 | | Journal (article/letter/editorial) | | low-pressure metamorphic terrain, Orrs Island-Harpswell Neck, Maine H. M. LANG AND G . R. DUNN' Department of...26506, USA ABSTRACT Poikiloblastic index minerals in pelitic rocks from the O m Island-Harpswell Neck...Neck area of coastal Maine contain inclusion textures that indicate sequential growth of progressively higher...in the field is garnet, staurolite, staurolite-andalusite, staurolite-sillimanite and sillimanite. Inclusion...staurolite grew during intermediate stages, and andalusite grew relatively late, when transposition of the |  | | Journal (article/letter/editorial) | | 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) 160:591ā607...Dutchess County, NY (Gt zone) Core: alm61sps25prp3grs11 Rim: alm77sps10prp6grs8 Dutchess County, NY (St |  | | Report (edition) | | BULLETIN 41 Third Edition A Collector's Guide to Maine Mineral Localities by Woodrow B. 7KaSVRQ Donald...Vandall T. King Robert G. Marvinney, State Geologist Maine Geological Survey Natural Resources Information...OF CONSERVATION 1998 Copyright Ā© 1998 by the Maine Geological Survey, Department of Conservation. All...24 x JO mm;Jrom the Bennett Quarry, Buckfield, Maine. Mined in 1996 by Holden !Jrothers Mining and currently...Photo by John B. Poisson. The laws and policies of Maine and the United States prohibit discrimination in |  | | Journal (article/letter/editorial) | | Rensselaer Polytechnic Institute, Troy NY, 12180, USA. email: spearf@rpi.edu Corresponding author: pattison@ucalgary...imanite sequences and Buchan-type staurolite-andalusite-sillimanite sequences, there are few examples...staurolite-sillimanite sequences with neither kyanite nor andalusite anywhere in the sequence, despite the wide (~2...features of staurolite-kyanite or staurolite-andalusite mineral assemblages commonly imply no reaction...development (in a prograde sense) of kyanite or andalusite at the expense of staurolite in current phase |  | | Journal (article/letter/editorial) | | from Mica Creek to over 1100 ppm in garnet from Harpswell Neck, while synthetic garnets can contain Ti in...garnet. Harpswell Neck Sample 96-1 is a garnet-grade schist from the Jewel Formation in Harpswell, Maine...GARNET Figure 7. Garnets in sample 96-1 from Harpswell Neck. (a, b, and c) Garnets exhibit core-rim variations...garnets from the garnet-in, staurolite-in (557 Ā°C), andalusite-in (560 Ā°C), and K-feldspar-in zones. As an example...93CW22 of Pattison and Tinkham (2009) from the andalusite-in zone exhibit Ca zoning patterns similar to |  | | Journal (article/letter/editorial) | | Diffusion control of garnet growth, Harpswell Neck, Maine, USA F . S. S P E A R 1 . AND C . G . DAN...Rensselaer Polytechnic Institute, Troy, NY 12180, USA (spearf@rpi.edu) 2 Department of Geological Sciences...NJ, USA ABSTRACT A detailed analysis of chemical zoning in two garnet crystals from Harpswell Neck...Neck, Maine, forms the basis of an interpretation of garnet nucleation and growth mechanisms. Garnet apparently...(1998.) described garnet zone samples from Harpswell Neck, Maine, that had apparently undergone progressive |  | | Book (volume) | | Mineralogy by Vandall T. King and Eugene E. Foord Maine Geological Survey DEPARTMENT OF CONSERVATION Walter...Resources Information, Maine Geological Survey Walter A. Anderson, State Geologist Maine Geological Survey...DEPARTMENT OF CONSERVATION 1994 Copyright Ā©1994 by the Maine Geological Survey, Department of Conservation. All...photograph: Fluorapatite, Pulsifer quarry, Auburn, Maine (2.2 cm specimen), Harvard Mineralogical Museum...Wendell