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Colorado Plateau Coring Project, Phase I (CPCP-I): A continuously cored, globally exportable chronology of Triassic continental environmental change from western North America

Colorado Plateau Coring Project, Phase I (CPCP-I): A continuously cored, globally exportable chronology of Triassic continental environmental change from western North America
Colorado Plateau Coring Project, Phase I (CPCP-I): A continuously cored, globally exportable chronology of Triassic continental environmental change from western North America

Phase 1 of the Colorado Plateau Coring Project (CPCP-I) recovered a total of over 850m of stratigraphically overlapping core from three coreholes at two sites in the Early to Middle and Late Triassic age largely fluvial Moenkopi and Chinle formations in Petrified Forest National Park (PFNP), northeastern Arizona, USA. Coring took place during November and December of 2013 and the project is now in its post-drilling science phase. The CPCP cores have abundant detrital zircon-producing layers (with survey LA-ICP-MS dates selectively resampled for CA-ID-TIMS U-Pb ages ranging in age from at least 210 to 241 Ma), which together with their magnetic polarity stratigraphy demonstrate that a globally exportable timescale can be produced from these continental sequences and in the process show that a prominent gap in the calibrated Phanerozoic record can be filled. The portion of core CPCP-PFNP13-1A for which the polarity stratigraphy has been completed thus far spans ~ 215 to 209Ma of the Late Triassic age, and strongly validates the longer Newark-Hartford Astrochronostratigraphic-calibrated magnetic Polarity Time-Scale (APTS) based on cores recovered in the 1990s during the Newark Basin Coring Project (NBCP). Core recovery was ~ 100% in all holes (Table 1). The coreholes were inclined ~ 60-75° approximately to the south to ensure azimuthal orientation in the nearly flat-lying bedding, critical to the interpretation of paleomagentic polarity stratigraphy. The two longest of the cores (CPCP-PFNP13-1A and 2B) were CT-scanned in their entirety at the University of Texas High Resolution X-ray CT Facility in Austin, TX, and subsequently along with 2A, all cores were split and processed at the CSDCO/LacCore Facility, in Minneapolis, MN, where they were scanned for physical property logs and imaging. While remaining the property of the Federal Government, the archive half of each core is curated at the NSF-sponsored LacCore Core Repository and the working half is stored at the Rutgers University Core Repository in Piscataway, NJ, where the initial sampling party was held in 2015 with several additional sampling events following. Additional planned study will recover the rest of the polarity stratigraphy of the cores as additional zircon ages, sedimentary structure and paleosol facies analysis, stable isotope geochemistry, and calibrated XRF core scanning are accomplished. Together with strategic outcrop studies in Petrified Forest National Park and environs, these cores will allow the vast amount of surface paleontological and paleoenvironmental information recorded in the continental Triassic of western North America to be confidently placed in a secure context along with important events such as the giant Manicouagan impact at ~ 215:5 Ma (Ramezani et al., 2005) and long wavelength astronomical cycles pacing global environmental change and trends in atmospheric gas composition during the dawn of the dinosaurs.

1816-8957
15-40
Olsen, Paul E.
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Geissman, John W.
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Kent, Dennis V.
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Gehrels, George E.
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Mundil, Roland
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Irmis, R.
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Lepre, Christopher
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Rasmussen, Cornelia
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Giesler, Dominique
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Parker, William G.
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Zakharova, N.
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Kürschner, Wolfram M.
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Miller, Charlotte
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Baranyi, Viktoria
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Schaller, M.
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Whiteside, Jessica H.
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Schnurrenberger, Douglas
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Noren, Anders
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Shannon, Kristina Brady
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O'Grady, Ryan
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Colbert, Matthew W.
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Maisano, Jessie
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Edey, David
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Kinney, Sean T.
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Molina-Garza, Roberto
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Bachman, Gerhard H.
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Sha, Jingeng
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the CPCD team
Olsen, Paul E.
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Geissman, John W.
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Kent, Dennis V.
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Gehrels, George E.
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Mundil, Roland
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Irmis, R.
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Lepre, Christopher
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Rasmussen, Cornelia
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Giesler, Dominique
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Parker, William G.
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Zakharova, N.
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Kürschner, Wolfram M.
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Miller, Charlotte
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Baranyi, Viktoria
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Schaller, M.
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Whiteside, Jessica H.
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Schnurrenberger, Douglas
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Noren, Anders
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Shannon, Kristina Brady
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O'Grady, Ryan
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Colbert, Matthew W.
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Maisano, Jessie
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Edey, David
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Kinney, Sean T.
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Molina-Garza, Roberto
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Bachman, Gerhard H.
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Sha, Jingeng
d1a4e47e-1ef1-44e7-a48c-d0bc2f2e67fc

