Geochemical data for Jurassic diabase associated with early Mesozoic basins in the Eastern United States; geologic setting, overview, and chemical methods used

Gottfried, David; Froelich, A.J.; Grossman, J.N.

doi:10.3133/ofr91322a

Cited by 5 publications

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References 20 publications

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“…4. Trace-element rare-earth element (REE) ratios (Y/Nb vs. Lu/ Hf) for CAMP basalts from the Moroccan High Atlas (Marzoli et al 2004) and Argana (Deenen et al 2010) basins and Newark (Gottfried et al 1991;Puffer et al 2009) and Fundy basins (Table 1). L. U, I.U, and U.U, respectively, indicate Lower, Intermediate, and Upper unit as defined in Morocco (Marzoli et al 2004).…”

Section: Chronostratigraphic Time Frame For the End-triassic Extinctionmentioning

confidence: 99%

The quest for chron E23r at Partridge Island, Bay of Fundy, Canada: CAMP emplacement postdates the end-Triassic extinction event at the North American craton

2011

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The Partridge Island stratigraphic section at the Bay of Fundy, Maritime Canada, reveals a continental sedimentary succession with the end-Triassic mass extinction level closely followed by basalts of the Central Atlantic Magmatic Province (CAMP). New Paleomagnetic data show that a short reverse magnetic polarity chron, correlative to E23r of the Newark Geomagnetic Polarity Time Scale (GPTS), is present below the extinction event. Organic carbon isotope data and basalt geochemistry further indicate that the onset of CAMP emplacement in the Bay of Fundy was roughly synchronous with emplacement in the Newark basin, but slightly postdates the oldest CAMP volcanism in Morocco by ∼20 ka. These results confirm the potential for long-distance CAMP correlations based on geochemical trace elements, indicate substantiate provincialism of latest Triassic palynoflora, and suggest a very concise period (<<100 ka) of CAMP emplacement in the northern Atlantic region.

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