E. Wilson, Ā©1985. The laws and policies of Maine and the United States prohibit discrimination in |  | | Journal (article/letter/editorial) | | Austin, 2275 Speedway Stop C9000, Austin, TX 78712, USA (wcarlson@jsg.utexas.edu) 2 Department of Geosciences...4044 Derring Hall (0420), Blacksburg, VA 24061, USA ABSTRACT A dramatic demonstration of the role of...of garnet in pelitic schist exposed at Harpswell Neck, Maine, USA. Many garnet crystals have irregular...metapelitic rocks found at Harpswell Neck, 123 124 W. D. CARLSON ET AL . Maine, USA, were included among...CHEMICAL EQUILIBRIUM IN METAPELITES AT HARPSWELL NECK, MAINE The findings of Carlson (2002) were set |  | | Journal (article/letter/editorial) | | J. metamorphic Geol., 2000, 18, 59ā66 Andalusiteāsillimaniteāquartz veins as indicators of low-pres... University of Minnesota, Minneapolis MN 55455, USA, (email: whitn008@tc.umn.edu) and 2 Department of...Oxford OH 45056, USA ABSTRACT Ductilely deformed veins consisting of quartz+andalusite, in which the andalusite...andalusite is partially replaced by fibrous sillimanite, locally occur in garnetāsillimanite schist near...mid-crustal rocks. The partial replacement of andalusite by sillimanite may indicate a late-stage increase |  | | Journal (article/letter/editorial) | | these assemblages (i.e. the absence of a clear andalusite-absent zone in the field) is attributed to a...1970; Gibson, 1989a). Instead, aluminosilicate (andalusite and/or fibrolite) is present in all muscovite-bearing...chlorite, biotite, andalusite and sillimanite. Guitard (1970) further subdivides the andalusite zone (his a...and graphite is found in pelitic rocks in the andalusite and sillimanite zones of the Canigou massif,...or partially (Fig. 4b) enclosed in andalusite in the upper andalusite zone (āupperā and ālowerā refer to |  | | Journal (article/letter/editorial) | | 1111/j.1525-1314.2004.00502.x Petrogenesis of andalusiteākyaniteāsillimanite veins and host rocks, Sanandaj-Sirjan...University of Minnesota, Minneapolis, Minnesota 55455 USA (dwhitney@umn.edu) 3 Department of Geology, Tarbiat-Moallem...three coexisting Al2SiO5 polymorphs. In most andalusite and sillimanite schists, the types of polymorphs...host rocks; e.g. vein andalusite is enriched in Fe2O3 relative to host rock andalusite. Low-grade rocks contain...contain andalusite + quartz veins, medium-grade rocks contain andalusite + sillimanite + quartz Ā± plagioclase |  | | Book (volume) | | 0 n101ercai o of Maine j fĀ·~ ....__ :,,. . - .._"' ..;. .. ~ L-- -~ \. ā¢ .J_..::.; I Volume...History, Gems, and Geology edited by Vandall T. King Maine Geological Survey DEPARTMENT OF CONSERVATION Robert...Robert G. Marvinney, State Geologist of Maine Volume 2: Mining History, Gems, and Geology Edited by...Resources Information, Maine Geologi,cal Survey Robert G Marvinney, State Geologist Maine Geological Survey...DEPARTMENT OF CONSERVATION 2000 Copyright Ā©2000 by the Maine Geological Survey, Department of Conservation. All |  | | Report (issue) | | Clearance Center, 222 Rosewood Drive, Danvers, MA 01923, USA, phone (978) 750-8400, http://www.copyright.com...index. ISBN 0-8137-2331-0 1. Geology, Structural--Maine--Norumbega Fault Zone. 2. Geology, Structural--Appalachian...within the Norumbega fault system in south-central Maine. The thin section is cut parallel to the stretching...Norumbega fault system inte, Casco: Bay are: Coastal Maine xc ie 8 fogs bate Oe eS SL Mark T. Swanson | 2...microstructures along the central Norumbega fault zone, Maine .......... 