Stratigraphy and geochemistry of the Catoctin volcanics: Implications for mantle evolution during the breakup of Rodinia

Badger, Robert L.; Ashley, Kyle T.; Cousens, Brian

doi:10.1130/2010.1206(17)

Cited by 5 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nd model ages of the PMUB correlate closely with the age of the Rodinia break-up and opening of the Iapetus Ocean along the Blue Ridge Rift of southeastern Laurentia (572 ± 5 to 564 ± 9 Ma; Aleinikoff et al 1995). In particular, Neoproterozoic-Cambrian mafic rocks from the PMUB and those from the Catoctin Formation and the Southern Oklahoma Aulacogen in North America seem to be contemporaneous and share a similar plume-enriched mantle source or an old recycled enriched Laurentian component (Fullagar et al 1997;Badger et al 2010;Brueseke et al 2016). This similarity, as well as Nd-Hf-Pb similarities between basement rocks from Cuyania and Chilenia (Jacques et al 2020), may support the theory that both terranes derive from Laurentia.…”

Section: A Assessment Of Crustal Contamination and Mantle Sourcementioning

confidence: 52%

“…In particular, samples lying over or near the depleted mantle evolution curve exhibit only slight or poor crustal contamination. Nd isotope composition of the studied mafic rocks is comparable with that of Neoproterozoic-Cambrian mafic rocks from the Catoctin Formation in the Blue Ridge Mountains of the central Appalachians, southern Appalachians and the Southern Oklahoma Aulacogen in the current North American Plate (Fullagar et al 1997;Badger et al 2010;Brueseke et al 2016). The Neoproterozoic rift-related magmas from eastern North America have been attributed to the interaction of a plume with the subcontinental lithospheric mantle (Puffer, 2002) or a mantle plume that incorporated an eclogite component from subducted mantle slabs (Badger & Sinha, 2004).…”

Section: A Assessment Of Crustal Contamination and Mantle Sourcementioning

confidence: 54%

“…Lithospheric weakness may derive from a regional extension and intra-continental rifting associated with the Neoproterozoic magmatism (e.g. the Catoctin flood basalts at c. 570-565 Ma; Badger & Sinha, 1988;Badger et al 2010).…”

Section: B Tectonic Implicationsmentioning

confidence: 99%

“…The pink shaded area indicates the field for mafic and ultramafic protoliths from the Pie de Palo basement and Pie de Palo Complex (Kay et al 1996;Rapela et al 2010). Samples from the Catoctin Formation (Badger et al 2010) and from Southern Oklahoma Aulacogen (Brueseke et al 2016) are shown for comparison.…”

Section: B Tectonic Implicationsmentioning

confidence: 99%

See 3 more Smart Citations

The Cuyano proto-ocean between the Chilenia and Cuyania terranes: rifting and plume interaction during the Neoproterozoic – early Palaeozoic evolution of the SW Gondwana margin

et al. 2021

View full text Add to dashboard Cite

The Precordillera mafic–ultramafic belt (PMUB), located in central-western Argentina, comprises mafic and ultramafic bodies interlayered and/or in tectonic contact with marine siliciclastic units. Whole-rock, mineral geochemistry and Nd–Sr isotope analyses performed in magmatic rocks suggest a relatively different spatial and temporal evolution along the belt. The southern PMUB (south of 32° S) evolved as an intra-continental rifted margin with an enriched mid-ocean-ridge basalt (E-MORB) tholeiitic to alkaline magmatism, to a proto-ocean basin (the Cuyano proto-ocean) with tholeiitic normal-MORB geochemical signature. Based on neodymium model ages (TDM), the magmatic activity started during the late Neoproterozoic Era and continued into the early Palaeozoic Era. Instead, the northern PMUB (28–32° S) evolved as an intra-continental rifted margin with dominant tholeiitic E-MORB to continental flood basalt (CFB) magmatism during the early Palaeozoic Era. ϵNd values (+3.4 to +8.4), rare earth element trends and high-field-strength element systematics, together with an estimated potential mantle temperature of c. 50–100°C above ambient mantle, suggest the PMUB magmatism derived from an enriched mantle source related to the effect of a rising plume linked to the Iapetus Ocean opening. In particular, TDM estimations of 600–550 Ma agree with reported magmatism in central to southern Appalachians. The magmatism in the PMUB, and those registered in the Neoproterozoic Catoctin Formation and in the Southern Oklahoma Aulacogen in the conjugated Laurentian margin, seem to be contemporaneous, sharing a similar plume-enriched mantle source. In this context, the E-MORB signature identified along the PMUB can be described as a plume-distal ridge tectonic setting over an extended margin.

