Petrogenesis of prismatine-bearing metapelitic gneisses along the Moose River, west-central Adirondacks, New York

Darling, Robert S.; Florence, Frank P.; Lester, Gregory W.; Whitney, Philip R.

doi:10.1130/0-8137-1197-5.325

Cited by 12 publications

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“…1.09-1.05 Ga. Peak metamorphic mineral assemblages in these rocks record temperatures of 750°-850°C and pressures of 6-9 MPa consistent with mid-crustal granulite-facies conditions (Bohlen et al 1985;Florence et al 1995;Kitchen and Valley 1995;Darling et al 2004;Storm and Spear 2005). There has been less certainty about when these granulite-facies P, T conditions developed in the AHT, but robust evidence has recently been provided by mineral assemblages, coupled with zircon dating, in the famous Gore Mountain garnet mine which exposes the world's largest garnet crystals (average diameter ~18 cm, largest diameter 1 m; McLelland and Selleck 2012).…”

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confidence: 96%

“…High grade Shawinigan metamorphism affected the entire AHT resulting in assemblages above the second sillimanite isograd and caused widespread anatexis in metapelite (Heumann et al 2006;Bickford et al 2008;McLelland et al 2010a). To a large extent, Shawinigan effects in the AHT are overprinted by the intense granulite facies Ottawan Orogeny that produced temperatures of ~750°-850°C and pressures of 6-9 MPa in the AHT (Bohlen et al 1985;Kitchen and Valley 1995;Darling et al 2004;Storm and Spear 2005; among others) and reset titanite ages to ca. 1.03 Ga and hornblende 40 Ar/ 39 Ar ages to ca.…”

Section: Geology Of the Adirondack Mountainsmentioning

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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confidence: 96%

Section: Geology Of the Adirondack Mountainsmentioning

confidence: 99%

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

McLelland

Selleck

Bickford³

2013

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“…Vonsenite occurs in the iron deposit at Jayville (Leonard and Vlisidis 1961). Prismatine occurs at Moose River (Darling et al 2004). Serendibite, sapphirine, and sinhalite occur at several sites near Johnsburg (e.g., the Amstrong farm [Newland 1919;Grew et al 1992;Schaller and Hildebrand 1955]).…”

Section: Geologymentioning

confidence: 98%

The Classic Danburite Occurrence Near Russell, St. Lawrence County, New York

2015

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“…About 14 km to the east of the study area, Darling et al . () determined metamorphic pressure–temperature conditions of 6.6 ± 0.6 kb and 850 ± 20°C for orthopyroxene + garnet assemblages in metapelites. The ~850°C temperatures were later verified by Ti‐in‐quartz geothermometry on the same rocks (Storm & Spear ).…”

Section: Study Area and Host Rocksmentioning

confidence: 99%

Zircon‐bearing, crystallized melt inclusions in peritectic garnet from the western Adirondack Mountains, New York State, USA

Darling

2013

Geofluids

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Crystallized melt inclusions (MI) occur in garnet from metapelitic gneiss extracted from a hydroelectric plant on the Black River at Port Leyden, NY (western Adirondack Highlands). The garnet host grains are small (0.5–1.0 mm), euhedral neoblasts that formed peritectically during biotite melting accompanying the Ottawan phase of the Grenville Orogeny. The crystallized MI are typically 10–25 μm in diameter and occur randomly in garnet. Nearly all of the crystallized MI observed contain a relatively large (3–15 μm), often euhedral, zircon grain surrounded by finer‐grained (some <1 μm) phases with energy dispersive X‐ray spectra consistent with biotite, K‐feldspar, quartz, and albite. The inclusions are similar in size and composition to those described in garnet from other migmatites and are similarly interpreted as crystallized anatectic melt. Low Zr solubility in silicate melt indicates that the large zircon grain in each inclusion must be a trapped solid. It is inferred that micrometer‐scale droplets of anatectic melt chemically adhered to occluded zircon grains in biotite while peritectic garnet grew around them.

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Petrogenesis of prismatine-bearing metapelitic gneisses along the Moose River, west-central Adirondacks, New York

Cited by 12 publications

References 0 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

The Classic Danburite Occurrence Near Russell, St. Lawrence County, New York

Zircon‐bearing, crystallized melt inclusions in peritectic garnet from the western Adirondack Mountains, New York State, USA

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