02535nas a2200361 4500008004100000245010500041210006900146260001200215300000800227490000600235520152900241653002501770653001901795653001401814653001301828653001701841653001801858653002301876653001401899653001601913653001501929653001601944653001401960653002201974653001401996653001502010100001902025700002202044700002002066700001902086700002402105856004402129 2019 eng d00aA Review of Boron-Bearing Minerals (Excluding Tourmaline) in the Adirondack Region of New York State0 aReview of BoronBearing Minerals Excluding Tourmaline in the Adir c10/2019 a6440 v93 a

Boron is a biologically important element, but its distribution in the natural environment and its behavior during many geological processes is not fully understood. In most metamorphic and igneous environments, boron is incorporated into minerals of the tourmaline supergroup. In high-grade metamorphic terranes like that of the Adirondack region of northern New York State, uncommon rock compositions combined with unusual and variable geologic conditions resulted in the formation of many additional boron-bearing minerals. This paper reviews the occurrences and geological settings of twelve relatively uncommon boron-bearing minerals in the southern Grenville Province of upstate New York and provides new chemical and Raman spectral data for seven of these minerals. The boron minerals range from relatively simple metal borates (e.g., vonsenite), to chemically complex borosilicates (e.g., prismatine), to a relatively rare borosilicate-carbonate (e.g., harkerite). Some are of primary igneous origin, while others are formed by a variety of prograde and retrograde metamorphic processes or by metasomatic/hydrothermal processes. Most of the boron minerals are formed within, or adjacent to, metasedimentary lithologies that surround the anorthositic massifs of the central Adirondacks. The metasedimentary rocks are thought to be the source of most of the boron, although additional boron isotope studies are needed to confirm this and to constrain the mechanisms of the formation of these unusual minerals.

10aAdirondack Mountains10aboron minerals10adanburite10adatolite10adumortierite10agrandidierite10aGrenville Province10aharkerite10akornerupine10aprismatine10aserendibite10asinhalite10astillwellite-(Ce)10avonsenite10awarwickite1 aBailey, D., G.1 aLupulescu, M., V.1 aDarling, R., S.1 aSinger, J., W.1 aChamberlain, S., C. uhttps://www.mdpi.com/2075-163X/9/10/64402260nas a2200169 4500008004100000022001400041245012800055210006900183300001200252490000700264520166400271100001901935700002201954700002501976700002602001856006302027 2017 eng d a0008-407700aAge and origin of the Cannon Point syenite, Essex County, New York: southernmost expression of Monteregian Hills magmatism?0 aAge and origin of the Cannon Point syenite Essex County New York a379-3920 v543 a

Two syenite sills intrude the local Paleozoic strata of eastern New York State and are exposed along the western shore of Lake Champlain. The sills are fine-grained, alkali feldspar syenites and quartz syenites, with phenocrysts of sanidine and albite. The two sills are compositionally distinct, with crossing rare earth element profiles and different incompatible element ratios, which eliminates the possibility of a simple petrogenetic relationship. Zircon extracted from the upper sill yields a U–Pb age of 131.1 ± 1.7 Ma, making the sills the youngest known igneous rocks in New York State. This age is similar to that of the earliest intrusions in the Monteregian Hills of Quebec, >100 km to the north. Sr and Nd radiogenic isotope ratios are also similar to those observed in some of the syenitic rocks of the eastern Monteregian Hills. The Cannon Point syenites have compositions typical of A-type, within-plate granitoids. They exhibit unusually high Ta and Nb concentrations, resulting in distinct trace element signatures that are similar to those of the silicic rocks of the Valles Caldera, a large, rift-related magmatic system. We suggest that the Cannon Point syenites were melts derived primarily by anatexis of old, primitive, lower crustal material in response to Mesozoic rifting and to the intrusion of mantle-derived magmas. The sills indicate that the effects of continental rifting were spatially and temporally extensive, resulting in the reactivation of basement faults in the Lake Champlain Valley hundreds of kilometers west of the active rift boundary, and crustal melting >50 Ma after the initiation of rifting.

