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| | Journal (article/letter/editorial) | | calc-alkaline to tholeiitic affinity, and with U–Pb in zircon ages from 2.84 to 2.74 Ga
(Gouvêa, 2017). Dikes...are also identified (Juliani and Fernandes, 2010; Lagler, 2011). The
volcaniclastic facies occur in the...intrusive lithotypes (Juliani and Fernandes, 2010; Lagler, 2011).
The rhyolitic and rhyodacitic lava flow...were all recalculated to assumed 1.88 Ga Pb–Pb in zircon geochronology,
because to their overlapping crystallization...basaltic
andesite and andesite; and late-stage zircon + magnetite + plagioclase as recorded in the
rhyodacitic | 👁 Image
| Roverato, M., Giordano, D., Giovanardi, T., Juliani, C., Polo, L. (2019) The 2.0–1.88 Ga Paleoproterozoic evolution of the southern Amazonian Craton (Brazil): An interpretation inferred by lithofaciological, geochemical and geochronological data. Gondwana Research, 70. 1-24 doi:10.1016/j.gr.2018.12.005 | Journal (article/letter/editorial) | | prehnite-pumpellyite field (Echeverri-Misas, 2010; Lagler et al., 2011;
MA
Fernandes et al., 2011).
ED...suite yielded an age of 1857 ± 8.4
Ma (Shrimp U/Pb zircon analyses; Roverato, 2016). Other available geochronological...(TIMS Pb–Pb in zircon) for the Sobreiro Formation and
ca. 1879 ±2 Ma (TIMS Pb–Pb in zircon) for the Santa...plagioclase, quartz, Fe–Ti oxides and accessory-amount of zircon and apatite.
Plagioclase and bipiramidal quartz...reference standards BHVO-2 and BR, was 0.5–2%.
Zircon grains were examined with a FEI-QUANTA 250 scanning | 👁 Image
| Juliani, Caetano, Rodrigues de Assis, Rafael, Virgínia Soares Monteiro, Lena, Marcello Dias Fernandes, Carlos, Eduardo Zimmermann da Silva Martins, José, Ricardo Costa e Costa, Jhoseph (2021) Gold in Paleoproterozoic (2.1 to 1.77 Ga) Continental Magmatic Arcs at the Tapajós and Juruena Mineral Provinces (Amazonian Craton, Brazil): A New Frontier for the Exploration of Epithermal–Porphyry and Related Deposits. Minerals, 11 (7) 714 doi:10.3390/min11070714 | Journal (article/letter/editorial) | | limit of the province [36,54,64,65]. Inherited
zircon grains in the TMP granites with U–Pb ages of 2480...monzogranite to
tonalite [11]. The SHRIMP U–Pb zircon crystallization ages of the tonalite gneiss range...granitic to gneiss exhibit a Pb-evaporation single
zircon age at 2816 ± 4 Ma. Moreover, the ca. 2.0 Ga arc-derived...(1967 ± 6.6 Ma
to 1975 ± 5.3 Ma; SHRIMP IIe U–Pb in zircon; [26]; Figure 4F) and reddish flow-banded
rhyolite...lithophysae (1.966 ± 22 Ma, SHRIMP IIe U–Pb in zircon; [26]). A magnetic pyroclastic facies (1990 ± 21 | 👁 Image
| Antonio, Paul Y.J., D'Agrella-Filho, Manoel S., Trindade, Ricardo I.F., Nédélec, Anne, de Oliveira, Davis C., da Silva, Fernando F., Roverato, Matteo, Lana, Cristiano (2017) Turmoil before the boring billion: Paleomagnetism of the 1880–1860 Ma Uatumã event in the Amazonian craton. Gondwana Research, 49. 106-129 doi:10.1016/j.gr.2017.05.006 | Journal (article/letter/editorial) | | , 2016; Pisarevsky et al., 2014). The detrital zircon database,
however, favors the first hypothesis...obtained on a dacite by Pb-Pb
RI
evaporation on zircon (Pinho et al., 2006).
SC
The Santa Rosa Formation...granitic intrusions. Two Pb-Pb evaporation ages on zircon of 1884 ±
D
1.7 Ma and 1879 ± 2 Ma, respectively...granophyric textures are present. Primary accessories are zircon, fluorite, titanite, Fe-Ti
oxides, and apatite...1866 ± 3 Ma, respectively, by Pb-Pb evaporation on zircon (Teixeira et al., 2002).
