Textural and Mineral-Chemistry Constraints on Columbite- Group Minerals in the Penouta Deposit: Evidence from Magmatic and Fluid-Related Processes
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The Wodginite Group. Iii. Classification and New Species
633 Canadian Mineralogist Vol. 30, pp. 633-638(1992) THE WODGINITE GROUP. III. CLASSIFICATION AND NEW SPECIES T. SCOTT ERCITI, PETRIERNY eNp FRANK C, HAWTHORNE Deportmentof GeologicalSciences, University of Manitoba, Winnipeg,Manitoba R3T 2N2 ABSTRACT The minerals constituting the wodginite group are isostructural oxides, with the generalformula ABC2Oy (Z = 4);A = Mn2*, Fd*, Li, E B : Sn4*, Ti, Fe3*, Ta;C : Ta, Nb. A classificationsystembased onthe chemistry of the .,4-and B-cationsites has been devised; it useschemical modifiers in conjunctionwith the root name"wodginite". Wodginite itself has the generalformula MnSnTa2Os;two new membersof the wodginite group are charactedzed here:-ferrowodginite, F/+SnTa2Os and titanowoiginite, MnTiTa2Os. Ferrowodginite occurs as 0.01- to- 0.2-mm inclusionsin cassiteritefrom a granitic pegmatitenear Sukula, southwestemFinland. It is dark brown to black' has a dark brown streak, vitreous luster, is optically anisotropic with all n>2, and is nonfluorescent.The calculated density is 7.02 g/cm3; it is brittle, H 5%, without cleavage;it has an irregular fracture. The averagechemical composition(wt. Vo)is: MnO 2.8, FeO 9.3, Fe2O31.9, TiO2 4.3, SnO210.1, Nb2O5 14.8, Ta2O5 56.3, total 99.4.The strongestfivelines in the X-ray powderpauein-are:4.16('50),'2.g7(Aq,2.55(30i, 2.493(40\ {nd 1.a55(30)A. fne unit-cell parametersare o 9.415(7),b 11.442(6),c 5.103(4)A, B 90.8(l)', V 549.'7(6)Ar, spacegroup A/c. Titanowodginiteoccurs as euhedral,diamond-shaped crystals up to I cm acrossat the Tanco pegmatite,Bernic Lake, Manitoba. -
The Crystal Ghemistry of Complex Niobium and Tantalum Oxides Ll. Composition and Structure of Wodginite
American Mineralogist, Volume 59, pages 1040-1044, 1974 TheCrystal Ghemistry of ComplexNiobium and Tantalum Oxides ll. Compositionand Structure of Wodginite J. Gnermu, axo M. R. TnonNsnn Diaision of Mineralogy, CSIRO, Floreat Park, Iilestern Australia, 6014 Abstract The structure of wodginite (non-centrosymmetric monoclinic space group Cc; ideal formula, MnXtX[lao,, where site Xg contains 5-valent ions (and all the niobium) and the average valency of cations in site X, is 4) was determined by film methods to be an ordered form of tho ixiolite structure. The a and D cell edges and angle B increase with manganesb content, whereas c remains constant for wodginites from five localities in Western Australia. Composition and Lattice Parameters from Wodgina, hand picked from a homogeneous The charasteristicsof the mineral wodginite were region of a polished section.Electron probe analysis clearly describedby Nickel, Rowland, and McAdam and powderX-ray diffraction (Hiigg Guinier focussing (1963) for samplesof the mineral from Wodgina, camera) gave the cell dimensibnsand composition Australia, and Bernic Lake, Manitoba. The s,truc- usedin the calculationsshown in Table l. Data were ture was not fully defined, and the efiect of com- collectedphotographically along two axes([010] and positionalvariations on the st,ructurecould not there- Ul2l) using a Nonius Integrating Weissenberg fore be discussed. camera, equiinclination geometry,and CuKa radia- Table 1 shows the compositions and lattice tion. After the applicationof Lorenz and polarization parametersof wodginitesfrom five localitiesin West- corrections, these two sets of data were inter-cor- ern Australia and the averageparameters quoted by related, and symmetrically similar reflections were Grice, eerny and Ferguson (1972) fbr the wod- averagedto give 555 independentobservations. -
