Petrogenesis of metaluminous A-type rhyolites from the St Francois Mountains, Missouri and the Mesoproterozoic evolution of the southern Laurentian margin

Menuge, Julian F.; Brewer, T. S.; Seeger, Cheryl M.

doi:10.1016/s0301-9268(01)00211-x

Cited by 77 publications

(39 citation statements)

References 54 publications

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“…1.55 Ga Laurentian margin and another accreted arc to the southeast. T DM values for the St. Francois Mountain granite plutons are close to their crystallization ages providing a strong argument for derivation via melting of juvenile, calcalkaline crust shortly after its accretion (Van Schmus et al 1993a, b;Menuge et al 2002;Rohs and Van Schmus 2007;Slagstad et al 2009 the St. Francois Mountains indicating that the two regions are underlain by crust of the same age. Although crystallization ages for samples from the Arbuckle Mountains are ca.…”

Section: Mazatzal Provincementioning

confidence: 73%

“…One of the most impressive associations extends the length of the Grenville Province from Labrador to the Adirondacks, the southeastern Granite-Rhyolite provinces, and the Grenvillian rocks of Texas. Along thẽ 5000 km length of this belt, the oldest granitoid plutons have zircon crystallization ages of ~1.45-1.35 Ga and T DM~1 .55-1.4 Ga McLelland et al 1996;Menuge et al 2002;Roller 2004;Dickin and McNutt 2007;Slagstad et al 2009;Dickin et al 2010;Fisher et al 2010). Because the crystallization ages of the granitic plutons are within ~100 m.y.…”

Section: Age Of Source Rocks For Adirondack-appalachian Mesoproterozomentioning

confidence: 98%

“…It has been argued that the Granite-Rhyolite subprovinces are the result of the development of a continental margin arc with northwest polarity and with suturing along the T DM 1.55 Ga line (Van Schmus et al 1993a, b;Rivers and Corrigan 2000;Menuge et al 2002;Rohs and Van Schmus 2007;Slagstad et al 2009). The arc is well exposed in the Grenville Province where evidence for ca.…”

Section: Mazatzal Provincementioning

confidence: 99%

“…Bowring et al 1991). Accordingly, a southeast-facing continental margin arc setting has been proposed for the eastern margin of Laurentia from 1.48-1.35 Ga (Rivers and Corrigan 2000;Menuge et al 2002). High-grade remnants of the actual arc are well exposed (Slagstad et al 2009) in the Muskoka Domain (Fig.…”

Section: Age Of Source Rocks For Adirondack-appalachian Mesoproterozomentioning

confidence: 99%

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Tectonic Evolution of the Adirondack Mountains and Grenville Orogen Inliers within the USA

