 | | Journal (article/letter/editorial) | | GRAND, ISLE: L Jirrwowwux/ lot* llMt UK* U'A VERMONT Mineral Locality Index VANDALL T. K I N G P.O....Massachusetts 01776 MASSACHUSETTS Figure J. Vermont political divisions map; adapted from U.S. Geological...of New Hampshire and Vermont (1972). 324 ROCKS & MINERALS he state of Vermont is relatively small,...quar ry in the world is in Rochester (Windsor Co.), Vermont. Min eral products mined "as is" for their...maintained. (The disuse of cobblestone roads prevents Vermont from being a giant mining state today, but in the |  | | Journal (article/letter/editorial) | | Through the ’Scope SEARCHING VERMONT for MICROMINERALS MARCELLE H. WEBER 1172 West Lake Avenue Guilford...last place one would look for microminerals is Vermont. One of the state’s collectors of such material...about Chester and Eden Mills (Lowell) and that’s it, but it isn’t.’’ Nor should that be all. Vermont is...photographing, and to Johannes “Hans” Swarts, Vermont micromineral collector, who met one of the authors...In the past, a pamphlet could be secured at the Vermont welcome centers listing minerals and where they |  | | Journal (article/letter/editorial) | | isotope systematics of garnets from the Gassetts Schist, Vermont (see section 3 and Vance and Holland 1993)...D. VANCE 3. PROGRADE PROCESSES IN THE GASSETTS SCHIST, VERMONT The diffusion rates of Sm and Nd, and...Holland 1993). The following discussion of the Gassetts Schist will therefore rely equally on high-quality...good illustration of this link. The Gassetts Schist, Vermont, USA contains large garnets which preserve...(Christensen et al. 1989; Vance and Holland 1993). The Gassetts Schist occurs within a Precambrian rift sequence |  | | Journal (article/letter/editorial) | | petrological study of a single garnet from the Gassetts Schist, Vermont Derek Vance and Tim Holland Department...in the Acadian metamorphic terrain of eastern Vermont have been analysed for major elements and segregated...metapelite from the Gassetts Schist which crops out on the west side of the Chester Dome, SE Vermont (Fig. 1),...lodged in the Harker Collection, Cambridge. The Chester Dome (and the smaller Athens Dome to the south)...sequence by Stanley and Ratcliffe (1985). The Gassetts Schist has been assigned to the Cavendish formation |  | | Journal (article/letter/editorial) | | concentrations in metamorphic garnet from southeastern Vermont, USA EDWARDD. YOUNG and DOUGLASRUMBLEIII Geophysical...Institution of Washington, Washington, DC 200 1%1305, USA (Received April 24, 1992; accepted in revisedform...and quartz from a sample of the Gassetts schist, southeastern Vermont, USA. Garnet and quartz 6180v.sMow...Proterozoic-Early Cambrian pelitic schist from southeastern Vermont. The sample examined is representative of a class...‘8O/‘6O values for marbles from southern Maine, USA, are consistent with both extensive fluid-rock interaction |  | | Journal (article/letter/editorial) | | Mineral Reactions in a Calc-Mica Schist from Gassetts, Vermont, U.S.A. Alan Bruce Thompson Department of...study of an interbedded calc-mica schist from Gassetts, Vermont reveals the complexities of Fe-Mg crystalline...interbedded carbonate-pelite sequence near Gassetts, Vermont was made in an attempt to elucidate some of...near the Williams River about 3 km north of Gassetts on Vermont Route 103. The calc-mica schist is adjacent...Tyson Formation, mantling the western part of the Chester gneiss dome (see Doll et al., 1961; Sheppard and |  | | Journal (article/letter/editorial) | | metamorphism of pelitic rocks from Townshend Dam, VT, USA. This modeling builds on a published companion study...well-studied pelitic schists of Townshend Dam, VT, USA. Geological setting The spillway at Townshend Dam...later arched over the Athens dome (part of the Chester–Willoughby arch) during Devonian Acadian deformation... 