Výsledky vyhledávání - "Arthur J. Merschat"

Tectonics, geochronology, and petrology of the Walker Top Granite, Appalachian Inner Piedmont, North Carolina (USA): Implications for Acadian and Neoacadian orogenesis

Autor: Arthur J. Merschat, Robert D. Hatcher, Scott D. Giorgis, Heather E. Byars, Russell W. Mapes, Crystal G. Wilson, Matthew P. Gatewood

Publikováno v: Geosphere. 19:19-46

The Walker Top Granite (here formally named) is a peraluminous megacrystic granite that occurs in the Cat Square terrane, Inner Piedmont, part of the southern Appalachian Acadian-Neoacadian deformational and metamorphic core. The granite occurs as di

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5afdf76c87e6e307f8e45b8a8fb6e288
https://doi.org/10.1130/ges02315.1

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Don't judge an orogen by its cover: Kinematics of the Appalachian décollement from seismic anisotropy

Autor: Michael G. Frothingham, Vera Schulte-Pelkum, Kevin H. Mahan, Arthur J. Merschat, Makayla Mather, Zulliet Cabrera Gomez

Publikováno v: Geology. 50:1306-1311

As North America collided with Africa to form Pangea during the Alleghanian orogeny, crystalline and sedimentary rocks in the southeastern United States were thrust forelandward along the Appalachian décollement. We examined Ps receiver functions to

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::14bd723149b1053aa91774a1b9c1d365
https://doi.org/10.1130/g50323.1

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Akademický článek

Photoluminescence Imaging of Whole Zircon Grains on a Petrographic Microscope—An Underused Aide for Geochronologic Studies

Autor: Ryan J. McAleer, Aaron M. Jubb, Paul C. Hackley, Gregory J. Walsh, Arthur J. Merschat, Sean P. Regan, William C. Burton, Jorge A. Vazquez

Publikováno v: Minerals, Vol 10, Iss 10, p 876 (2020)

The refractory nature of zircon to temperature and pressure allows even a single zircon grain to preserve a rich history of magmatic, metamorphic, and hydrothermal processes. Isotopic dating of micro-domains exposed in cross-sections of zircon grains

Externí odkaz: https://doaj.org/article/f85dcfd33eb64068bf2a5cf8f4e64446

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Geochronology of the Oliverian Plutonic Suite and the Ammonoosuc Volcanics in the Bronson Hill arc: Western New Hampshire, USA

Autor: Ryan J. McAleer, Peter M. Valley, Gregory J. Walsh, Arthur J. Merschat

Publikováno v: Geosphere. 16:229-257

U-Pb zircon geochronology by sensitive high-resolution ion microprobe–reverse geometry (SHRIMP-RG) on 11 plutonic rocks and two volcanic rocks from the Bronson Hill arc in western New Hampshire yielded Early to Late Ordovician ages ranging from 475

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c710a523733223a358ccacaa2066f46e
https://doi.org/10.1130/ges02170.1

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Geologic evidence for an icehouse Earth before the Sturtian global glaciation

Autor: Scott A. Maclennan, Adam C. Maloof, Blair Schoene, Michael P. Eddy, Peter W. Crockford, C. Scott Southworth, Akshay Mehra, Arthur J. Merschat

Publikováno v: Science Advances

Tropical glaciers imply that Earth was already cold before the first Neoproterozoic Snowball Earth.
Snowball Earth episodes, times when the planet was covered in ice, represent the most extreme climate events in Earth’s history. Yet, the mecha

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5cbfa3796a6ff8ba7c82acd0546e8fb
http://europepmc.org/articles/PMC7286673

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