McLelland

Selleck

Bickford³

2013

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Recent investigations in geochronology and tectonics provide important new insights into the evolution of the Grenville Orogen in North America. Here, we summarize results of this research in the USA and focus upon ca. 1.4–0.98 Ga occurrences extending from the Adirondack Mountains to the southern Appalachians and Texas. Recent geochronology (mainly by U/Pb SHRIMP) establishes that these widely separated regions experienced similar tectonomagmatic events, i.e., the Elzevirian (ca. 1.25–1.22 Ga), Shawinigan (ca. 1.2–1.14 Ga), and Grenvillian (ca. 1.09–0.98 Ga) orogenies and associated plate interactions. Notwithstanding these commonalities, Nd model ages and Pb isotopic mapping has revealed important differences that are best explained by the existence of contrasting compositions of deep crustal reservoirs beneath the Adirondacks and the southern Appalachians. The isotopic compositions for the Adirondacks lie on the same Pb–Pb array as those for the Grenville Province, the Granite-Rhyolite Province and the Grenvillian inliers of Texas suggesting that they all developed on Laurentian crust. On the other hand, data from the southern Appalachians are similar to those of the Sunsas Terrane in Brazil and suggest that Amazonian crust with these Pb–Pb characteristics was thrust onto eastern Laurentia during its Grenvillian collision with Amazonia and subsequently transferred to the latter during the late Neoproterozoic breakup of the supercontinent, Rodinia, and the formation of the Iapetus Ocean. The ca. 1.3–1.0 Ga Grenville Orogen is also exposed in the Llano Uplift of Texas and in small inliers in west Texas and northeast Mexico. The Llano Uplift contains evidence for a major collision with a southern continent at ca. 1.15–1.12 Ga (Kalahari Craton?), magmatic arcs, and back-arc and foreland basins, all of which are reviewed. The Grenvillian Orogeny is considered to be the culminating tectonic event that terminated approximately 500 m.y. of continental margin growth along southeastern Laurentia by accretion, continental margin arc magmatism, and metamorphism. Accordingly, we briefly review the tectonic and magmatic histories of these Paleoproterozoic and Mesoproterozoic pre-Grenvillian orogens, i.e., Penokean, Yavapai, and Mazatzal as well as the Granite-Rhyolite Province and discuss their ~5000 km transcontinental span.SOMMAIREDes recherches récentes en géochronologie et en tectonique révèlent d’importants faits nouveaux sur l’évolution de l’orogénie de Grenville en Amérique du Nord. Nous présentons ici un sommaire des résultats de cet effort de recherche aux USA en mettant l’accent sur les indices datés entre env. 1,4 et 0,98 Ga, à partir des monts Adirondack jusqu’au sud des Appalaches et au Texas. Des données géochronologiques récentes (par microsonde SHRIMP principalement) indiquent que les roches de ces régions très éloignées les unes des autres ont subies l’effet d’épisodes tectonomagmatiques similaires, par exemple, aux orogenèses de l’Elzévirien (env. 1.25–1.22 Ga), de Shawinigan (env. 1.2–1.14 Ga), et du Grenvillien (env. 1.09–0.98 Ga), ainsi que des interactions des plaques associées. Malgré ces points communs, la chronologie Nd et la cartographie isotopique Pb a révélé des différences importantes qui s’expliquent plus aisément par des compositions contrastées des réservoirs profonds de croûte sous les Adirondacks et le sud des Appalaches. Les compositions isotopiques des Adirondacks sont de la même gamme Pb-Pb que ceux de la Province de Grenville, de la Province Granite-rhyolite et des boutonnières grenvilliennes du Texas, suggérant qu'ils se sont tous développées sur la croûte des Laurentides. Par ailleurs, les données des Appalaches du sud sont semblables à celles du terrane de Sunsas au Brésil, ce qui incite à penser que la croûte amazonienne, avec de telles caractéristiques Pb-Pb, a été poussée sur la portion est de Laurentia lors de sa collision grenvillienne avec l’Amazonie puis laissée à cette dernière au cours de la rupture du supercontinent Rodinia vers la fin du Néoprotérozoïque, avec la formation de l'océan Iapetus. L’orogène de Grenville (1,3 à 1,0 Ga env.) est également exposé dans le soulèvement de Llano au Texas et dans de petites boutonnières dans l'ouest du Texas et le nord du Mexique. Le soulèvement de Llano montre des indices d'une collision majeure avec un continent au sud, entre env. 1,15 et 1,12 Ga (craton de Kalahari?), des zones d’arcs magmatiques, d'arrière-arc et de bassin d'avant-pays, chacun étant présenté ci-dessous. L'orogenèse de Grenville est considéré comme l'événement tectonique culminant qui marqué la fin d’une période d’environ 500 ma d’accroissement de la marge continentale le long de la bordure sud-est de la Laurentie, par accrétion, magmatisme d’arc de marge continentale, et métamorphisme. C’est pourquoi, nous passons brièvement en revue l'histoire tectonique et magmatique de ces orogènes pré-grenvilliennes paléoprotérozoïques et mésoprotérozoïques, pénokéenne, de Yavapai, et de Mazatzal ainsi que la Province de Granite-rhyolite, et discutons de son étendue sur env. 5 000 km.

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Section: Mazatzal Provincementioning

confidence: 73%

Section: Age Of Source Rocks For Adirondack-appalachian Mesoproterozomentioning

confidence: 98%

Section: Mazatzal Provincementioning

confidence: 99%

Section: Age Of Source Rocks For Adirondack-appalachian Mesoproterozomentioning

confidence: 99%

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Tectonic Evolution of the Adirondack Mountains and Grenville Orogen Inliers within the USA

