 | | Journal (article/letter/editorial) | | MetallogenicEpochsand MetallogenicProvincesof the Estrie-Beauce Region,SouthernQuebecAppalachians* MICHEL...studies. 0361-0128/94/1611/1322-3954.00 1322 ESTRIE-BEAUCEREGION, QUEBEC:EPOCHS& PROVINCES The great...great variety of mineraldeposittypesin the Estrie-Beauceregion becameapparentto prospectorsin colonialtimesof...generaldeclinein mineral explorationthroughoutthe Estrie-Beauceregion. This decline was not due to the exhaustion...stimulateexplorationactivityandevaluatethe mineralpotentialof the Estrie-Beauce region, the MinistArede l'Energie et des |  | | Report (issue) | | Geological Survey of Canada Miscellaneous Report 46 ROCKS AND MINERALS FOR THE COLLECTOR Estrie and Gaspesie... © Minister of Supply and Services Canada 1992 Available in Canada through authorized bookstore agents...bookstores or by mail from Canada Communication Group - Publishing Ottawa, Canada K1A OS9 and from Geological...Geological Survey of Canada offices: 601 Booth Street Ottawa, Canada KlA OE8 3303-33rd Street N.W., Calgary...available for reference in public libraries across Canada Cat. No. M41-8/46E ISBN 0-660-14391-7 Price subject |  | | Journal (article/letter/editorial) | | ..................................... The Mandy Mine ............................................ The...Northpines Pyrite Mine, Ontario ................................. The Eustis Mine, Quebec ....... : ...few examplesof ore bodiesof this generaltype in Canada were studied in the field and in the laboratory...quantity; always minor quantitiesof quartzand magnetite;and sometimes smallamounts of pyrite. The matrix...albite-oligoclase, hornblende,biotite, apatite, titanite, magnetite, zircon, chlorite, zoisite, epidote, and sericite |  | | Journal (article/letter/editorial) | | Appalachian uplift lies wholly to the south of the Saint Lawrence river. It comprises two somewhat distinct...mountainous region of the Gaspe peninsula along the lower Saint Lawrence and the hilly country from the Chaudiere...surveyed until some thirty years after the cession of Canada to England. I t was then divided into townships...remote from the Saint Lawrence valley. The principal rivers, such as the Yamaska, Saint Francis, Nicolet...angles to their course and drain the region into the Saint Lawrence. The tributaries of these rivers take their |  | | Report (chapter) | | cyclicity or eustasy (e.g. Bloemendal & deMenocal 1989; Weedon et al. 1999) because changes in climate cause changes...commonly pyrite and siderite, are formed and magnetite is lost (Karlin & Levi 1983, 1985; Ellwood et...small amount of ferrimagnetic minerals, like magnetite, were used, the x values were observed to lie...normal marine x values. Magnetic susceptibility in magnetite is extremely high, even in very small amounts...STRATIGRAPHY diamagnetic and paramagnetic compounds, magnetite content must be extremely low. Certainly there |  | | Report (issue) | | I. DREVER K. C. DUNHAM,R. N. THOMPSONa� D. S. WEEDON ITINERARY I. II. 111. IV. V. VI. Introduction...DREYER, K. C. DUNHAM, R. N. THOMPSON and D. S. WEEDON . I TfWOUCTION by G. M. BROW1 THE ISLE OF SKYE...reinvestigation in the 1940s, and later, with D. S. Weedon and other re earch tudcnts. of what Harker had...boron-fluorine pneumatolysis, and the introduction of magnetite in appreciable quantities. Particular attention...ilchrist Old Manse. Garnet, idocrase, monticellite, magnetite and copper sulphides are easily found. Commonest |  | | Report (chapter) | | as proxies for climate (Weedon & Jenkyns 1990; Weedon & Shimmield 1991; Weedon et al. 1999), are being...cyclicity (Mead et al. 1986; Hartl et al. 1995; Weedon et al. 1999; Jovane et al. 2006, 2007; Ellwood...mineral responsible for that component of k. For magnetite this temperature is c. 580 8C. In some instances...marine rocks, this phase is often found to be