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Showing 1 to 20 of 58 for “"detrital zircon"”.
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Detrital Zircon Analysis of Permian Victoria Group Sandstones, Transantarctic Mountains, Antarctica
… data indicate that this basin had two major detrital sources, a cratonic source and a volcaniclastic source that characterizes the upper Buckley Formation and younger Triassic beds. In order to investigate the sedimentary provenance further, detrital zircons have been examined from both …
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The Global Detrital Zircon Database: Quantifying the Timing and Rate of Crustal Growth
Published detrital zircon geochronological data was compiled to form the Global Detrital Zircon Database (GDZDb). This database provides a reference block for provenance analysis by future detrital zircon geochronological studies. This project entailed three subprojects: 1. crustal growth/crustal …
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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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INNOVATIVE AND CONVENTIONAL APPROACHES TO DETRITAL ZIRCON PROVENANCE ANALYSIS: LOOKING TO THE PAST, PRESENT, AND FUTURE
<p>Detrital provenance analysis is an important tool in our understanding paleo-fluvial drainages, erosion of landscapes, paleogeographic reconstructions, and regional geologic and tectonic histories. Here, we examine the utility of multiple provenance analysis techniques through their application …
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DETRITAL-ZIRCON GEOCHRONOLOGIC PROVENANCE ANALYSES THAT TEST AND EXPAND THE EAST SIBERIA - WEST LAURENTIA RODINIA RECONSTRUCTION
… quantitatively test correlations, we determined detrital-zircon age spectra from samples from the Sette Daban Range of SE Siberia and the Death Valley and White-Inyo regions of SW Laurentia using SHRIMP and LAICPMS. Data indicate that several Siberian samples contain zircons correlative with …
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DETRITAL-ZIRCON GEOCHRONOLOGIC PROVENANCE ANALYSES THAT TEST AND EXPAND THE EAST SIBERIA - WEST LAURENTIA RODINIA RECONSTRUCTION
… quantitatively test correlations, we determined detrital-zircon age spectra from samples from the Sette Daban Range of SE Siberia and the Death Valley and White-Inyo regions of SW Laurentia using SHRIMP and LAICPMS. Data indicate that several Siberian samples contain zircons correlative with …
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Paleogeography of Western North America: Insights from Detrital Zircon U-Pb Geochronology and Hf Isotope Geochemistry
… geochronology and Hf isotope geochemistry of detrital zircons, as well as, geologic mapping and paleocurrent analysis. The Neoproterozoic through Pennsylvanian Yukon-Tanana terrane (YTTs) in the Coast Mountains of southeastern Alaska, the Cretaceous through Eocene strata in the San Juan basin …
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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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RECONSTRUCTING PAST ANTARCTIC ICE FLOW PATHS IN THE ROSS EMBAYMENT, ANTARCTICA USING SAND PETROGRAPHY, PARTICLE SIZE AND DETRITAL ZIRCON PROVENANCE
… Ross Sea. Particle size, sand petrography, and detrital zircons were used to provide new information on the subglacial geology of Antarctica, as well as assisting in the reconstruction of Last Glacial Maximum (LGM) ice flow paths. Statistical analyses using the Kolmogorov-Smirnov (K-S test) …
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Reconstructing late-pleistocene climatic and glacial history of central North America using loess-derived land snail stable isotopes and detrital zircon provenance
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Timing and drivers of exhumation in the hinterland of the North American Cordillera from detrital zircon U-Pb and (U-Th)/He double-dating
… clues to its development. A total of 2,163 new detrital zircon U-Pb ages were obtained from 16 samples to confirm the published provenance of the sandstones and/or recover new grain-age populations. The U-Pb ages reveal the major sources for zircons: Permian-Triassic, Jurassic, and Cretaceous …
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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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Syntectonic deposition and paleohydrology of the spring-fed Hualapai Limestone and implications for 5-6 MA integration of the Colorado River system through Grand Canyon : evidence from sedimentology, geochemistry and detrital zircon analysis
… includes new geochemistry, tephrochronology, and detrital zircon analysis to examine variations of the sedimentary and tectonic records from the Hualapai Limestone basins. Thickness variations, with progressively thicker deposits towards the east in two of the four basins, indicate syntectonic …
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Provenance and Tectonic Implications of LA-ICP-MS Zircon Depth-Profiling, Nanaimo Basin, British Columbia, Canada
Detrital zircon studies from sedimentary rocks of the Nanaimo Basin provide an important independent test of the Late Cretaceous paleogeographic position for the basin, and the associated Insular Superterrane, Coast Plutonic Complex (CPC), and North Cascades of the North American Cordillera. …
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Sediment incorporation into continental arc systems and paleogeography of the western North American Cordillera: Insights from the North Cascades, Washington
… sedimentary-provenance information recorded in detrital-zircon U-Pb and Hf-isotope and whole-rock Nd-isotope analyses of (meta)sedimentary rocks from northwestern Washington and southern British Columbia, in conjunction with similar datasets from coeval (meta)sedimentary rocks to the south along …
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CONTRASTING PROCESSES OF DEPOSITION IN THE LATE CRETACEOUS PANTHER TONGUE SANDSTONE OF CENTRAL UTAH: THE ROLE OF AUTOGENIC VERSUS ALLOGENIC PROCESSES, AND THE IMPORTANCE OF HYPERPYCNAL FLOW
… west. These results are then linked to published detrital zircon U-Pb geochronological and provenance data from Late Cretaceous strata within the study area that show multiple, long-lived transverse river systems flowed from highlands of the Sevier Fold and Thrust Belt to the Western Interior …
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Sedimentary basin evolution and structural compartmentalization in the northernmost Andes : Eastern Cordillera and Magdalena Valley, Colombia
… with significant lateral variations. New detrital zircon U-Pb geochronological data across the unconformity reveals stepwise provenance changes in response to the transition from post-extensional (thermal) to foreland basin (flexural) subsidence. The latest Cretaceous to late Eocene shift …
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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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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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Geodynamic Development of the South China Block from Precambrian to Cretaceous: Constraints from Geology Geochemistry and Geochronology
… ~1000 Ma and ~100 Ma. Compiled data include: zircon geochronology data, whole rock Lu-Hf isotope data, whole rock Sm-Nd and Rb-Sr isotopes data, rock major and trace element data. Geochronology data concentrate on U-Pb zircon and monazite data for the crystallisation ages of igneous rocks and …
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