PT
The geodynamic context | 👁 Image
| Barreto, Carla Joana Santos, Lafon, Jean Michel, da Rosa Costa, Lúcia Travassos, Lima, Evandro Fernandes (2014) Palaeoproterozoic (~1.89 Ga) felsic volcanism of the Iricoumé Group, Guyana Shield, South America: geochemical and Sm-Nd isotopic constraints on sources and tectonic environment. International Geology Review, 56 (11) 1332-1356 doi:10.1080/00206814.2014.930800 | Journal (article/letter/editorial) | | volcanic rocks in this region has yielded Pb-Pb zircon
ages of 1.89 Ga (Barreto et al. 2013), thus reinforcing...Figueiredo
regions furnished Pb-Pb and U-Pb SHRIMP zircon ages
of 1.89–1.88 Ga (Costi et al. 2000; Santos...al. 2006; Valério et al. 2009). A similar Pb-Pb
zircon age of 1.89 Ga was obtained for Iricoumé volcanics...and Santa
Rosa formations also furnished Pb-Pb zircon ages of
1.88 Ga (Pinho et al. 2006; Fernandes et...2002). However, some volcanic
rocks have Pb-Pb zircon ages of approximately 2.0 Ga,
indicating the existence | 👁 Image
| | Journal (article/letter/editorial) | | reflected light microscopes (Brasilia,
Federal District, Brazil) at the Federal University of Pará (UFPA)...(UFPA) and the University of Brasília (UnB)
Federal
District,
Brazil) at2 petrographic
the Federal microscope...along the regional shear trend of NW–SE [32]. U-Pb zircon aged 1957 ± 6 Ma, obtained for a
granite attributed...a monzogranite
of 1982 ±structures
8 Ma (Pb–Pb
zircon)
Cuiú
Complex [35,36].deposit
This event
was responsible...biotite (3–5%) [40]. The accessory minerals are zircon, titanite, pyrite and
magnetite, which compose | 👁 Image
| Klein, Evandro L., Rodrigues, Joseneusa B., Queiroz, Joana D.S., Oliveira, Roberto G., Guimarães, Stella B., Chaves, Cesar L. (2017) Deposition and tectonic setting of the Palaeoproterozoic Castelo dos Sonhos metasedimentary formation, Tapajós Gold Province, Amazonian Craton, Brazil: age and isotopic constraints. International Geology Review, 59 (7) 864-883 doi:10.1080/00206814.2016.1237311 | Journal (article/letter/editorial) | | andesites
and granitoids (2011–1918 Ma). U–Pb LA-ICP-MS zircon data indicate maximum depositional ages
of 2050...(2030–1956 Ma). The quartz-arenite composition, zircon U–Pb data, and negative εHf
(−1.3 to −13.0) and...Based on U–Pb SHRIMP
results on a few detrital zircon (13 crystals), the maximum depositional age of...of the CSF was estimated to be
2083 ± 5 Ma, and zircon crystals with older
Palaeoproterozoic and Archaean...of this andesite was determined at 2011 ± 6 Ma
(zircon, U–Pb SHRIMP; Queiroz et al. 2015), which establishes | 👁 Image
| | Journal (article/letter/editorial) | | proportion of basalts with “arc -like” signature and zircon age peaks, the
latter suggesting an increase in...Paulo, Brazil
Journal Pre-proof
(GeoLab). For zircon separation, samples were initially crushed, then...with
heavy liquids (bromoform, d =2.89 g/cm³). The zircon grains were handpicked and mounted on doublesided...sample and a reference value (Temora 2) every 4 zircon grains. The
204
Pb
e-
correction followed the...(Fig. 2c) and aplite dykes. Titanite, allanite and zircon were recognized as
oo
f
accessory phases. Plagioclase | 👁 Image
| Lacasse, Christian Michel, Ganade, Carlos Eduardo, Mathieu, Lucie, Teixeira, Noevaldo Araújo, Lopes, Leonardo Brenguere Leão, Monteiro, Cimara Francisca (2020) Restoring original composition of hydrothermally altered Archean metavolcanic rocks of the Carajás Mineral Province (Brazil): Geodynamic implications for the transition from lid to mobile tectonics. Lithos, 372. 105647pp. doi:10.1016/j.lithos.2020.105647 | Journal (article/letter/editorial) | | and younger K-rich intrusions, all yielding U-Pb zircon ages between 3.0-2.83 Ga (Hirata
Pr
et al., 1982;...2015; Mansur Ferreira Filho, 2016), based on U/Pb zircon
pr