McLelland

Selleck

Bickford³

2013

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“…Partial melting and fractional crystallization of crustal rocks accompanied by assimilation of the upper crust have been proposed for the rhyolites of Patagonia (Pankhurst and Rapela, 1995;Riley et al, 2001), Mesa central, Mexico (Orozco-Esquivel et al, 2002), St Francois mountains, Missouri (Menuge et al, 2002), felsic volcanics of the Cretaceous paresis ring complex, Namibia (Mingram et al, 2000), and the Malani Igneous Suite, northwestern India (Eby and Kochhar, 1990;Singh et al, 2006). This process is considered appropriate for such large-volume felsic magmatism, whereas it is unlikely for small-volume silicic magma-bodies which were generated from fractional crystallization of mantle derived basaltic magmas or partial melting of basaltic material.…”

Section: Introductionmentioning

confidence: 99%

Petrogenetic evolution of the felsic and mafic volcanic suite in the Siang window of Eastern Himalaya, Northeast India

Singh

2012

Geoscience Frontiers

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The Abor volcanics outcroping in the core of the Siang window in the Eastern Himalaya comprise voluminous mafic volcanics (47%e56% w(SiO 2 )), with subordinate felsic volcanics (67%e75% w(SiO 2 )). The felsic volcanics are dacitic to rhyolitic in composition and are typically enriched in LREE (La/Sm N Z 3.09e3.90) with high REE contents (256e588 ppm), moderately fractionated REE patterns (Ce N /Yb N Z 6.54e9.52) and pronounced negative Eu anomalies (Eu/Eu* Z 0.55e 0.72). Wide variations in Rb/Zr, K/Rb and La/Sm ratios suggest that they were derived from magmas which were randomly contaminated with crustal material. Chemical characteristics and petrogenetic modelling indicate that the dacites were generated by w15% partial melting of a mafic source leaving a residue with 55% plagioclase, 14% orthoclase, 18% clinopyroxene, 5% orthopyroxene, 8% hornblende. The silica-rich rhyodacites and rhyolites were derived from a dacite magma source by a higher degree (>45%) fractional crystallization of an assemblage consisting of 70% plagioclase, 12% clinopyroxene, 7% amphibole and 11% magnetite. The associated LREE-LILE enrichment and pronounced negative GEOSCIENCE FRONTIERS journal homepage: www.elsevier.com/locate/gsf GEOSCIENCE FRONTIERS 3(5) (2012) 613e634 anomalies for HFSE (Nb, P, and Ti) exhibited by these felsic volcanics are characteristic of continental rift volcanism, implying that they were emplaced during lithospheric extension. ª 2012, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V. All rights reserved.

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Tracking the transition from subduction‐related to post‐collisional magmatism in the north Arabian–Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt

et al. 2019

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Field and geochemical observations of the granitoids of the Homrit Waggat area in the central Eastern Desert of Egypt reveal two magmatic phases. The early phase of weakly deformed subduction-related calc-alkaline rocks includes tonalite and granodiorite. We name the later phase the Homrit Waggat Pluton (HWP); it includes undeformed syenogranite, alkali feldspar granite, and minor albitized granite. The tonalite and granodiorite have distinct negative Nb-Ta anomalies and lower alkalis, REE, Nb, Zr, and Hf than the HWP. The early magmatic pulse is a subduction-related suite, likely generated by underplating of mantle-derived magmas that triggered partial melting of mafic lower crust; mixing of these melts led to intermediate magma that further fractionated to tonalite and granodiorite. The HWP granites of the late magmatic pulse are transitional from a subduction-related to an anorogenic within-plate environment, plausibly generated by post-collisional lithosphere delamination. Although the parent magma of the HWP was I-type, extensive fractional crystallization produced residual liquids with A 2 -type character. Albitized granites are found only along the outer margin of the HWP, and contacts with the alkali feldspar granite are gradational, suggesting fluid interactions at a late stage of crystallization. The original textures of the albitized granites are preserved, but their bulk composition was modified by the production of Narich minerals and the removal of K, REE, and some trace elements by fluids.

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Petrogenesis of metaluminous A-type rhyolites from the St Francois Mountains, Missouri and the Mesoproterozoic evolution of the southern Laurentian margin

Cited by 77 publications

References 54 publications

Tectonic Evolution of the Adirondack Mountains and Grenville Orogen Inliers within the USA

Tectonic Evolution of the Adirondack Mountains and Grenville Orogen Inliers within the USA

Petrogenetic evolution of the felsic and mafic volcanic suite in the Siang window of Eastern Himalaya, Northeast India

Tracking the transition from subduction‐related to post‐collisional magmatism in the north Arabian–Nubian Shield: A case study from the Homrit Waggat area of the Eastern Desert of Egypt

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