0060 ccc Mary S. Hubbard and Hui Wang |  | | Journal (article/letter/editorial) | | widespread coexistence of the Al2SiO5 polymorphs andalusite and sillimanite, and the occurrence of locally...assemblages, compared to the <100 m wide staurolite+andalusite zone predicted assuming equilibrium. The estimated...the natural rocks, and (4) the persistence of andalusite upgrade of Figure 1. (a) Sample locations (dots)...the low-entropy, chlorite-free staurolite-to-andalusite reaction in the middle part of the aureole and...The clustering of the garnet, staurolite, and andalusite isograds (Fig. 1a), combined with textural evidence |  | | Journal (article/letter/editorial) | | near the garnet isograd found in southwestern Maine (e.g., Spear and Daniel, 2001). Note that zoisite...conditions of the lower garnet zone in southwestern Maine where garnet with spessartine contents of 35% are...diagrams. Phase Quartz Fluidc Kyanite Sillimanite Andalusite Muscovite Biotite Garnet Staurolite Cordierite...Xenotime Melt a b c Quartz H2O Kyanite Sillimanite Andalusite Mg-Celad Fe-Celad Ms Phlogopite Eastonite Annite...garnet from the lower garnet zone in southwest Maine, and the enthalpies of the apatite components, CeF-apatite |  | | Journal (article/letter/editorial) | | Rensselaer Polytechnic Institute, Troy, NY 12180 USA (spearf@rpi.edu) ABSTRACT Cathodoluminescence (CL)...Center, 1 Research Circle, Niskayuna, NY 12309, USA 2009 Blackwell Publishing Ltd et al., 2001; Landtwing...the grain. Although there are too few data Harpswell Neck, ME Eastern VT Western NH Eastern VT ...sillimanite porphyroblast, which is pseudomorphed after andalusite, displays CL zoning in the form of a chiastolite...either staurolite or aluminosilicate (kyanite or andalusite) join the assemblage, shortly after which chlorite |  | | Journal (article/letter/editorial) | | metamorphic province with prograde zoning of andalusiteāsillimanite type (lowpressure series). A detailed...minerals in rocks, the biotite, garnet, stauroliteāandalusite, sillimaniteāmuscovite, sillimaniteāKfeldspar...zoned garnet are widespread in the stauroliteā andalusite zone. To estimate the PT parameters of their...conditions of amphibolite facies. Garnet, staurolite Ā± andalusite, sillimanite, and Kfeldspar isograds have been...member in its core reaches 12ā16 mol % (stauroliteāandalusite zone). In some cases, zoning is complicated by |  | | Book | | Geology of Maine. Conte11ts Preface vii Geology of Maine 7 Coastal Maine 25 Interstate 95 (Maine-furnpike)...tli S / Down East Maine: Bangor ;:incl Elli;worll1 to ( ,.i l:tic.; 1/S Maine 3, Maine 102, ancl rh(.;... Bangor (,a ln,s JOI Central Maine 707 M aine 5: Saco-Bethel / 14 Maine 26: Pegmatite Alley, Portland...ton / 49 Maine 7: Belfast-Dover-Foxcrofl I 57 Maine 15: Bangor-Abhot Village.: / 6 / Maine 11: Milo-Millinocket...ountains of Maine 17 3 U.S. 2: Skowhegan-Bcthc: I 179 M aine 4 : Farmington-Rangcley / 91 Maine 27: Farmington-C~oburn |  | | Journal (article/letter/editorial) | | schists in the Black Hills orogen, South Dakota, USA P. I. NABELEK AND Y. CHEN Department of Geological...Sciences, University of Missouri, Columbia, MO, 65201, USA (nabelekp@missouri.edu) ABSTRACT It is generally...decompression is evident in occurrences of retrograde andalusite and cordierite in the thermal aureole of the...migmatites. Retrograde andalusite zone Helms & Labotka (1991) located an andalusite isograd between the...the staurolite and sillimanite isograd. Andalusite generally occurs in the shear zones and near faults, |  | | Journal (article/letter/editorial) | | plagioclase and staurolite; post-D2 for staurolite and andalusite. The described sequence shows an important