First U.S. Occurrence of Wodginite from Powhatan County, Virginia
American Mineralogist, Volume 69, pages 807-809, 1984 First U.S. occurrenceof wodginitefrom PowhatanCounty, Virginia MrcHeel A. WIse eNo Pnrn er,nNf Department of Earth Sciences, University of Manitoba Winnipeg, Manitoba R3T 2N2 Canada Abstract Wodginite occurs as black subhedral grains in the Be, Nb-Ta, Sn bearing Herbb #2 pegmatite in Powhatan County, Virginia. The wodginite is associatedwith amazonite and topaz in the intermediate zone of the pegmatite. Other Nb-Ta-bearing minerals found associated with wodginite are cassiterite, in part as inclusions in wodginite, and par- tially ordered man6ianocolumbite.The Herbb wodginite is compositionally similar to previ- ously studied wodginitesand has an averageformula (Mnz.aoFe?.1sb+.or(Snz.oqTirrcTaost Fd.14)x.8e(Ta7.ozNbos8)>8.0oOrz.The average unit cell dimensions ate a 9.471(2), b tt.43t(2),c 5.108(l)A, p90"47'(t),v 553.1(l)43. Introduction ite), quartz and muscovite are the dominant minerals present. Beryl, topaz, columbite-tantalite,wodginite, A black mineral, at first believed to be columbite- cassiterite,and minor spessartinealso occur in the peg- tantalite, was collected by the first author from the Herbb matite, mainly in the clayey decomposition products. #2 pegmatite in Powhatan County, central Virginia. Wodginite is found scatteredthroughout the kaolinized Griffitts et al. (1953) noted "small lustrous tabular to feldsparof the intermediatezones. Veinlets of wodginite equant crystals of columbite-tantalite"in albitized por- also occur near perthitic amazonitebodies and to a lesser tions of this pegmatite,a speciesalso quotedby Jahnset eitent are also associatedwith topaz. al. (1952).Recent examination of Nb,Ta-bearingminerals from this locality has led to the identification of the rare Physical properties Mn,Sn,Ta-oxidemineral, wodginite. -
Crystallization Processes and Solubility of Columbite-(Mn), Tantalite-(Mn), Microlite, Pyrochlore, Wodginite and Titanowodginite in Highly Fluxed Haplogranitic Melts
Western University Scholarship@Western Scholarship@Western Electronic Thesis and Dissertation Repository 3-12-2018 10:30 AM Crystallization processes and solubility of columbite-(Mn), tantalite-(Mn), microlite, pyrochlore, wodginite and titanowodginite in highly fluxed haplogranitic melts Alysha G. McNeil The University of Western Ontario Supervisor Linnen, Robert L. The University of Western Ontario Co-Supervisor Flemming, Roberta L. The University of Western Ontario Graduate Program in Geology A thesis submitted in partial fulfillment of the equirr ements for the degree in Doctor of Philosophy © Alysha G. McNeil 2018 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Earth Sciences Commons Recommended Citation McNeil, Alysha G., "Crystallization processes and solubility of columbite-(Mn), tantalite-(Mn), microlite, pyrochlore, wodginite and titanowodginite in highly fluxed haplogranitic melts" (2018). Electronic Thesis and Dissertation Repository. 5261. https://ir.lib.uwo.ca/etd/5261 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected]. Abstract Niobium and tantalum are critical metals that are necessary for many modern technologies such as smartphones, computers, cars, etc. Ore minerals of niobium and tantalum are typically associated with pegmatites and include columbite, tantalite, wodginite, titanowodginite, microlite and pyrochlore. Solubility and crystallization mechanisms of columbite-(Mn) and tantalite-(Mn) have been extensively studied in haplogranitic melts, with little research into other ore minerals. A new method of synthesis has been developed enabling synthesis of columbite-(Mn), tantalite-(Mn), hafnon, zircon, and titanowodginite for use in experiments at temperatures ≤ 850 °C and 200 MPa, conditions attainable by cold seal pressure vessels. -
