Precambrian zircons from the Florida basement: A Gondwanan connection

Mueller, Paul A.; Heatherington, Ann L.; Wooden, Joseph L.; Shuster, Robert Duncan; Nutman, Allen P.; Williams, Ian S.

doi:10.1130/0091-7613(1994)022<0119:pzftfb>2.3.co;2

Cited by 86 publications

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“…Provenance studies on sedimentary rocks based on the morphological and U/ Pb geochronological analysis of detrital zircons have proven useful in some cases (Mueller et al, 1994;Murphy et al, 2004;Samson et al, 2005). The technique provides estimates on the maximum depositional age and establishes characteristics of sediment source areas including age and composition.…”

Section: Introductionmentioning

confidence: 99%

Detrital zircon analysis from the Neoproterozoic–Cambrian sedimentary cover (Cuyania terrane), Sierra de Pie de Palo, Argentina: Evidence of a rift and passive margin system?

Naipauer

Vujovich

Cingolani

et al. 2010

Journal of South American Earth Sciences

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Section: Introductionmentioning

confidence: 99%

Detrital zircon analysis from the Neoproterozoic–Cambrian sedimentary cover (Cuyania terrane), Sierra de Pie de Palo, Argentina: Evidence of a rift and passive margin system?

Naipauer

Vujovich

Cingolani

et al. 2010

Journal of South American Earth Sciences

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“…Confirmation of a suture between the West African craton and Laurentia ( Fig. 3) came with determination of ages of subsurface crystalline rocks in cores recovered from beneath the Coastal Plain in northern Florida (e.g., Heatherington et al, 1996Mueller et al, 1994;Mueller, 1999, 2003). The cover sedimentary rocks are not metamorphosed and crystalline rocks are lithologically similar to rocks of the same age in West Africa (e.g., Dallmeyer, 1987).…”

Section: Introductionmentioning

confidence: 99%

“…With application of plate-tectonic models to the Appalachians (e.g., Bird and Dewey, 1970;Hatcher, 1972) came the realization that rifted or marginal fragments along the eastern geographic part of the Grenville orogen were involved in Appalachian orogensis. Some other older Precambrian fragments, including much of northern and central Florida and southernmost Georgia and Alabama, are now known to be pieces of Africa (e.g., Pojeta et al, 1976;Mueller et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

The Grenville orogenic cycle of southern Laurentia: Unraveling sutures, rifts, and shear zones as potential piercing points for Amazonia

Bartholomew¹,

Hatcher²

2010

Journal of South American Earth Sciences

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“…In Alabama, the Suwannee terrane contains felsic volcanic rocks intruded by granodiorite that are overlain by Lower Ordovician through Devonian sedimentary rocks containing Gondwanan faunal assemblages (Applin, 1951;Barnett, 1975;Neathery and Thomas, 1975;Pojeta et al, 1976;Chowns and Williams, 1983;Guthrie and Raymond, 1992;Mueller et al, 1994Mueller et al, , 1996.…”

Section: Laurentian Gondwanan P E R I -G O N D W a N A Nmentioning

confidence: 99%

Untitled

et al. 2013

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We dedicate this paper to the memory of coauthor Isidore (Izzy) Zietz, who died at age 93 while this paper was in review. After contributing to the early theoretical foundation for analysis of airborne magnetic surveys, Izzy became a leading advocate for aeromagnetic survey acquisition and interpretation throughout the U.S., combining surveys into regional, state, and national maps, and working with regional geologists in interpreting geophysical anomalies. Like many geologists, we have been energized by Izzy's contagious enthusiasm for using magnetic and gravity anomalies to delineate and characterize major tectonic features. Lessons from working with him on data from Alabama and elsewhere over the years will continue to infl uence our appreciation and understanding of aeromagnetic and gravity anomalies for interpreting the Earth's upper crust."Magnetics is never good, and gravity is even worse!" "…all of it can just be dashed." -Isidore Zietz ABSTRACT Aeromagnetic and gravity data sets obtained for Alabama (United States) have been digitally merged and fi ltered to enhance upper-crustal anomalies. Beneath the Appalachian Basin in northwestern Alabama, broad deep-crustal anomalies of the continental interior include the Grenville front and New York-Alabama lineament (dextral fault). Toward the east and south, high-angle discordance between the northeast-trending Appalachians and the east-west-trending wedge of overlapping Mesozoic and Cenozoic Gulf Coastal Plain sediments reveals how bedrock geophysical signatures progressively change with deeper burial. Highfrequency magnetic anomalies in the Appalachian deformed domain (ADD) correspond to amphibolites and mylonites outlining terranes, while broader, lower-amplitude domains include Paleozoic intrusive bodies and Grenville basement gneiss. Fundamental ADD structures (e.g., the Alexander City, Towaliga, and Goat Rock-Bartletts Ferry faults) can be traced southward beneath the Gulf Coastal Plain to the suture with Gondwanan crust of the Suwannee terrane. Within the ADD, there is clear magnetic distinction between Laurentian crust and the strongly linear, high-frequency magnetic highs of peri-Gondwanan (Carolina-Uchee) arc terranes. The contact (Central Piedmont suture) corresponds to surface exposures of the Bartletts Ferry fault. ADD magnetic and gravity signatures are truncated by the eastwest-trending Altamaha magnetic low associated with the Suwannee suture. Arcuate northeast-trending magnetic linears of the Suwannee terrane refl ect internal structure and Mesozoic failed-rift trends. Geophysical data can be used to make inferences on surface and subsurface geology and vice versa, which has applicability anywhere that bedrock is exposed or concealed beneath essentially non-magnetic sedimentary cover.

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Precambrian zircons from the Florida basement: A Gondwanan connection

Cited by 86 publications

References 0 publications

Detrital zircon analysis from the Neoproterozoic–Cambrian sedimentary cover (Cuyania terrane), Sierra de Pie de Palo, Argentina: Evidence of a rift and passive margin system?

Detrital zircon analysis from the Neoproterozoic–Cambrian sedimentary cover (Cuyania terrane), Sierra de Pie de Palo, Argentina: Evidence of a rift and passive margin system?

The Grenville orogenic cycle of southern Laurentia: Unraveling sutures, rifts, and shear zones as potential piercing points for Amazonia

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