geochronology of the Upper Miocene Boleo Formation in the Santa Rosalia, Baja California Sur, Mexico
… age is poorly constrained. We carried out a U-Pb detrital zircon study of the Boleo Formation to constrain its maximum depositional age. The Boleo Formation has basal limestone and gypsum sections that may be time transgressive. These are overlain by a much thicker clastic sequence, with …
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EPISODIC UPLIFT OF THE ROCKY MOUNTAINS: EVIDENCE FROM U-PB DETRITAL ZIRCON GEOCHRONOLOGY AND LOW-TEMPERATURE THERMOCHRONOLOGY WITH A CHAPTER ON USING MOBILE TECHNOLOGY FOR GEOSCIENCE EDUCATION
… studies include incision studies (Chapter 1), detrital zircon analysis of Cenozoic fluvial deposits resting on the Rocky Mountain Erosion Surface (Chapter 2), and low temperature apatite fission track (AFT) and U-Th/He (AHe) low temperature thermochronology to look at differential cooling …
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Aspects of Cyclic Sedimentation in the Upper Mississippian, Mauch Chunk Group, southern West Virginia and southwest Virginia
… Drainage area estimates are consistent with detrital zircon geochronology and petrographic data and suggest that the Stony Gap and Ravencliff incised-valley fills were derived from distal, northern and northwestern cratonic sources that dispersed sediment into NE-SW-oriented, longitudinal …
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Provenance of the ice-cored moraine at Mt. Achernar, Law Glacier, Antarctica
… through time and space. Pebble lithology, detrital zircon geochronology, and till geochemistry were analyzed on samples from a 6.5 km transect. Hummocky topography occurs with the most recently exposed material along the active ice margin (Zone 1), followed by a relatively flat and low …
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Insights Into the Stratigraphic Evolution of the Early Pennsylvanian Pocahontas Basin, Virginia
… average duration of ~80 kyr based on available geochronology. Glacioeustatic control on stratigraphic architecture is supported by corresponding sequence duration within the short-eccentricity periodicity of the Milankovitch band, as well as the magnitude and extent of rapid facies shifts, …
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Triassic to Neogene Evolution of the Andean Retroarc: Neuquén Basin, Argentina
… This study presents new sedimentological and detrital zircon U-Pb data from the Jurassic to latest Cretaceous sedimentary strata to determine depositional environments, stratigraphic relations, provenance, and maximum depositional ages of these units and ultimately evaluate the role of …
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Geochemistry and Basin Analysis of Laramide Rocky Mountain Basins
… Eocene. In addition it uses the sedimentology, detrital zircon U-Pb geochronology, and isotope paleoaltimetry of early Eocene sedimentary strata to constrain the tectonic setting, paleogeography and paleoclimate of the Wind River basin. Annual and seasonal variation in ancient riverwater δ¹⁸O …
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Stratigraphic response to Cordilleran processes along the south central Andean margin
… margin of Argentina. Chapter 1 applies detrital zircon U-Th-Pb and Lu-Hf isotopic datasets as a powerful methods for evaluating long-term, regional geologic patterns and the processes of crustal addition, removal, and recycling to help resolve the onset of Andean subduction, and the …
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Stratigraphy and Tectonics: Multi-Disciplinary Evaluation of Tectonic Models For the Eastern and Southern Continental Margins of North America
… history. The distribution of single-grain detrital-zircon ages collected from the Upper Ordovician through upper Mississippian sandstones records the sedimentary response to Taconic, Acadian and Alleghanian phases of orogenesis. This analysis suggests the Late Ordovician accretion of …