%0 Journal Article %J Rocks & Minerals %D 2019 %T Rose Road Localities: Town of Pitcairn, St. Lawrence County, New York Part 2—Geology %A J. R. Chiarenzelli %A M. V. Lupulescu %A Robinson, G. W. %A Bailey, D. G. %A Walter, M. R. %A S. C. Chamberlain %X

IN PART I OF THIS SERIES we gave a brief introduction to the two localities at Rose Road in the Town of Pitcairn, St. Lawrence County, New York (fig. 2), and presented their detailed history (Chamberlain et al. 2018 Chamberlain, S. C., G. W. Robinson, S. Robinson, M. R. Walter, D. G. Bailey, J. R. Chiarenzelli, and M. Lupulescu. 2018. The Rose Road localities, Town of Pitcairn, St. Lawrence County, New York: Part 1–History. Rocks & Minerals 93: 44230.[Taylor & Francis Online] [Google Scholar]). In Part 2 we provide information about the geology and probable geological origin of both the Wollastonite Skarn and the Purple Diopside Mound

%B Rocks & Minerals %V 94 %P 540-552 %8 10/2019 %G eng %U https://www.tandfonline.com/doi/full/10.1080/00357529.2019.1641024 %N 6 %R 10.1080/00357529.2019.1641024 %0 Journal Article %J Geological Society of America Bulletin %D 2017 %T Lyon Mountain ferroan leucogranite suite: Magmatic response to extensional thinning of overthickened crust in the core of the Grenville orogen %A J. R. Chiarenzelli %A Selleck, B. %A M. V. Lupulescu %A Bickford, M. E. %A Valley, P. %A McLelland, L. %X

Evidence is presented for the crystallization age (ca. 1066−1033 Ma) and origin of the Lyon Mountain Granite (formerly Lyon Mountain Gneiss), a widespread magnetite-bearing leucogranitic igneous suite in the Adirondack Highlands. Recent reinterpretations of U-Pb zircon results have led some to propose that the Lyon Mountain Granite was intruded synchronously with the Shawinigan anorthosite-mangerite-charnockite-granite (AMCG) suite at ca. 1165−1145 Ma. However, this interpretation conflicts with the recognized chronology of the region based on field and analytical studies, which have established a late to postkinematic Ottawan crystallization age (ca. 1050 Ma). Herein, we show that the older ages reported are a consequence of zircon inheritance; we summarize existing and provide new U-Pb zircon data expanding the recognized extent of the Lyon Mountain Granite; and we review long-recognized field relationships and temporal associations among structures within the region and southern Grenville Province. Field relations include a spatial, and likely temporal, link with iron oxide−apatite deposits, gabbroic and amphibolite bodies, and association with late extensional faults and hydrothermal alteration. The variable fabric of the Lyon Mountain Granite is a consequence of magmatic/intrusive processes, proximity to synintrusive structures, and timing of intrusion relative to deformation during an ∼30 m.y. period. The Lyon Mountain Granite formed during late Ottawan anatexis related to gravitational collapse of overthickened crust. Its anhydrous ferroan nature, zircon xenocryst population, and association with magnetite-apatite deposits can be explained by partial melting of Shawinigan-aged, AMCG-dominated lower crust.

%B Geological Society of America Bulletin %V 129 %P 1472-1488 %G eng %U https://pubs.geoscienceworld.org/gsabulletin/article/doi/10.1130/B31697.1/208117/lyon-mountain-ferroan-leucogranite-suite-magmatic %N 11-12 %R 10.1130/B31697.1 %0 Book Section %B Sediment Provenance Influences on Compositional Change from Source to Sink %D 2017 %T Sediment Provenance Utility of Detrital Zircon Grains From Upper Amphibolite Facies Rocks of the Grenville Supergroup, Adirondack Lowlands, Northeastern United States %A J. R. Chiarenzelli %A Kratzmann, D. %A Selleck, B. %A DeLorraine, W. %A M. V. Lupulescu %E Mazumder, Rajat %K Adirondack Lowlands %K Basin evolution %K Detrital zircons %K Grenville Province %K Grenville Supergroup %K Provenance %K Upper amphibolite facies %X