Olsen, Paul E., Geissman, John W., Kent, Dennis V., Gehrels, George E., Mundil, Roland, Irmis, R., Lepre, Christopher, Rasmussen, Cornelia, Giesler, Dominique, Parker, William G., Zakharova, N., Kürschner, Wolfram M., Miller, Charlotte, Baranyi, Viktoria, Schaller, M., Whiteside, Jessica H., Schnurrenberger, Douglas, Noren, Anders, Shannon, Kristina Brady, O'Grady, Ryan, Colbert, Matthew W., Maisano, Jessie, Edey, David, Kinney, Sean T., Molina-Garza, Roberto, Bachman, Gerhard H. and Sha, Jingeng , the CPCD team (2018) Colorado Plateau Coring Project, Phase I (CPCP-I): A continuously cored, globally exportable chronology of Triassic continental environmental change from western North America. Scientific Drilling, 24, 15-40. (doi:10.5194/sd-24-15-2018).

Record type: Article

Abstract

Phase 1 of the Colorado Plateau Coring Project (CPCP-I) recovered a total of over 850m of stratigraphically overlapping core from three coreholes at two sites in the Early to Middle and Late Triassic age largely fluvial Moenkopi and Chinle formations in Petrified Forest National Park (PFNP), northeastern Arizona, USA. Coring took place during November and December of 2013 and the project is now in its post-drilling science phase. The CPCP cores have abundant detrital zircon-producing layers (with survey LA-ICP-MS dates selectively resampled for CA-ID-TIMS U-Pb ages ranging in age from at least 210 to 241 Ma), which together with their magnetic polarity stratigraphy demonstrate that a globally exportable timescale can be produced from these continental sequences and in the process show that a prominent gap in the calibrated Phanerozoic record can be filled. The portion of core CPCP-PFNP13-1A for which the polarity stratigraphy has been completed thus far spans ~ 215 to 209Ma of the Late Triassic age, and strongly validates the longer Newark-Hartford Astrochronostratigraphic-calibrated magnetic Polarity Time-Scale (APTS) based on cores recovered in the 1990s during the Newark Basin Coring Project (NBCP). Core recovery was ~ 100% in all holes (Table 1). The coreholes were inclined ~ 60-75° approximately to the south to ensure azimuthal orientation in the nearly flat-lying bedding, critical to the interpretation of paleomagentic polarity stratigraphy. The two longest of the cores (CPCP-PFNP13-1A and 2B) were CT-scanned in their entirety at the University of Texas High Resolution X-ray CT Facility in Austin, TX, and subsequently along with 2A, all cores were split and processed at the CSDCO/LacCore Facility, in Minneapolis, MN, where they were scanned for physical property logs and imaging. While remaining the property of the Federal Government, the archive half of each core is curated at the NSF-sponsored LacCore Core Repository and the working half is stored at the Rutgers University Core Repository in Piscataway, NJ, where the initial sampling party was held in 2015 with several additional sampling events following. Additional planned study will recover the rest of the polarity stratigraphy of the cores as additional zircon ages, sedimentary structure and paleosol facies analysis, stable isotope geochemistry, and calibrated XRF core scanning are accomplished. Together with strategic outcrop studies in Petrified Forest National Park and environs, these cores will allow the vast amount of surface paleontological and paleoenvironmental information recorded in the continental Triassic of western North America to be confidently placed in a secure context along with important events such as the giant Manicouagan impact at ~ 215:5 Ma (Ramezani et al., 2005) and long wavelength astronomical cycles pacing global environmental change and trends in atmospheric gas composition during the dawn of the dinosaurs.

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sd-24-15-2018 - Version of Record
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Accepted/In Press date: 3 September 2018
e-pub ahead of print date: 22 October 2018
Published date: 22 October 2018

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Local EPrints ID: 425974
URI: http://eprints.soton.ac.uk/id/eprint/425974
ISSN: 1816-8957
PURE UUID: 1d3b5a68-ba45-4cfe-ad2e-dbbcbb2cf2ab

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Date deposited: 08 Nov 2018 17:30
Last modified: 07 Oct 2020 00:36

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Contributors

Author: Paul E. Olsen
Author: John W. Geissman
Author: Dennis V. Kent
Author: George E. Gehrels
Author: Roland Mundil
Author: R. Irmis
Author: Christopher Lepre
Author: Cornelia Rasmussen
Author: Dominique Giesler
Author: William G. Parker
Author: N. Zakharova
Author: Wolfram M. Kürschner
Author: Charlotte Miller
Author: Viktoria Baranyi
Author: M. Schaller
Author: Douglas Schnurrenberger
Author: Anders Noren
Author: Kristina Brady Shannon
Author: Ryan O'Grady
Author: Matthew W. Colbert
Author: Jessie Maisano
Author: David Edey
Author: Sean T. Kinney
Author: Roberto Molina-Garza
Author: Gerhard H. Bachman
Author: Jingeng Sha
Corporate Author: the CPCD team

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