1 a Simplified geologic map of southeastern Vermont. Star denotes sample location at Townshend Dam...Pressure–temperature conditions vary across southeastern Vermont, as the area is structurally complex. Estimated |  | | Journal (article/letter/editorial) | | this study: the northern Appalachians (Vermont, Maine, New York, USA); North American Cordillera (North Cascades...Cascades Range, Washington; Snake Range, Nevada, USA); western Rocky Mountains (British Columbia, Canada);...University of Minnesota, Minneapolis, MN 55455, USA e-mail: dwhitney@umn.edu are characterized by high-angle...confined to a garnet-bearing schist from SE Vermont, USA. 123 Contrib Mineral Petrol (2010) 160:591–607...Dutchess County, NY (Gt zone) Core: alm61sps25prp3grs11 Rim: alm77sps10prp6grs8 Dutchess County, NY (St |  | | Journal (article/letter/editorial) | | Institute Troy, NY 12180, USA 2 Department of Geology Amherst College Amherst, MA 01002, USA Abstract. A quantitative...communication) for the equilibria staurolite + quartz = almandine + A12SiOs-[-HzO and chloritoid + AI2SiO5 = staurolite...Andalusite Pyrophyllite Muscovite K-feldspar Pyrope Almandine Spessartine Phlogopite Annite Mn-biotite Mg-staurolite...determination resulted in a stability field for almandine garnet that was restricted to unreasonably high...The reactions chloritoid + annite + quartz = almandine + muscovite + H20 and chlorite + muscovite = chloritoid |  | | Journal (article/letter/editorial) | | and State University, Blacksburg, VA 24061-0420, USA ABSTRACT The two major Early to Middle Palaeozoic...Planetary Sciences, M.I.T., Cambridge, MA 02139, USA. 415 416 T . R. A R M S T R O N G , R. J . T R...State, western Connecticut, Massachusetts and Vermont. As suggested by Stanley & Ratcliffe (1985), this...noted in the text: (1) Dutchess County, New York State; (2) Westchester County, New York State; (3) Waterbury...Nashoba Block and Avalonia; (6) Gassetts Schist locality and Chester Dome, Vermont; (7) Hatfield pluton and |  | Defnet, Peter A., Wise, Michael A., Harmon, Russell S., Hark, Richard R., Hilferding, Keith (2021) Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications. Minerals, 11 (7) 705 doi:10.3390/min11070705 | Journal (article/letter/editorial) | | 98195, USA; defnep@uw.edu Department of Chemistry, Juniata College, Huntingdon, PA 16652, USA; richard... Smithsonian Institution, Washington, DC 20560, USA; wisem@si.edu Department of Marine, Earth and Atmospheric...North Carolina State University, Raleigh, NC 27695, USA Institute for the Preservation of Cultural Heritage...Heritage, Yale University, West Haven, CT 06516, USA Correspondence: rsharmon@ncsu.edu; Tel.: +1-919-588-0613...garnet are of six isostructural end-member types–almandine [Fe3 Al2 Si3 O12 ], pyrope [Mg3 Al2 Si3 O12 ] |  | | Journal (article/letter/editorial) | | Williams College, Williamstown, Massachusetts 01267, USA Abstract. During prograde metamorphism garnet and...in a chlorite-chloritoid schist from Jamaica, Vermont. These rocks also provide an excellent opportunity...east of the Green Mountain massif in southern Vermont (Rosenfeld 1968; Thompson and Norton 1968; Naylor...Formation near the Athens dome in southeastern Vermont, 6 km east of the Jamaica area. He suggested that...from Cambrian and Ordovician mafic schists in Vermont and also proposed that they were metamorphosed |  | Millonig, Leo J., Albert, Richard, Gerdes, Axel, Avigad, Dov, Dietsch, Craig (2020) Exploring laser ablation U–Pb dating of regional metamorphic garnet – The Straits Schist, Connecticut, USA. Earth and Planetary Science Letters, 552. 