metamorphic...phengitic trend (Table 3, analysis 9). Staurolite and andalusite show minor compositional variations in the samples...indication of zoning (Table 3, analyses 10 and 11). Andalusite shows an almost stoichiometric composition (Table...001 0.003 0.236 0.023 12 35.799 63.875 0.000 Andalusite Origin of atoll garnet 251 252 M.D.Ruiz Cruz...could correspond to the eo-Alpine stage. Late andalusite formed during retrogression (stage 4). Inset: |  | | Journal (article/letter/editorial) | | the processes that proceed on the surface of andalusite. The relation ship between growth rate and thermal...regional metamorphic rocks from northwest Connecticut, USA, J. Metamorph. Geol., 1999, vol. 17, pp. 503ā520... Diffusion control of garnet growth, Harpswell Neck, Maine, USA, J. Metamorph. Geol., 2001, vol. 19,...thermobarometry: Garnet Ledge, southeastern Alaska, USA, J. Metamorph. Geol., 2001, vol. 19, pp. 645ā660 |  | | Journal (article/letter/editorial) | | Department of Geological Sciences, University of Maine, Orono, Maine 04469-5790, U.S.A. 0003-004X/99/1112ā1711$05...in the Littleton Schist at Bolton, Connecticut, USA. Journal of Metamorphic Geology, 10, 627ā 636. Christensen...using schists from the Bolton syncline, Connecticut, USA. Journal of Metamorphic Geology, 17, 21ā228. Hobbs...low-pressure metamorphic terrane, Orrs Island ā Harpswell Neck, Maine. Journal of Metamorphic Geology, 8, 199ā216...three-dimensional strain modified uniform distributions: andalusite fabrics from a granite aureole. Journal of Structural |  | | Journal (article/letter/editorial) | | University of Maryland, College Park, MD 20742Ā±4211, USA (mbrown@geol.umd.edu) ABSTRACT Many migmatites...deep granites of the Cascades of Washington state, USA); II. Stepped clockwise path, characteristic of collisional...diatexite, Acadian metamorphic belt, west-central Maine, USA; long dimension of Ā®eld of view is 14 mm. This...some migmatitic metapelites from New Hampshire and Maine. American Journal of Science, 279, 897Ā±935. Dougan...specimens of migmatitic pelites from New Hampshire and Maine. Contributions to Mineralogy and Petrology, 78, |  | | Journal (article/letter/editorial) | | associated with sillimanite, very locally with andalusite (SW Finland migmatites). Finally, ļ¬ne-grained...regional metamorphic rocks from north-west Connecticut, USA. Journal of Metamorphic Geology 17, 503ā520. Diener...metamorphism: Rangeley Formation, New Hampshire, USA. Journal of Petrology 38, 1255ā1277. Kretz, R., 1983... Diffusion control of garnet growth, Harpswell Neck, Maine, USA. Journal of Metamorphic Geology 19, 179ā195 |  | BURGESS, J. L., BROWN, M., DALLMEYER, R. D., STAAL, C. R. VAN (1995) Microstructure, metamorphism, thermochronology and
PāTāt
ādeformation history of the Port aux Basques gneisses, southāwest Newfoundland, Canada*. Journal of Metamorphic Geology, 13 (6) 751-776 doi:10.1111/j.1525-1314.1995.tb00257.x | Journal (article/letter/editorial) | | Park, MD 20742, USA 'Department of Geology, University of Georgia, Athens, GA 30602, USA 'Continental Geoscience...(1993, pp. 374-378). Neither sillimanite nor andalusite were developed in pelites during exhumation of...to the andalusite stability field, but there is no observed reaction of sillimanite to andalusite. Geothermobarometry...Kyanite zone rocks do not develop sillimanite or andalusite during exhumation, which suggests P-T conditions...sillimanite zone rocks, but neither kyanite nor andalusite was produced during the remainder of the exhumation |
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Harpswell, Cumberland County, Maine, USA