The Garnet Line in Oxford County, Maine Pegmatites
University of New Orleans ScholarWorks@UNO University of New Orleans Theses and Dissertations Dissertations and Theses Fall 12-18-2014 The Garnet Line in Oxford County, Maine Pegmatites. Myles Mathew Felch The University of New Orleans, [email protected] Myles M. Felch [email protected] Follow this and additional works at: https://scholarworks.uno.edu/td Part of the Geology Commons Recommended Citation Felch, Myles Mathew and Felch, Myles M., "The Garnet Line in Oxford County, Maine Pegmatites." (2014). University of New Orleans Theses and Dissertations. 1915. https://scholarworks.uno.edu/td/1915 This Thesis is protected by copyright and/or related rights. It has been brought to you by ScholarWorks@UNO with permission from the rights-holder(s). You are free to use this Thesis in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights- holder(s) directly, unless additional rights are indicated by a Creative Commons license in the record and/or on the work itself. This Thesis has been accepted for inclusion in University of New Orleans Theses and Dissertations by an authorized administrator of ScholarWorks@UNO. For more information, please contact [email protected]. The Garnet Line in Oxford County, Maine Pegmatites. A Thesis Submitted to the Graduate Faculty of the University of New Orleans in partial fulfillment of the requirements for the degree of Master of Science in Earth and Environmental Sciences By Myles Felch B.A., University of Maine at Farmington, 2012 December 2014 © 2014, Myles M. -
The Maine Geologist
The Maine Geologist NEWSLETTER OF THE GEOLOGICAL SOCIETY OF MAINE June 2018 Volume 44 Number 2 PRESIDENT’S MESSAGE We have earned an enjoyable Maine summer! think about how you might respond to her invitation This edition of The Maine Geologist is packed with in this Newsletter. reports of how busy we were this spring. The GSM Also in the Newsletter, you will find an update Spring Meeting at Unity College was a wonderful on the Anderson Fund Committee, which is excited success, with a full afternoon of student research about increasing the capacity of GSM to fund new presentations from eight schools across Maine. The initiatives in geoscience education in Maine. That abstracts are printed below for you to ponder at your committee has been working hard and will continue leisure. I marvel at how the curiosity of students and to meet over the summer. their advisors leads them to investigate not only I am especially grateful for the work of the distant places, but also their own neighborhoods. We Executive Council, who I have called upon more heard about geology from across four continents as than usual this spring. Sarah stepped up to run the well as from beneath the campus where we were Spring Meeting in my absence, which she did gathered. beautifully, Bruce has done a significant amount of I especially want to mention Alex Bloomer as an financial research related to the dues issue and the example of how geoscience education is happening Anderson Fund, and I have sent Amber scrambling in new ways. Alex is a student at Bangor High after web site upgrade information. -
Exsolution of Zirconian-Hafnian Wodginite from Manganoan-Tantalian Cassiterite, Annie Claim #3 Granitic Pegmatite, Southeastern Manitoba, Canada