Detrital zircons in quartz-rich lithologies from the deformed and metamorphosed Mesoproterozoic Adirondack Lowlands in northern New York, part of the Grenville Province, have been used to document sediment provenance and basin evolution, and provide initial temporal constraints on sedimentation. Despite the effects of Shawinigan (c. 1200–1150 Ma) and Elzevirian (c. 1240–1225 Ma) orogenesis, zircon grains recovered from quartz-rich lithologies from the Grenville Supergroup largely retain detrital morphology and isotopic systematics, while displaying minimal metamorphic effects. The ages obtained constrain deposition of the entire sequence between c. 1276 and 1255 Ma. Changes in provenance track the evolution of the basin from the initial rift-drift phase, foredeep development, and transition to final basin fill and response to initial pre-Elzevirian compression. The relative lack of zircons derived from the Superior Province and predominance of those from south-central Laurentia during deposition of the sequences indicates the influence of an intervening oceanic basin to the north.

%B Sediment Provenance Influences on Compositional Change from Source to Sink %I Elsevier %C Amsterdam, Netherlands %P 371 - 401 %@ 9780128033869 %G eng %U http://linkinghub.elsevier.com/retrieve/pii/B9780128033869000149 %& 14 %R 10.1016/B978-0-12-803386-9.00014-9 %0 Map %D 2016 %T Bedrock Geology of the Witherbee Quadrangle, Essex County, New York %A J. R. Chiarenzelli %A M. V. Lupulescu %A Grohn, L. %A de Santana do Nascimento %A Walton, M. %B Map and Chart Series 93 %I New York State Museum %C Albany, New York %8 2016 %G eng %U http://www.nysm.nysed.gov/file/2875/ %0 Book Section %B Geology of the Northwestern Adirondacks and St. Lawrence River Valley %D 2014 %T Ultramafic/Mafic Rocks of the Pyrites Complex %A J. R. Chiarenzelli %A M. V. Lupulescu %A Bailey, D. %E J. R. Chiarenzelli %E Valentino, D. %K geology %B Geology of the Northwestern Adirondacks and St. Lawrence River Valley %S Annual Meeting Field Trip Guide %I New York State Geological Association %P 133-161 %G eng %0 Journal Article %J Geosphere %D 2011 %T Differentiating Shawinigan and Ottawan Orogenesis in the Central Adirondacks %A J. R. Chiarenzelli %A Valentino, D. %A M. V. Lupulescu %A Thern, J. %A Johnston , S. %K geology %B Geosphere %V 7 %P 2-22 %G eng %U http://dx.doi.org/10.1130/GES00583.1 %0 Journal Article %J Geosphere %D 2011 %T Tectonic Implications of the Discovery of a Shawinigan Ophiolite (Pyrites Complex) in the Adirondack Lowlands %A J. R. Chiarenzelli %A M. V. Lupulescu %A Thern, E. %A Cousens, B. %K geology %B Geosphere %V 7 %P 333-356 %G eng %U http://dx.doi.org/10.1130/GES00608.1 %R 10.1130/GES00608.1 %0 Journal Article %J Geology %D 2010 %T Enriched Grenvillian Lithospheric Mantle as a Consequence of Long-lived Subduction Beneath Laurentia %A J. R. Chiarenzelli %A M. V. Lupulescu %A Cousens, B. %A Thern, E. %A Coffin, L. %A Regan, S. %K Adirondack Lowlands %K Geochemistry %K geochronology %K lithospheric mantle %X

Geochemical and Nd isotopic data from mafic and newly discovered ultramafic rocks in the Adirondack Lowlands suggest widespread enrichment of the lithospheric mantle under the Grenville Province. Incompatible element abundances and previously published Hf TDM (zircon) (depleted mantle model age) and Nd TDM ages from rocks of the anorthosite-mangerite-charnockite-granite suite in the Adirondack Highlands document similar enrichment in the lower crust and its strong influence on subsequent magmatic events throughout the Ontario-Quebec-Adirondack segment of the Grenville Province. Likely the consequence of long-lived (ca. 1.4–1.2 Ga) northwest-directed subduction along the southeast edge of Laurentia (previously proposed Andean margin), this enrichment is similar to that associated with the vast (>240,000 km2) ultrapotassic province of the western Churchill Province. Enrichment of the lithospheric mantle beneath orogenic belts is a predictable and important differentiation process that has operated on Earth for at least the past 3 b.y.

%B Geology %V 38 %P 151-154 %G eng %U http://geology.gsapubs.org/content/38/2/151.abstract %R 10.1130/G30342.1