气候变化领域集成服务门户(CCPortal): Grain-Size Control on Detrital Zircon Cycloprovenance in the Late Paleozoic Paradox and Eagle Basins, USA

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DOI	10.1029/2019JB019226
	Grain-Size Control on Detrital Zircon Cycloprovenance in the Late Paleozoic Paradox and Eagle Basins, USA
	Leary R.J.; Smith M.E.; Umhoefer P.
发表日期	2020
ISSN	21699313
卷号	125 期号:7
英文摘要	Detrital zircon U-Pb data are routinely used to assess provenance in sedimentary systems. However, recent studies have suggested that zircon provenance interpretation may be biased by grain-size-dependent selective transport and deposition. In this study, we present zircon grain-size and U-Pb data from 11 sandstone and 11 mudstone samples from the late Paleozoic Eagle and Paradox basins to test whether apparent provenance changes between sandstone and mudstone samples can be explained by changes in zircon grain-size alone. The Eagle and Paradox basins formed in association with the Ancestral Rocky Mountains (ARM). These basins provide an excellent system to test grain-size/provenance relationships because they are filled with cyclic stratigraphy that records, via grain size and facies changes, flooding/exposure driven by interglacial/glacial cycles. These cycles are interpreted to have substantially altered sediment transport pathways and provenance of ARM-related sedimentary rocks. Data presented here suggest that although zircon grain size does correlate to sample grain size in most samples, age spectra appear to be independent of grain size. As such, differences in age spectra between sandstone and mudstone samples appear to be the result of changes in relative inputs of two endmember sources: (1) grains eroded from adjacent basement-cored ARM uplifts and (2) far-traveled sediment sourced from outside the ARM system. The data presented in this study also provide a successful proof-of-concept test for a manual method of determining zircon grain size. This method is simple and straightforward and can be applied to any sample analyzed using the Chromium off-line targeting software. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	cyclostratigraphy; detrital zircon; grain size; provenance
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187780
作者单位	Department of Earth and Environmental Science, New Mexico Institute of Mining and Technology, Socorro, NM, United States; School of Earth and Sustainability, Northern Arizona University, Flagstaff, AZ, United States
推荐引用方式 GB/T 7714	Leary R.J.,Smith M.E.,Umhoefer P.. Grain-Size Control on Detrital Zircon Cycloprovenance in the Late Paleozoic Paradox and Eagle Basins, USA[J],2020,125(7).
APA	Leary R.J.,Smith M.E.,&Umhoefer P..(2020).Grain-Size Control on Detrital Zircon Cycloprovenance in the Late Paleozoic Paradox and Eagle Basins, USA.Journal of Geophysical Research: Solid Earth,125(7).
MLA	Leary R.J.,et al."Grain-Size Control on Detrital Zircon Cycloprovenance in the Late Paleozoic Paradox and Eagle Basins, USA".Journal of Geophysical Research: Solid Earth 125.7(2020).