magnetite, and this breakdown behaviour has been observed...studies is that x can serve as a proxy for climate (Weedon et al. 1999, 2011a; Ellwood et al. 2000; Jovane |  | | Journal (article/letter/editorial) | | Department of Geology, University of Toronto, Toronto 5, Canada SUMMARY. A group of ultrabasic dykes occurring...clinopyroxene, with accessory chrome spinel and magnetite, but the relative amounts of the three major constituents...Sgurr Dubh intrusion and have been attributed by Weedon (1965, p. 65) to autobrecciation, although he does...Sgurr Dubh intrusion and the features described by Weedon (I965, p. 65). [Despite earlier suggestions (Harker...clarifications of age relations in the Cuillins (Weedon, i96I, I965; Hutchison, 1966 and pers. comm.), |  | | Journal (volume) | | Vermont Cover: Perspective block diagram of the Québec- Vermont Orogen (from Dóolan, 1989; see Doolan...oceanic domain from Eastern Townships Appalachians, Québec: Taconian versus Acadian tectonics...............Evolution and collage of the Saint-Daniel Mélange in the Dunnage zone of the Québec Appalachians.............ultramafiques du Complexe ophiolitique de Thetford Mines, Québec: modèle magmatique de Ia distribution des platinoIdes...from the hinterland of the Eastern Townships of Québec: the result of continental (A-type) subduction |  | | Report (chapter) | | Bloemendal & deMenocal 1989; deMenocal et al. 1991; Weedon et al. 1999; Shackleton et al. 1999a; Ellwood et...calibration of geological timescales (Mead et al. 1986; Weedon et al. 1997, 1999; Shackleton et al. 1999b; Crick...cycles generally remains and can be extracted (i.e. Weedon et al. 1999). Superimposed on these cyclic variations...commonly pyrite and siderite, are formed and magnetite is lost (Karlin & Levi 1983, 1985; Ellwood et...these datasets (i.e. Bloemendal & deMenocal 1989; Weedon et al. 1999; Jovane et al. 2006; Ellwood et al |  | | Journal (article/letter/editorial) | | with a Bartlett-Window to reduce spectral leakage (Weedon, 2003). Using these techniques in combination allows...experiments and relatively low coercivities imply that magnetite (and/or low Ti content titanomagnetite) is the...Sediment from this region is often depleted in magnetite through postdepositional diagenetic dissolution...susceptibility near 580 °C which indicates the presence of magnetite. Susceptibilities are far higher for the cooling...heating curves indicating that new magnetic phases (magnetite) were created during heating. The thermal demagnetization |  | | Journal (article/letter/editorial) | | John's,Newfoundland AIC 5T7, Canada AND R. I. THORPE GeologicalSurveyof Canada,601 BoothStreet,Ottawa, Ontario...Ontario KIA OES,Canada Abstract The NewfoundlandCentral mobilebelt recordsthe Early Paleozoicbirth,...intersticesand locally contain minor disseminated pyrite, magnetite,and manganeseminerals.Limestoneis alsocommon,...SpringPond Formation.Massivesulfidedeposits:1, Victoria mine; 2, Jacks Pond; 3, Tulks East; 4, Tulks Hill; 5...of canism(Fig. 5). The relatively low-gradeEast mine 459 _ 18 m.y. (Rb/Sr whole rock) and 449 _ 20 depositconsists |  | PIRRIE, D., POWER, M. R., ANDERSEN, J. C. Ø., BUTCHER, A. R. (2000) Platinum-group mineralization in the Tertiary Igneous
Province: new data from Mull and Skye, Scottish Inner Hebrides, UK. Geological Magazine, 137 (6) 651-658 doi:10.1017/s0016756800004520 | Journal (article/letter/editorial) | | ultramafic xenoliths (up to 20 m in diameter) (Fig. 2b; Weedon, 1961). The Peridotite Series is further cut by...chromitite layers are well exposed along Allt Beag (e.g. Weedon, 1965; Bell & Claydon, 1992). Sampling focused...Individual layers can be traced laterally for over 50 m (Weedon, 1965), although they commonly pinch (to under...Eucrite Series, commonly preserving the regional dip (Weedon, 1965). The chromite grains within the chromitites...S. J. 1996. Unusually high concentrations of magnetite at Caraíba and other Cu-sulfide deposits in the |  | | Journal (article/letter/editorial) | | (2001) 159 186 (2001) 199 Finch, A.A., Shaw, P.A., Weedon, G.P. and Holmgren, K., Trace element variation...decreasing plate coupling 186 (2001) 471 Içmren, C., Le Pichon, X., Rangin, C., Demirbaḡ, E., Ecevitoḡlu...hysteresis of pseudo-single-domain and multidomain magnetite below the Verwey transition 186 186 186 186 186...see Duermeijer, C.E. Larsen, L.M., see Jamtveit, B. Le Pichon, X., see Içmren, C. Lee, D.