685 The Canadian Mineralogist Vol. 38, pp. 685-694 (2000) EXSOLUTION OF ZIRCONIAN-HAFNIAN WODGINITE FROM MANGANOAN-TANTALIAN CASSITERITE, ANNIE CLAIM #3 GRANITIC PEGMATITE, SOUTHEASTERN MANITOBA, CANADA MORGAN MASAU, PETR CERNˇ Y´ § AND RON CHAPMAN Department of Geological Sciences, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada ABSTRACT Primary (Mn,Fe,Ta,Nb)-bearing cassiterite with ≤0.21 wt.% ZrO2 and ≤0.05 wt.% HfO2 crystallized during the consolidation of the Archean Annie Claim #3 zoned, lepidolite-subtype granitic pegmatite, southeastern Manitoba, in amounts increasing from the outer to the inner pegmatite zones. Rare inclusions of tantalite and ferrotapiolite originated from transient local saturation in these phases. Sparse early cassiterite from the outer intermediate zone is rather rich in substituting elements and in part Fe- dominant, whereas the more abundant late cassiterite from the lepidolite core is strongly Mn-dominant and poor in the substituents. Exsolution in the primary cassiterite generated granular zirconian-hafnian ferrowodginite and wodginite enclosed in veinlets of substituent-depleted cassiterite. The Fe/Mn and Nb/Ta values of the wodginite phases mimic those of the primary cassiterite across the pegmatite zones, and Zr/Hf perceptibly decreases from the outer zones inward. Maximum contents of ZrO2 and HfO2 (5.98 and 1.59 wt.%, respectively; 0.31 Zr and 0.04 Hf apfu) are the highest so far encountered in wodginite-group minerals. These maxima characterize wodginite exsolved from early cassiterite; the levels drop off in wodginite exsolved in late cassiterite. Instead, hafnian zircon intergrown with abundant thorian coffinite becomes abundant in the lepidolite core, indicating a transition of Zr + Hf from octahedral sites in the oxide minerals to the much more common 8-fold coordination in the orthosilicate; this shift implies a transition from relatively alkaline to more acidic conditions. -
Field Relations, Petrography and Provenance of Mafic Dikes, Western Maine David Gibson University of Maine at Farmington, [email protected]
Bates College SCARAB New England Intercollegiate Geological Conference NEIGC 2017 Day Three: October 1 2017 Oct 1st, 2017 C2: Field Relations, Petrography and Provenance of Mafic Dikes, Western Maine David Gibson University of Maine at Farmington, [email protected] Donald Osthoff University of Maine at Farmington Chase Rerrick University of Maine at Farmington Follow this and additional works at: http://scarab.bates.edu/neigc2017 Part of the Geology Commons Recommended Citation Gibson, D., Osthoff, D., and Rerrick, C., 2017, Field Relations, Petrography and Provenance of Mafic Dikes, Western Maine in Johnson, B. and Eusden, J.D., ed., Guidebook for Field Trips in Western Maine and Northern New Hampshire: New England Intercollegiate Geological Conference, Bates College, p. 273-286. https://doi.org/10.26780/2017.001.0015 This Event is brought to you for free and open access by the Conferences and Events at SCARAB. It has been accepted for inclusion in New England Intercollegiate Geological Conference 2017 by an authorized administrator of SCARAB. For more information, please contact [email protected]. C2-1 FIELD RELATIONS, PETROGRAPHY AND PROVENANCE OF MAFIC DIKES, WESTERN MAINE. David Gibson [email protected], Donald Osthoff and Chase Rerrick. Department of Geology, University of Maine at Farmington, Farmington, Maine 04938. INTRODUCTION In his 1965 report on the Geology of the Bryant Pond quadrangle, Maine, C.V. Guidotti mapped some 65 mafic dikes within this field area. However, his rather enigmatic map (see Figure 2 of his report) served only to inspire a group of undergraduates and their advisor to further investigate these intrusions. Guidotti (1965) assigned a preliminary Triassic age to these intrusions but to date no accurate age determinations have been performed on these rocks. -
