 | | Journal (article/letter/editorial) | | – ANTHOPHYLLITE – CUMMINGTONITE ROCKS FROM THE LAR DEPOSIT, LAURIE LAKE, MANITOBA SALLY R. ELLIOTT-MEADOWS...Saskatchewan S7N 4G8 EDGAR FROESE§ Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario K1A 0E8 EDWARD...alteration zone of the Lar Cu–Zn deposit in the Lynn Lake volcanic belt, in Manitoba; in some altered rocks...rocks, cummingtonite is present as well. Under appropriate pressure–temperature conditions (approximately...composition of cordierite, anthophyllite and cummingtonite, in the presence of quartz, results in the degenerate |  | | Journal (article/letter/editorial) | | AlterationGeochemistryand Petrologyof the Lar Cu-Zn Deposit, Lynn Lake Area, Manitoba, Canada SALLY R. ELLIOTT-MEADOWS*...Waterloo,Waterloo,Ontario,CanadaN2L 3G1 Abstract The Lar depositis a stratiformCu-Zn volcanogenic massive...ockslocatedabout 60 km southwest of LynnLake,Manitoba,withinthe southernarmof the LynnLakegreenstone...Introduction THE Lar property is locatedabout60 km southwest of Lynn Lake, Manitoba,just northof the...the northwest arm of Laurie Lake, about 15 km west of the former zoneandis the metamorphicequivalentof |  | | Journal (article/letter/editorial) | | 57-68 Metamorphic evolution of anthophyllite/cummingtonite-cordierite rocks from the upper unit of the...lowpressure amphibolitic gneisses formed mainly of cummingtonite, cordierite, andalusite and garnet. The first...Ordenes Complex, in which the anthophyllite-cummingtonite rocks are located, appears to have been facilitated...Key-words: metamorphic evolution, anthophyllite, cummingtonite, cordierite, low-Ca amphibolites, Ordenes Complex...association with massive sulphide deposits. This kind of deposit very commonly shows a strong chloritic alteration |  | | Journal (article/letter/editorial) | | long-range order of Fe2+ and Mg on the M-sites of cummingtonite-grunerite and anthophyllite may be considered...order-disorder. End-member thermodynamic properties of cummingtonite and ferroanthophyllite are derived from those...XFe ≤ 0.1. LnKD for Fe-Mg exchange between cummingtonite and anthophyllite passes through zero at XFe...marginally stable with respect to end-member cummingtonite, and the addition of Ca renders the breakdown...monoclinic cummingtonite-grunerite (predominantly C2/m, but P21/ m in low-temperature cummingtonite) and orthorhombic |  | | Journal (article/letter/editorial) | | cordierite; chl, chlorite; ctd, chloritoid; cu, cummingtonite; di, diopside; ep, epidote; g, garnet; ged,... staurolite, talc, anthophyllite, gedrite, cummingtonite, orthopyroxene, the aluminosilicates and quartz...due for revision (Holland & Powell, 2006). Cummingtonite forms an invariant assemblage with orthoamphibole...and 665 °C (labelled as Ô[i8]Õ on Fig. 1). Cummingtonite–cordierite parageneses in this system are restricted...mineral assemblage evolution in these rocks. Cummingtonite-bearing equilibria are restricted to high-temperature |  | | Journal (article/letter/editorial) | | (Volkert, 2004). A-type granites of the Byram and Lake Hopatcong Intrusive Suites were emplaced at ca....Activation M Laboratories (ACTLABS) in Ontario, Canada. Samples were pulverized to 95% -200 ED mesh...cordieritegedrite gneisses from the Archean massive sulfide deposit at Manitouwadge, Ontario have low 18O (WR) = 3...suggest the sequence represents a meta-evaporite deposit (Volkert, 2004). Meta-evaporitic rocks worldwide...resembles their parental sources in the Byram and Lake Hopatcong Intrusive Suites (Volkert et al., 2005) |  | | Report (volume) | | be communicated. Frank C. Hawthorne, Winnipeg, Canada Roberta Oberti, Pavia, Italy Giancarlo Della Ventura...Geological Sciences University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada frank_hawthorne@umanitoba.ca...40 5.26–5.37 101.8–105.7 846–948 P21/m cummingtonite 9.48–9.51 17.99–18.13 5.28–5.31 102.0–102...(and root composition ˚ Mg2 Mg5 Si8 O22(OH)2, cummingtonite). However, recent work has shown that synthetic...2.000 1.917 1.000 1.583 2.250 2.250 2.000 Cummingtonite: r.m.s. deviations are 3.2% and 9.6%, respectively |  | | Journal (article/letter/editorial) | | Cordierite anthophyllite -cummingtonite rocks from the Lar Deposit; Laurie Lake, Manitoba. Can Min 38:545–550...contact metamorphism in the aureole of the Makhavinekh Lake Pluton, Nain Plutonic Suite, Labrador. J Metamorph |  | | Journal (article/letter/editorial) | | Cordierite–anthophyllite–cummingtonite rocks from the Lar Deposit; Laurie Lake, Manitoba. Canadian Mineralogist |  | | Book (edition) | | Amphibole group 137 171 Anthophyllite–Gedrite, Cummingtonite– Grunerite, Tremolite–Ferro-actinolite, Hornblendes...Science and Technology Mineralogical Association of Canada for figures from The Canadian Mineralogist The Mineralogical...metasomatized limestone, Blue Bell Mine, British Columbia, Canada (Mossman, D.J. & Pawson, D.J., 1976, Can. Min....metamorphism of the Biwabik IronFormation, East Mesabi district, Minnesota. Memoir of the Geological Society of...Dark red-brown zircon, North Burgess, Ontario, Canada (Palache, C. & Ellsworth, H.V., 1928, Amer. Min |  | | Book (edition) | | The vein association and some other hydrothermal deposit types, 21 3 17 Strata-bound deposits, 233 Part...nature and morphology of the principal types of ore deposit, 26 3 Textures and structures of ore and gangue...2: Examples of the more important types of ore deposit 6 Classification of ore deposits, 99 7 Diamond...difficulty explorationists now have in finding a viable deposit in an increasingly unfavourable economic climate...tonnage ofore required to provide an economic deposit. The general tendency in metalliferous mining during |
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