The Águas Claras Formation dated between...consists of Mesoarchean granitoids yielding U-Pb zircon ages between
3.0-2.8 Ga, mainly represented by...represented by Neoarchean high-K granitoids
yielding U-Pb zircon ages between 2.7-2.5 Ga (Figs. 1 and 2). Their...geochemistry of CMP metavolcanic rocks with U-Pb zircon ages between
2.78-2.70 Ga is also compiled into | 👁 Image
| | Journal (issue) | | Texas, Fontana, Calif., Hamilton, Ont., Canada District Sales Offices: New York, Boston, Philadelphia...OFFICES: Dwight Bidg., Kansas City 5, Missouri DISTRICT SALES OFFICES: 500 Fifth Avenue, New York City;... Whereas normal zircon contains about 2% Hf (metal basis), a large source of zircon containing up to...to 7% Hf has been found in Nigeria. This zircon is a by-product of a niobium ore operation by Kennecott...the development of a process for utilizing this zircon. At present, the only large-scale use CW welcomes | 👁 Image
| | Journal (issue) | | the Supreme Court—an expected denial by federal district court of a procedural motion. Too, he may attempt...selected distributors or any of the 28 “U.S.” District Sales Offices or write us at Rockefeller Center... a country apparently has West Germany and Austria form a trade-political unit. We therefore ask ourselves...chemical trade, namely the country “WestGermany and Austria.” It is not yet known to us here in Germany that... the economic-political merger of Germany and Austria. ALFONS METZNER Editor-in-Chief SUSPENDS Chemische | 👁 Image
| | Journal (issue) | | high tension separation
years
Australia
use
Zircon
table
Rutile, Ltd.,
several plants. The ingenious...available for showing upon request through any
the district offices listed below.
THE
Albuquerque
Kansas...heat-treat for the proper
Grant County Public Utility District.
will
concrete and earthen
structure 8412
long...geologic mapping and
technical appraisal
Congonhas district, Minas Gerais, and discovery
20-billion tons
hematite...camera
window
attachment
(far right) and,
(Austria),
Hunger
Kiel, and Winifred
Petri
Munich
McGraw-Hill | 👁 Image
| | Journal (issue) | | ” specialist. Get in touch with any of our 27 District Sales Offices, or write United States Rubber Company...tion control district have chosen an administrative control officer of the mew district. He’s Benjamin...must be approved by the air pollution control district—and even then approval through move brings it...control procedures differs means nothing if the district subse- quently finds the plant discharging pollutants...with the district. Moreover, pollution control into workaday prac- where the Los Angeles district assesses | 👁 Image
| | Journal (issue) | | St. Louis 1, Mo. 6-6232. .-.or any of these District Offices: Atlanta 5, Ga., 1401 Peachtree Station... Business appealing a decision in Chicago by District Judge Waiter LaBuy dismissing the government’s...be looking at the feasibility of setting up a district allocation system whereby companies would be alloted...AAT ION MONTREAL AS CHEMICAL CENTER: In old district near Lachine Canal, industry is served by sea-going...the svc PRODUCTION a Oi Fc Pollution Control District is speedily mobilizing “a 463 local industries | 👁 Image
| | Journal (issue) | | two moves, one of which awaits return of Federal District Judge Bolitha Laws from his vacation: e A motion...Wilson with the circuit court of appeals for the District of Columbia for additional time in which to produce...subsidiary—Metal Recoveries Proprietary Ltd.—mines rutile and zircon in Australia. Main laboratory (near new general...ore in International Titanium Corp., which and district manager). (His first job in industry after U.S...for defense production). The Australian ore’s zircon content—formerly little more than waste—is now | 👁 Image
| | Report (issue) | | Petrographische Mitteilungen, Bd. 33, 34,
35, H. 1-2. Wien, Austria.