-C., see Snyder...a slab window vs. stalled slab 186 (2001) 175 Weedon, G.P., see Finch, A.A. Winkler, W., see Spikings |  | | Journal (article/letter/editorial) | | estimated in North America (Minguez et al., 2015), Oman (Le Guerroué et al., 2006; Bowring et al., Z. Gong...variations modulate the amplitude of precession cycles (Weedon, 2003), amplitude modulation analysis (Hinnov,...wavelengths (half bandwidth of the spectral peak; Weedon, 2003), two spectra reveal consistent significant...cycle of long-term variations in eccentricity (Weedon, 2003). Spectral peaks at 430 cm, 110 cm and...predicted frequency range for long eccentricity (LE), short eccentricity (E), obliquity (O) and precession |  | | Journal (article/letter/editorial) | | fine-grained granophyre. 264 L.R. WAGER, D. S. WEEDON, AND E. A. VINCENT ON Small p l a t y phenocrysts...deseriptio~ see ol)ioosite. ] 266 L.R. WAGER, D. S. WEEDON~ AND E. A. VINCENT ON by Harker as extending for...largely of quartz and felspar, made dark with small magnetite crystals. Occasionally there are slightly coarser...felspar, the refractive index of which is less than Canada balsam ; the hypersthene crystals are present but...replaced by bastite. 274 L . R . W'AGER, D. S. WEEDON~ AIND E. A. VINCENT ON The higher-temperature |  | Gauthier, M., Corrivaux, L., Trottier, L.J., Cabri, J., Laflamme, J.H.Gilles, Bergeron, M. (1990) Chromitites platinif�res des complexes ophiolitiques de l'Estrie-Beauce, Appalaches du sud du Qu�bec. Mineralium Deposita, 25 (3) doi:10.1007/bf00190378 | Journal (article/letter/editorial) | | cumulat ft leur passage aux pyrox6nites. Le platine, le palladium et le rhodium sont exprim6s soit sous forme...L'iridium, l'osmium et le ruth6nium y pr6dominent g6n6ralement sur le platine et le palladium. Jusqu'~i...une campagne de prospection lithog6ochimique dans le sud du Qu6bec vient d'y identifier des chromitites...chromitites ophiolitiques habituellement st6riles. Dans le pr6sent article, nous exposerons ces caract6ristiques...existe deux g6n6rations d'ophiolite dans le Sud du Qu6bec et dans le Nord de la Nouvelle-Angleterre: la P6nobscottienne |  | | Journal (article/letter/editorial) | | impossible to distinguish them, in thin section, from magnetite. Many contain central inclusions of indeterminate...spinels and, near the margins, some amoeboid magnetite grains. The feldspar laths vary in length from...corresponds with that of the Gars-bheinn peridotite (Weedon 1960) quoted in column D, Table V. The relatively...Analysts: E. A. Vincent and R. Hall. Quoted from Weedon 1960. D. Olivine-rich portion, centre of banded...Analysts: E. A. Vincent and R. Hall. Quoted from Weedon 1960. composition of the normative plagioclase |  | | Journal (article/letter/editorial) | | LAYERED INTRUSION, CENTRAL AUSTRALIA 547 Ollvine magnetite member Uohnson member Fio. 1. The Kalka Intrusion...1939; Emeleus, 1963; Irvine, 1963; Wadsworth, 1963; Weedon, 1965; Naldrett & Mason, 1968; Mukherjee & Haldar...accumulation of economic minerals such as chromite or magnetite in the centres of the bodies. For the current...calculated for Kalka, local transport of chromite and magnetite grains up to about 3 mm in diameter could be accomplished...be lacking. Important stratiform vanadiferous magnetite deposits are known from the Jameson Range Intrusion |  | | Journal (article/letter/editorial) | | Mines ophiolite complex, Northern Appalachians, Canada Luc Harnois 1, Jacques Trottier z, and Maurice...Montr6al, PO Box 8888, Station A, Montr+al, (Qu6bec) Canada H3C 3P8 2 Groupc Minier Morisco, 800 West, Boulevard...Boulevard Ren6-L6vesque (Room 450), Montr6al, (Qu6bec) Canada H3B lX9 Received December 11, 1989 / Accepted May...calc-alkaline metavolcanic rocks of the Ascot and Weedon Formations. The allochtonous marie and ultramafie...Group Lower to Middle Ordovician Formations of Weedon and Ascot Ophiolites Cambro-Ordovician inner zone |  | | Journal (article/letter/editorial) | | succession isintrudedbyup The skarns in the Nevoria mine area are subdivided ac- to 450-m-thick, layered...anomalies couldbecorrelated with cummingtonite magnetite. The magnetite-bearing unitsintersected byotherdrillholes...highmagnegeologic mapof level3, Mainshaft,is basedon the mine amphibole-chlorite levelplan,onpetrographic samples...lightandoccurs in 50-to 200-tzmthickbands morphic magnetite grains contains ilmeniteexsolution lamel- underreflected...Metamorphic grun-qz-magnetite BIF 3 43.66 0.04 0.71 WeldBange silicate BIF Canada Algmna-type silicateBIF |  | | Journal (article/letter/editorial) | | deposits:Cassiar mine, British Columbia; Thetford mines, Quebec; and Woodsreef mine, New South Wales...Wales. The Cassiar mine will be discussed in detail because the model was constructed based on observations...s representedby blackline. (b). Cassiarasbestos mine, BritishColumbia(basedon Gabrielse,1985). C.F. =...south-dipping schistosity(location a, Fig. 2). Magnetite-free asbestosveinswere dragfolded at the fault...stereonets.In thin section,the magnetite-free veins alwayscrosscutthe magnetite-bearing veins (Fig. 3d). The |  | | Journal (article/letter/editorial) | | (-olivine) (-magnetite) (-apatite) orthocumulates plagioclase-olivine-pyroxene (-magnetite) orthocumulatesJ...the researches of Carr (1952), Zinovieff (1958), Weedon (1960; 1961; 1965) and Hutchison (1964; 1966; 1968)...complex is the Gars-bheinn layered ultrabasic sill (Weedon, 1960). Minor intrusions include at least five...Labrador Sea. Can. JI Earth Sci., 6, 1320-1. 271 WEEDON, D. S. 1960. The Gars-bheinn sill, Isle of Skye...Skye. Q. JI geol. Soc. Land., 116, 37-54. WEEDON, D. S. 1961. Basic igneous rocks of the Southern Cuillin |  | Wu, Huaichun, Zhang, Shihong, Feng, Qinglai, Jiang, Ganqing, Li, Haiyan, Yang, Tianshui (2012) Milankovitch and sub-Milankovitch cycles of the early Triassic Daye Formation, South China and their geochronological and paleoclimatic implications. Gondwana Research, 22 (2) 748-759 doi:10.1016/j.gr.2011.12.003 | Journal (article/letter/editorial) | | changes in the input of fine-grained detrital magnetite, which in turn may have been driven by astronomically...coercivity magnetite and high coercivity hematite, only fine-grained, low coercivity magnetite could affect...fluctuations in the input of fine-grained detrital magnetite. Fig. 2. Lithostratigraphy, chronostratigraphy...amplitude modulation (AM) analysis (Hinnov, 2000; Weedon, 2003). In order to explore the AM relationship...Formation is most likely fine-grained, low-coercivity magnetite (Fig. 3). Therefore, the ARM variations may reflect |  | | Book (chapter) | | Palaeocene crust. ROINEVAL olivine and titaniferous magnetite overlying an essentially aphyric mugearite. The...together with lesser amounts of altered olivine and magnetite. Boyd (1974) reports homogeneous (An55 ) cores...spinel microphenocrysts mantled by titaniferous magnetite are also present, these and the orthopyroxene...Skye Sheet 80 and parts of 81, 90 and 91 ). 6% magnetite is present. Upwards, the proportion of plagioclase...Skarn zones Group 2 Boron-fluorine ore skarns Magnetite * Tremolite Forsterite* Diopside* Monticellite |
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