Carboniferous Metamorphism on the North (Upper) Side of the Sebago Batholith
University of New Hampshire University of New Hampshire Scholars' Repository New England Intercollegiate Geological NEIGC Trips Excursion Collection 1-1-1986 Carboniferous metamorphism on the north (upper) side of the Sebago Batholith Guidotti, C.V. Gibson, D. Lux, D.R. DeYoreo, J. Cheney, J.T. Follow this and additional works at: https://scholars.unh.edu/neigc_trips Recommended Citation Guidotti, C.V.; Gibson, D.; Lux, D.R.; DeYoreo, J.; and Cheney, J.T., "Carboniferous metamorphism on the north (upper) side of the Sebago Batholith" (1986). NEIGC Trips. 404. https://scholars.unh.edu/neigc_trips/404 This Text is brought to you for free and open access by the New England Intercollegiate Geological Excursion Collection at University of New Hampshire Scholars' Repository. It has been accepted for inclusion in NEIGC Trips by an authorized administrator of University of New Hampshire Scholars' Repository. For more information, please contact [email protected]. TRIP C-4 m It£ NORTH ( UPPER ) SIDE Q£ IME. SEBAGO By C.V. Guldottl1, D. Gibson1, D.R. Lux1,0J. De Yoreo1, 2 and J.T. Cheney ( U n l v . of Maine, Orono, Maine. (2) Amherst College, Amherst, MA Until recently the high-grade metamorphism In western Maine was routinely accepted as Devonian In age. Initially, only a single Devonian event was assumed and Pankiwskyj (1965) appears to have been the first worker to tentatively suggest the existence of more than one Devonian metamorphism. Subsequently, Guldottl (1970) described explicitly at least three Devonian metamorphisms. The most recent overviews of the Devonian metamorphic events In central and western Maine have been given by Holdaway et al. -
Cation Distribution in Partially Ordered Columbite from the Kings Mountain
American Mineralogist, Volume 76, pages 1897-1904, 1991 Cation distribution in partially ordered columbite from the Kings Mountain pegmatite,North Carolina M,qnc WnNGrn.TrroNr.ts Anrvrnnusrnn I-aboratorium fiir chemischeund mineralogischeKristallographie, Universitit Bern, Freiestrasse3, CH-3012 Bern, Switzerland Cnlllns A. Gnrcnn BayerischesForschungsinstitut {iir experimentelle Geochemie und Geophysik, Universitdt Bayreuth, Postfach IOl25l, D-8580 Bayreuth, Germany ABSTRAcT Two columbite samples,space group Pbcn, with a : 14.233,b : 5.724,c : 5.104 A, Z: 4 and a: 14.221,b : 5.727,c : 5.102A, of similar chemistry(average composition FeourMno.roTi005Nb.TaorOu)but from different rock types of the Kings Mountain peg- matite, North Carolina, were investigated. One columbite specimen (NCP5) originates from a primary spodumene pegmatite, the other (NCPI) from a rock composed mainly of sugaryalbite formed by subsequenthydrothermal activity. Single-crystalX-ray structure refinements indicate that both columbite samplesshow strong disorder between (Nb,Ta) and (Fe,Mn) on octahedral A and B positions. This is in agreementwith a Mdssbauer spectrum (NCP5), which was fitted with two doublets characteristicof two distinct t61Fe2+ sites. Both samples show strong chemical zoning with respect to Nb and Ta, but weak zoning of Fe and Mn. The similar chemical composition and cation ordering indicate that columbite in both rocks is formed by the same process.Late hydrothermal alteration of the original spodumenepegmatite did not affect the composition of the earlier crystallized columbite. The primary columbite (NCP5) shows slightly stronger disorder of two- and five-valent cations than columbite (NCPI) found in the hydrothermally altered part of the pegmatite. INrnonucrroN some samplesreveal a wodginite pattern (Khvostova and Maximova, 1969),whereas others yield a columbite pat- Minerals of the columbite-tantalite group have the gen- tern (Nickel et al., 1963b). -
