Analyses and description of a concentrate of stillwellite from Mineville, Essex County, New York

Mei, Leung; Larson, Ruth; Loferski, P.J.; Klemic, Harry

doi:10.3133/ofr79847

Cited by 3 publications

(3 citation statements)

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“…Harkerite occurs at Cascade Slide (Grew et al 1999). Stillwellite-(Ce) occurs at Mineville (Mei et al 1979;Lupulescu 2008;Lupulescu et al 2013). Taken together these high-grade metamorphic boron-bearing mineral assemblages form a geographical array that makes sense given the pattern of high-grade metamorphism in the Adirondack Highlands and the availability of boron from the preexisting sedi- mentary rocks.…”

Section: Geologymentioning

confidence: 96%

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

2015

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Section: Geologymentioning

confidence: 96%

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

2015

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“…In New York State, the only known occurrence of stillwellite-(Ce) is in the iron ore deposits of Mineville in the eastern Adirondack Highlands (Figure 1). It was first identified in 1979 in a sample collected from the "Old Bed" orebody in the Adirondack Mine of the Republic Steel Company; the sample was collected near a fault at the minus 2100-feet level in the mine [83]. The presence of stillwellite-(Ce) was confirmed on the basis of both X-ray diffraction and semi-quantitative spectrographic chemical analysis [83].…”

Section: Stillwellite-(ce) Cebsiomentioning

confidence: 99%

“…It was first identified in 1979 in a sample collected from the "Old Bed" orebody in the Adirondack Mine of the Republic Steel Company; the sample was collected near a fault at the minus 2100-feet level in the mine [83]. The presence of stillwellite-(Ce) was confirmed on the basis of both X-ray diffraction and semi-quantitative spectrographic chemical analysis [83]. More recent chemical analyses have confirmed the presence of stillwellite-(Ce) at Mineville [84], but because of the lack of available in-situ samples with carefully documented textural and mineralogical associations, the conditions under which these grains formed is unclear.…”

Section: Stillwellite-(ce) Cebsiomentioning

confidence: 99%

A Review of Boron-Bearing Minerals (Excluding Tourmaline) in the Adirondack Region of New York State

et al. 2019

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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.

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