116589pp. doi:10.1016/j.epsl.2020.116589 | Journal (article/letter/editorial) | | metamorphic garnet – The Straits Schist, Connecticut, USA Leo J. Millonig a,b,∗ , Richard Albert a,b , Axel...Cincinnati, P.O. Box 0013, Cincinnati, OH 45221-0013, USA b a r t i c l e i n f o Article history: Received...xenotime from The Straits Schist, western Connecticut, USA, to constrain the timing of garnet growth within...xenotime from The Straits Schist, western Connecticut, USA to evaluate if geologically meaningful ages can be...work represents the first application to typical almandine-pyrope garnet (U <0.1 μg/g; this study) in regional |  | | Journal (article/letter/editorial) | | Springer-Verlag 1982 Ca Distribution Between Almandine-Rich Garnet and Plagioclase in Pelitic and Psammitic...albitic composition and the garnet (a Ca-rich almandine) shows Ca/ C a + M g + F e ratios of about 0.35-0...comparison with other well known metamorphic sequence (Vermont, New Zealand and Dalradian). It is concluded that...has been paid to the Ca distribution between almandine-rich garnet and plagioclase. Only recently, other...suggested an explanation of calcium zoning in almandine-rich garnet with a model based on plagioclase-garnet |  | | Journal (article/letter/editorial) | | Williamstown Mass. Danby, Vermont 9 981 9.975 "Ben Slide" near Herrick Mt , Ira, Vermont Paragonite,A 9 623...7 Lincoln Mtn., Vermont 9.959 9 632 0.327+ almandine- almandine 3 almandine 3 biotite(?) 3...3 almandine 3 004 chloritoidchloriteilmenitequartz 8 9 Mt. Ashley,Mt Washington, Mass. 9.957...chloriteqtattz 9 623 0 327 - 006 chlorite- almandine chloritoidplagioclasealmandinemagnetitequa\tz...0 . 3 1 6+ . 0 0 2 Plymouth, Vermont Ludlow, Vermont Stratton,Vermont Mt. Plantain, Mt. Washington, |  | | Journal (article/letter/editorial) | | reaction histories of the host rock in the Gassetts schists of Vermont, U.S.A. Itaya and Banno (1980) used the... 9-01, 10-01 and 11-05. Mn: spessartine, Fe: almandine, Mg: pyrope. of the other sets. Thus, the compositions...chlorite, qz: quartz, spe: spessartine, aim: almandine, pyr: pyrope, w: water. 58 TABLE 2 Phase compositions...Mn-chlorite Fe-chlorite Mg-chlorite Quartz Spessartine Almandine Pyrope MngAl6SisO20(OH)x6 Fe 9Al e Si s O20 (OH)16...different m e t a m o r p h i c terrains Appalachian, Vermont, U.S.A. Sanbagawa, Japan Unazuki, Japa~ Gt-Ch |  | | Journal (article/letter/editorial) | | reversal, which is most pronounced with respect to almandine and grossular components, is present in the outer...University of North Carolina, Chapel Hill, NC 27599-3315, USA. amphibolite facies pelitic schist near the staurolite-in...in the garnet. All garnet from this outcrop is almandine-rich [Xa,m = 0.690.76 (rim); 0.64-0.69 (core);...garnet cores, almandine >> grossular > spessartine > pyrope; in outer cores, almandine >> pyrope > grossular...at rims, almandine >> pyrope > grossular > spessartine. From core to outer core, almandine and pyrope |  | | Journal (article/letter/editorial) | | zoned (Fig. 8) and the greatest deviations from almandine-pyrope solid solutions are observed in garnet-gradesamples...679 TERRANE SPESSARTINE STAUROLITE ZONE /O4c ALMANDINE GROSSULAR KY A N I T E Z O N E FML /O9 '7CP435...Passare identical to thosefound at Mt. Grant in Vermont [Albee (1965),and Fig. l7]. Even the incomplete...are very similar to the assemblages the Gassetts Schist, Vermont (Thompson et al., 1977).Fernc-iron phasesdo...the regional metamorphic terranes in northern Vermont (Albee, 1968) and in the Barrovian terrain in Scotland |  | | Journal (article/letter/editorial) | | distribution of its inclusions in the Gassetts schist from Vermont to reveal the paragenetic history of...spessartine contents discontinuously increase, and almandine and pyrope contents discontinuously decrease at...gradually decreases toward the outermost rim; the almandine