Alkali Oxide-Tantalum Oxide and Alkali Oxide-Niobium Oxide Ionic Conductors
NASA CR-1 34599 .Aft ALKALI OXIDE-TANTALUM OXIDE AND ALKALI OXIDE-NIOBIUM OXIDE IONIC CONDUCTORS by R. S. Roth, H. S. Parker, W. S. Brower and D. Minor prepared for NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CONTRACT C-29933C NATIONAL BUREAU OF STANDARDS WASHINGTON, D.C. 20234 1 1 Report No. 2. Government Accession No. 3. Recioient's Catalog No. CR-134599 NBSIR 7L-LL0 A Tit I a t r-v /-4 Ci it^titla H. 1 iiie ana oudiiti6 5. Report Date ALKALI OXIDE-TANTALUM OXIDE AND ALKALI OXIDE-NIOBIUM OXIDE April 1974 IONIC CONDUCTORS 6. Performing Organisation Code 7. Author(s) 8. Performing Organization Report No. R. S. Roth, H. s. Parker, W. S. Brower and D. Minor 10. Work Unit No. 9. Performing Organization Name and Address YOK 5650 National Bureau of Standards 11. Contract or Grant No. Washington, D.C. 20234 C-29933C 13. Type of Report and Period Covered Final Report 12. Sponsoring Agency Name and Address October 1972 - October 1973 National Aeronautics and Space Administration Lewis Research Center 14. Sponsoring Agency Code 21000 Brookpark Road Cleveland, Ohio 44135 15. Supplementary Notes Project Manager: Patricia O'Donnell 16. Abstract A search was made for new cationic conducting phases in alkali-tantalate and niobate systems. The phase equilibrium diagrams were constructed for the six binary systems ^'^2°5"-^^^'^°3' Nb^O^-NaNbO^, Nb^O^-KNbO^, Ta^O^-NaTaO^ , Ta^O^-LiTaO^ and Ta^O^-KTaO^. Various other binary and ternary systems were also examined. Pellets of nineteen phases were evaulated <by the sponsoring agency) by dielectric loss measurements. -
Left Panel Gulino
Christopher P. Gulino1, Gary S. Solar1, Structural, textural and petrographic variations in rocks [email protected] and Paul B. Tomascak2 on Bruce Hill, eastern Sebago Migmatite Domain, 1 Laboratory for Orogenic Studies, Department of Earth Sciences SUNY College at Buffalo, Buffalo, NY 14222 2 Buffalo State southern Maine. Department of Earth Sciences, SUNY Oswego, Oswego, NY 12326 State University of New York Department of Earth Sciences REGIONAL GEOLOGICAL MAP OF THE SE SEBAGO PLUTON, E SEBAGO MIGMATITE DOMAIN AND ADJACENT NORUMBEGA SHEAR ZONE SYSTEM, S ME Introduction 70°30’ W 70°15’ W 44°00’ N 70°00’ W Results: Rock Types If magma flow through deforming rocks is recorded by structures in migmatites and associated granites, 25 26 ROCK TYPES Ms-Bt granite, Bt granite, schleiric granite, pegmatite A n y Rocks at Bruce Hill are of five units that are all typical of the SMD in general, but a study of such rocks requires multiple scales of observation. As part of a larger multi-disciplinary study of d stromatic migmatite, diatexite B r with associated schlieric C o g n r s i granite, foliated granite, 21 t o c 20 e 19 e granite, pegmatite o S o particularly of the eastern SMD. Stromatic migmatite is the dominant rock unit on k rocks of the northern Appalachian migmatite-granite belt, this study is one of several ongoing concurrent g 68 m e g 14 y Hbl-bearing granite E r d i r n e 86 syenite (Rattlesnake Mtn. R B M R 67 i igneous complex) v i A v the NW and SE flanks of the hill, and is uniformly plastically deformed, including e 06 35 and related projects that together form a database of fine-scale documentation of the Sebago migmatite e gabbro, metagabbro r 69 74 84 r 55 Standish Form.