show abstract

Section: A Assessment Of Crustal Contamination and Mantle Sourcementioning

confidence: 52%

Section: A Assessment Of Crustal Contamination and Mantle Sourcementioning

confidence: 54%

Section: B Tectonic Implicationsmentioning

confidence: 99%

Section: B Tectonic Implicationsmentioning

confidence: 99%

See 2 more Smart Citations

The Cuyano proto-ocean between the Chilenia and Cuyania terranes: rifting and plume interaction during the Neoproterozoic – early Palaeozoic evolution of the SW Gondwana margin

et al. 2021

View full text Add to dashboard Cite

show abstract

“…21). These ages, not measured in the present study, could correspond to far-field tectonic activity associated with the Grenville orogeny (Gordon and Hempton 1986) and the initial rifting event of Rodinia, for example (Badger et al 2010;McClellan and Gazel 2014). It is to date unknown whether these two events have led to the formation of new mineralization or simply caused alteration and reset of existing mineralization.…”

Section: Post Mackenzie Dikes Minor Fracturing Events and U Mineralizmentioning

confidence: 70%

Structural controls and metallogenic model of polyphase uranium mineralization in the Kiggavik area (Nunavut, Canada)

et al. 2020

View full text Add to dashboard Cite

The Kiggavik area is located on the eastern border of the Paleo-to Mesoproterozoic Thelon Basin (Nunavut, Canada) and hosts major uranium mineralization in Archean basement rocks. These mineralizations display a strong structural control and share many similarities with the world-class unconformity-related U deposits of the coeval Athabasca Basin (Saskatchewan, Canada). An innovative cross-disciplinary study combining macro-to micro-scale characterization was applied to define the uranium mineral system in the Kiggavik area: observation, characterization and measurement of fractures in the field and from drillcores, petrographic and cathodoluminescence identification of fracture cements, analysis of fluid inclusions, and analysis of uranium oxides and related mineral phases through SEM, LA ICP-MS and SIMS. The analysis of fluid inclusions coupled with oriented measurements of fluid inclusions planes they constitute allow allows to link fluid circulation to a tectonic stress and therefore to bridge the gap between the micro and the macro-scales. Our results show that the first order fault/fracture network in the Kiggavik area is mainly oriented ENE-WSW and NE-SW and consists of polyphased fault zones initiated during the Thelon and Trans-Hudsonian orogenies (ca. 1900-1800 Ma). These faults were subsequently U mineralized in four stages referred to as U0, U1, U2 and U3. These different U stages,

show abstract

Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin

Martina

Astini

Pimentel

2014

Journal of South American Earth Sciences

View full text Add to dashboard Cite

Stratigraphy and geochemistry of the Catoctin volcanics: Implications for mantle evolution during the breakup of Rodinia

Cited by 5 publications

References 0 publications

The Cuyano proto-ocean between the Chilenia and Cuyania terranes: rifting and plume interaction during the Neoproterozoic – early Palaeozoic evolution of the SW Gondwana margin

The Cuyano proto-ocean between the Chilenia and Cuyania terranes: rifting and plume interaction during the Neoproterozoic – early Palaeozoic evolution of the SW Gondwana margin

Structural controls and metallogenic model of polyphase uranium mineralization in the Kiggavik area (Nunavut, Canada)

Sr–Nd isotope data of basement rocks from the northernmost argentine Precordillera and its implications for the early Paleozoic evolution of SW Gondwana margin

Contact Info

Product

Resources

About