and spessartine contents show the opposite trends...Figure 2a. Abbreviations for end-members: Alm = almandine; Grs = grossular; Prp = pyrope; Sps = spessartine...Figure 6a. Abbreviations for end-members: Alm = almandine; Grs = grossular; Prp = pyrope; Sps = spessartine |  | | Journal (article/letter/editorial) | | exchange reaction; ~Fe3A12Si30~2+ MnTiO3 =89 almandine pyrospessartine phanite + FeTiO3 ilmenite (l)...minor positive deviations from ideality along the almandine-spessartine join with an interaction of about...mediummetamorphic grade, garnets are essentially almandine-spessartine solid-solutions with pyrope, grossular...mixing of almandine and pyrope as an asymmetric solution with the greatest non-ideality for almandine-rich...high-grade assemblages are generally in excess of 70% almandine plus pyrope components. Fortunately, in most low-grade |  | | Journal (article/letter/editorial) | | spessartine content, (b) modal proportion, (c) almandine content, and (d) grossular content. Note the parallelism...the temperature and pressure dependance of the almandine and grossular isopleths, respectively. (a) The...isopleths marked as alm, gross, and spess for the almandine, grossular and spessartine contents of garnet...The values for spessartine at point 4 and both almandine and spessartine at point 5 are not stable at any... mol% Pyrope-Grossular-Almandine 0.9 0.8 0.7 0.6 Pyrope Grossular Almandine 0.5 0.4 0.3 0.2 0.1 0 |  | | Journal (article/letter/editorial) | | the linear coefficientof thermal expansionof almandine-typegarnet near standardconditions higherthan...and inclusionhavedifferentequations of q11., almandine-quartz(Rosenfeld, lg69, p. state.Regionl will...called..integral null curves"or "isogons")for almandine-quartz was basedon the very scantdata on a's and...generalizationabout the effect of solid solutionon the almandine-quartz isomekes. All garnets were analyzedby electronmicroprobe... ExperimentalResults Resultsfor Pair: Quartz-Almandine-TypeGarnet Figures 2, 3, and 4 show data points |  | | Journal (article/letter/editorial) | | 21218, USA b WiscSIMS, Department of Geoscience, University of Wisconsin, Madison, WI 53706, USA Received...fifteen samples from Barrovian terrains in eastern Vermont, USA, and the Central Swiss Alps. The most common...from a single stratigraphic unit in east-central Vermont (Fig. 1) to evaluate the effects of lithology and...Swiss Alps Gass Gassetts, Vermont, USA Q1d Gile Mountain Fm., east-central Vermont, USA Q1J Gile Mountain...Mountain Fm., east-central Vermont, USA Q2A Gile Mountain Fm., east-central Vermont, USA 3-4F Waits River Fm |  | | Journal (article/letter/editorial) | | used to describe mixing in the system pyrope–almandine– grossular. Following Koziol (1990), only Ca–Mg...variable: NCKFASH system variable: end-members: almandine (alm) a =(1−z)3 alm grossular (gr) a =z3 gr NCKMASH...aideal=(1−x−z)3 py RT ln c =w z(x+z) py,g MgCa almandine (alm) Fe Al Si O 3 2 3 8 aideal=x3 alm RT ln c...(Fe+Mg) end-members: pyrope (py) a =(1−x)3 py almandine (alm) a =x3 alm muscovite (mu) NCKFMASH and NKFMASH...Wood, B. J., 1978. Thermodynamic properties of almandine-grossular garnet solid solutions. Contributions |  | | Journal (article/letter/editorial) | | regional metamorphism in central Massachusetts and Vermont, respectively, based on the relations between chemical...was used throughout. The standards were natural almandine for A1, Si, and Fe, natural pyrope for Mg and...345-356. Crawford, M.L., 1977. Calcium zoning in almandine garnet, Wissahickon Formation, Philadelphia, Pennsylvania...mineral inclusions in garnet from the Gassetts schists, Vermont. Am. J. Sci., 277: 1 1 5 2 1167. Tracy |
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Gassetts, Chester, Windsor County, Vermont, USA