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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 67 (1983)

Issue: 9. (September)

First Page: 1469

Last Page: 1469

Title: Tectonic Implications of Paleozoic and Mesozoic Igneous Rocks in Subsurface of Peninsular Florida: ABSTRACT

Author(s): Paul A. Mueller, Jon W. Porch

Article Type: Meeting abstract


The extensive Mesozoic and Cenozoic sedimentary sequences of peninsular Florida rest unconformably upon a basement of dominantly volcanic rocks. Major and trace element analyses of samples from six deep oil test wells in north-central and south-central peninsular Florida suggest the existence of two distinct volcanic provinces. The northern province contains calc-alkalic andesitic to rhyolitic rocks similar to those found along modern convergent (ocean-continent) plate boundaries. The southern province is apparently a bimodal suite of basaltic and rhyolitic rocks. These rocks exhibit certain geochemical features which suggest they were generated in a continental rifting environment associated with a mantle plume. Available age data indicate the northern volcanic province s at least early Paleozoic in age, whereas the volcanism in the south occurred during early Mesozoic.

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