1 aBailey, D., G.1 aLupulescu, M., V.1 aChiarenzelli, J., R.1 aTraylor, Jonathan, P. uhttp://www.nrcresearchpress.com/doi/10.1139/cjes-2016-014400617nas a2200145 4500008004100000245012700041210006900168260004000237300001200277100001900289700002200308700002500330700001900355856009700374 2017 eng d00aKimberlites in the Cayuga Lake Region of Central New York: The Six Mile Creek, Williams Brook, and Taughannock Creek Dikes0 aKimberlites in the Cayuga Lake Region of Central New York The Si aAlfred, New YorkbAlfred University a159-1891 aBailey, D., G.1 aLupulescu, M., V.1 aChiarenzelli, J., R.1 aMuller, O., H. uhttps://nysm.nysed.gov/staff-publications/kimberlites-cayuga-lake-region-central-new-york-si03894nas a2200205 4500008004100000245011900041210006900160300001200229490001200241520323600253653002403489653001703513653001503530653002303545653001503568653001303583100001903596700002203615856005103637 2015 eng d00aSpatial, Temporal, Mineralogical, and Compositional Variations in Mesozoic Kimberlitic Magmatism in New York State0 aSpatial Temporal Mineralogical and Compositional Variations in M a298-3100 v212-2153 a

Mesozoic kimberlitic magmatism was geographically widespread across central New York State, and nearly 90 distinct intrusions have been discovered since the first “serpentinite body” was described over 175 years ago. Most of the intrusions are narrow (< 30 cm wide), near vertical, north–south oriented dikes, although three larger, irregular diatremes are also known. Previous studies assumed that all of the intrusions were genetically and temporally related, and often examined only a small sub-set of the intrusions. By combining modern samples with historic samples in the collections of the New York State Museum and Hamilton College, we were able to obtain detailed mineralogical and geochemical data on samples from 27 distinct intrusions.

The intrusions can be divided into four distinct groups on the basis of both mineralogy and geochemistry, and previously published radiometric age dates suggest that these four groups may also have distinct emplacement ages. Group A intrusions are exposed on the western margin of Cayuga Lake near Ithaca, and are characterized by olivine and phlogopite macrocrysts in a serpentine and phlogopite-rich matrix. These intrusions are relatively Ti-rich and contain abundant perovskite grains in the groundmass that yielded U–Pb crystallization ages of ~ 146 Ma (Heaman and Kjarsgaard, 2000). Group B intrusions are exposed over a relatively large area surrounding Ithaca, and are characterized by having a diverse macrocryst assemblage that includes pyrope, diopside, and spinel in addition to olivine and phlogopite. These intrusions are the most incompatible and REE enriched, and are chemically similar to the Kirkland Lake kimberlites in eastern Ontario. Intrusion ages for this group cluster between 125 and 110 Ma. Group C intrusions are all found within the city of Syracuse, and are similar to the Group B intrusions in both mineralogy and chemistry. They appear to be somewhat older, with intrusion ages of 135–125 Ma. Finally, Group D intrusions are geographically distant from the other three groups, being exposed in East Canada Creek nearly 100 km east of the Syracuse dikes. They are characterized mineralogically by abundant olivine and sparse, but large, phlogopite macrocrysts, and chemically by having the lowest incompatible element and rare earth element (REE) concentrations, and the highest 87Sr/86Sr ratios. Intrusion ages for these dikes are poorly constrained, but appear to be contemporaneous with, or slightly older than, the ~ 146 Ma Group A intrusions.

All of the kimberlitic intrusions in central New York State have initial Sr and Nd isotope ratios close to bulk earth. This fact, combined with the observed macrocryst assemblages and incompatible trace element ratios, indicates that these magmas were derived primarily from an asthenospheric, garnet lherzolite source. Episodic intrusion of small volume, volatile-rich kimberlitic magmas into the Paleozoic sedimentary platform rocks of central New York appears to have occurred along ancient crustal structures that were reactivated by the far field stresses related to the opening of the North Atlantic Ocean.

10aContinental rifting10aGeochemistry10aKimberlite10aMesozoic magmatism10aMineralogy10aNew York1 aBailey, D., G.1 aLupulescu, M., V. uhttp://dx.doi.org/10.1016/j.lithos.2014.11.02200463nas a2200145 4500008004100000245007900041210006900120300001200189490000700201653001200208100001900220700001600239700001400255856004800269 2009 eng d00aMinerals of the Silurian Lockport Group Central and Western New York State0 aMinerals of the Silurian Lockport Group Central and Western New  a326-3370 v8410ageology1 aBailey, D., G.1 aHawkins, M.1 aHiler, C. uhttp://dx.doi.org/10.3200/RMIN.84.4.326-337