 | | 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 ©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, ©1985. The laws and policies of Maine and the United States prohibit discrimination in |  | | Book (volume) | | 0 n101ercai o of Maine j f·~ ....__ :,,. . - .._"' ..;. .. ~ L-- -~ \. • .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 ©2000 by the Maine Geological Survey, Department of Conservation. All |  | | Journal (article/letter/editorial) | | Muscovites from PeliticSchistsof the PuzzleMountainArea, Maine Jouw T. CnBNBv, eNo Cnanr,Bs V. Guroorrr Department...microprobe analysesof muscovite from 32 Puzzle Mountain (Maine) meta pelites reveal that paragonite (Pg)...pseudomorphs after staurolite in the RangeleyOquossocarea (Maine) representequilibrium features of prograde metamorphismfrom...from metapelitesfrom Puzzle Mountain, Maine (Fig. 1). The pelitic schists of the Puzzle Mt. area are SilurieDevonian...vary from lower sillimanite to sillimanite * K-feldspar gradesof metamorphism. Geologic mapping has been |  | | Journal (article/letter/editorial) | | Department of Geological Sciences, University of Maine, Orono, Maine 04469, U.S.A. ABSTRACT An extensive natural...natural biotite data set from western Maine constrains the temperature and crystalchemical controls on the...metamorphism of the Acadian Orogeny of western Maine is ideal for this approach in that metamorphism...metamorphic grades (garnet through sillimanite-K-feldspar zones), mineral assemblages, and bulk compositional...muscovite is no longer present in the sillimanite-K-feldspar zone, there is no longer a phase that saturates |  | Pattison, D. R. M., Spear, F. S., Debuhr, C. L., Cheney, J. T., Guidotti, C. V. (2002) Thermodynamic modelling of the reaction muscovite+cordierite→Al2SiO5+biotite+quartz+ H2O: constraints from natural assemblages and implications for the metapelitic petrogenetic grid. Journal of Metamorphic Geology, 20 (1) 99-118 doi:10.1046/j.0263-4929.2001.356.356.x | Journal (article/letter/editorial) | | Rensselaer Polytechnic Institute, Troy, NY, 12180, USA 3 GR Petrology Consultants Inc., 4605 12 Street N...01002, USA 5 Department of Geological Sciences, University of Maine, Orono, ME, 04469±5790, USA 2 ABSTR... Fe; Mg2 Al4 Si5 O18 :nH2 O 2 Bt 8 And=Sil K Fe; Mg3 AlSi3 O10 OH2 Al2 SiO5 7 Qtz SiO2 3n...or K2O±MgO±Al2O3±SiO2±H2O (KMASH) systems: the K-feldspar-absent invariant point [Kfs] and the chlorite-absent...(Pattison & Jones, 1993; DeBuhr, 1999), Onawa aureole, Maine (Symmes & Ferry, 1995), McGerrigle aureole, Quebec |  | | Journal (article/letter/editorial) | | Department of Geological Sciences, University of Maine, Orono, Maine 04469, U.S.A. 3 Department of Geological...samples from the well-studied occurrences in western Maine to allow consideration of our results within a tightly...petrologic/mineralogic framework exists in western Maine for undertaking our proposed study of metapelite...purposes. Moreover, although the rocks in western Maine have experienced polymetamorphism, the papers by...Finally, some upper sillimanite and sillimanite + K-feldspar zone metapelites were selected from the Bryant |  | | Journal (article/letter/editorial) | | 18-29 9 Springer-Verlag 1982 Sillimanite-Potash Feldspar Assemblages in Graphitic Pelites, Strontian Area...metamorphic zonation. The Sillimanite Zone (in which K feldspar does not occur witla sillimanite) is succeeded...succeeded by the Muscovite-Sillimanite-K feldspar Zone, Sillimanite-K feldspar Zone (without primary muscovite)...Cordierite-K feldspar Zone. Secondary muscovite from retrograde hydration of sillimanite+K feldspar is distinguished...are confined to the Sillimanite-K feldspar and Cordierite-K feldspar Zones. Muscovite compositions are |  | | Journal (article/letter/editorial) | | of Geological Sciences,University of Maine at Orono, Orono, Maine 04469, U.S.A. Dvln M. D.llnv Department...biotite from metapelitic rocks of northwestern Maine was accumulated in the context of metamorphic grade...substitution models for biotite. Two such substitutions are: K*, Na* + H:O* and Tio* + octahedralvacancies= 2(Rt')...samplesare from Areas A and B of Figure I in western Maine. Both areas are underlain mainly by 16l t62 ...CAMBRO-ORDOV|C|AN AND SILURGDEVONIAN (SD) ilETAMORPHIC GRADES K+S= KSP + SILL US = UPPERSILLIMANITE ZONE LS = LOWERSILLIMANITE |  | | Journal (article/letter/editorial) | | Fig. l. Sketch map of study area in south-central Maine. DSv: Vassalboro Formation; Sw: Waterville Formation;... X,, I r Garnet Fe (re+g) 1000k0 Biotite X^ K. Fe rte+vgl X_. Ir X T- ^ T^ Al Tc_A X^, Af...muscovite NaA13Si3OI0(OH)2+ andalusite A12Sio5 K-feldspar KAlSi308 = S1O2 garnet + quartz andalusite...sillimanite + K-feldspar isogradwasmapped in the area, sample388,4'would lie in a sillimanite + K-feldspar zone...508oC; sillimanite zone, 548"C; sillimanite * K-feldspar zone.565oC. Biotite-garnet temperatures in Table |  | | Journal (article/letter/editorial) | | Institute of Technology, Pasadena, California 9t 125, USA Offprint requests to: A.P.S. Reymer * Present address:...dioeite~~zdioritesand granodiorltes i4" t Sill K-feldspargn,e~s Tonolilicgnei~withserpenlinite i-...assemblage cordierite_+ aluminium silicate + K-feldspar + garnet + biotite. The granitic gneisses form...along grain boundaries and growing into quartz and feldspar grains. Cordierite was found at one locality (#...variations of the critical Fe/Mg and N a / C a + K ratios were in fact invariably much less than this |  | | Journal (article/letter/editorial) | | produced the retrograde assemblages chlorite-K-feldspar-celadonitic muscovite-sphene-anatase±pyrite (common)...During retrograde metamorphism, the exchange reactions K ^ Na, Mn ^ Fe+Mg, and Fe ^ Mg proceeded while more...breakdown. Coexisting biotite and muscovite became more K rich during biotite breakdown. Muscovite also became...zoned with respect to M + 2 /(M + 2 +A1 / F ) and K/(K+Na) ratios, which are higher in muscovite rims.... domes extending from Long Island Sound to the Maine-New Hampshire border (Thompson and others, 1968; |  | | Journal (article/letter/editorial) | | Krogstad Richard J. Walker Nature of the crust in Maine, USA: evidence from the Sebago batholith Received:...sources: Avalon-like crust (eNd.23), and Central Maine Belt metasedimentary rocks (eNd,24), without material...Maryland at College Park, College Park, MD 20742, USA Editorial responsibility: J. Patchett Introduction... 46 boniferous Sebago batholith in southwestern Maine is the largest exposed granitic pluton in New England...lithotectonic units (BH Bronson Hill Belt, CMB Central Maine Belt, MB Merrimack Belt, PN Putnam-Nashoba Belt) |  | | Journal (article/letter/editorial) | | dioctahedral micas in metamorphic sequences from western Maine M.F. Brigatti,1,* C.V. Guidotti,† D. Malferrari...granodioritic bodies occurring in three areas of western Maine. The metamorphic mineral zones identified by mineral...Upper Sillimanite Zone (USZ), and the K-feldspar + Sillimanite Zone (K + SZ). The muscovite compositions...granites). In trioctahedral micas from western Maine and especially in those with graphite, there are...composition. Keywords: Biotite, muscovite, western Maine, crystal chemistry, crystal structure Introduction |  | | Journal (article/letter/editorial) | | the western 70 percent of the Augusta quadrangle, Maine, has shown that this metamorphic terrane consistsof...report the results of a moderately detailed sentedin Maine by the distribution of isogradswhich study of metamorphismin...assemblagesin the pelitic Mainq state to sillimanite-K feldspar in the southwest that amphibolite facies conditions...throughout vailed of metamorphismof pelitic rocks in Maine have been played an important role in polymetamorphism...complicatedetailed petrologic studiesand make acmetamorphism in Maine through a better underwhich occurred in rPresentaddress:Air |  | | Journal (article/letter/editorial) | | of Geological Sciences* Harvard University, 24 Oxford Street, Cambridge, MA 02138 (Received 19 December...is located in the western part of the Lovewell Mountain and the eastern part of the Bellows Falls 15 minute...belong to a second and higher nappe, the Fall Mountain nappe (Figs. 2 and 3). My structural analysis...+ plagioclase + ilmenite + muscovite + alkali feldspar. The compositions of 200 minerals from 70 thin... \. " — \ \ N V t V • • \ / c1 SUM 1 K lometers 2 •* j . \ \ 0 '^1 • BOYNTON HILL |  | | Journal (article/letter/editorial) | | d b y the d i s c o v e r y of v e r y old r o c k s ( > 2500 M a ) in m o s t of the w o r l d ' s P...e of h e a t - p r o d u c i n g e l e m e n t s (K, U , T h ) 3 - 4 G a a g o r e q u i r e s t h a t...zircon, apatite and sphene. More aluminous a n d / o r K-rich samples contain muscovite and, in a very few...in these samples, and the absence of potassium feldspar was established by examining stained slabs. A...equilibration with inclusions of biotite, staurolite, feldspar, ilmenite, etc. The presence of curved inclusion |  | | Report (volume) | | STABLE ISOTOPE MONITORS MODELLING THERMAL REGIMES K. P. FURLONG, R. B. HANSON & J. R. BOWERS KINETICS...AUREOLE TECTONICS S. R. PATERSON, R. H. VERNON & T. K. FOWLER, JR. AUREOLE SYSTEMATICS M. D. BARTON, J...Ribbe SULFIDE MINERALOGY 1983 362 P. H. Ribbe FELDSPAR MINERALOGY (2nd edition) out of U.S.A. Editor(s)...GEOCHEMISTRY A. F. White 24 1990 314 J. Nicholls J. K. Russell MODERN METHODS OF IGNEOUS PETROLOGY— UNDERSTANDING...Facies series 2, Type 2a The Cupsuptic aureole, Maine The Kiglapait aureole, Labrador Other aureoles of |
|