Tufts College Studies, vol. 5, nos. 2, 3 (Scientific...Anderson, John Carter.
36. Ore deposits of the Pioche district, Nevada: Eng. and Min. Jour., vol. 113,
no. 7...17, no. 3,
pp. 219-221, 1 fig., May, 1922.
43. Zircon as criterion of igneous or sedimentary metamorphics:...JanuaryFebruary, 1921.
60. General geology of Catorce mining district [San Luis Potosi, Mexico];
Am. Inst. Min. and...Clark, R. W.). Notes on geology of the Okmulgee district [Oklahonia]: Am. Assoc. Petroleum Geologists, | 👁 Image
| | Journal (issue) | | shareholders. S. for shares to March °55 U. S. District Court rules Schering must license pre-1952 patents...agreement with UO: Jan. 56 Appeals Court upholds District Court judgment. SCHERING’S BROWN: In cases, wedded...Property. Since that time, judges in the Federal District Court at Newark, N.J., and in the Third Circuit...taking over U. S. Vanadium assets and functions. S. District Court at Denver granted Carbide’s motion for dismissal...in Delaware and West Virginia) ; but told the district court to reinstate the charges against Electro | 👁 Image
| | Book | | ,
Mountain 1943; Moore 1965) have precise U-Pb zircon ages of 182.5 ± 0.3 and
182.6 ± 0.3 Ma (Svensen...Northern Ireland (1971) Geology of Belfast and district (special engineering
and geology sheet, solid...Paraná
basin, Brazil: a precise U-Pb baddeleyite/zircon age for a Chapecó-type dacite. Earth Planet Sci...Krishnamacharlu T (1972) Dykes around Dadiapada, Broach District, Gujarat. Bull Volc
35:947–956
Krishnamurthy P...the western portions of Rajpipla Hills,
Broach District, Gujarat, India. Bull Volc 35:930–946
Krogh TE | 👁 Image
| | Journal (issue) | | bs new plant will be located in mane Clearing district, adja- acquired Chemicalaly D* River an ‘...practice, however, limitations on crude imported into District V (West Coast) hit directly at Canadian suppliers...revised program tightens restrictions in all but District V. Added Strain: Continuation of the oil import...many other metallic oxide minerals from apatite to zircon. Write today for information, samples and prices...a aL. Chasis Ave., OXford 5-5959 53 76 Jt.. Lagler, 95 ee 1740 856 Los New Patten, 5-2981 | 👁 Image
| | Journal (issue) | | nearest district office . . . you will-receive a prompt response. POLYCHEMICALS DEPT. DISTRICT OFFICES...been patented by another com- pany, a federal district court in Ohio has awarded damages of $100,000...Judge Joseph Lieb of the U.S. district court for the Southern District of Florida, Miami Division, has...CENTER - PITTSBURGH 22- PENNSYLVANIA Chemical DISTRICT OFFICES: Cincinnati ¢ Charlotte * Chicago Cleveland...would be required Step by Step: In the first step, zircon reactor having a cooled lid. Iodine (or chlorine) | 👁 Image
| | Journal (issue) | | the Colorado Plateau
and Canada’s Blind River District
recently delivered Mancha 3-ton storage battery...periods
performance.
the isolated Red Canyon District, Utah, Radium King Mines
Inc. relies
Caterpillar...principal gains
were made
France, West Germany,
Austria and Italy.
The most significant development
the...noted that Thailand
had ratified the Agreement. Austria
was also welcomed
participating
member later
the...source
production
production from the
fluorspar district. Domestic
1957 were, American
Illinois, Fairmont | 👁 Image
| | Journal (issue) | | LOUISVILLE 1, KENTUCKY GAS PROCESSES DIVISION + DISTRICT OFFICES: New York, San Francisco January 19...has filed suit in federal court for the Southern District of New York against Kingston Brush Manufacturing...your own destiny, initiating Filter Aids Zircon Sand Zircon Flour Sodium Chlorite research and carrying...the degreasing solvents used in the 12th Naval District today accounts for about 4% of Hird’s business...West Sixth St., Inc. ................ Adv. Lagler, H. .. London : Assoc. ...... & Geller, | 👁 Image
| | Journal (issue) | | Jerome S. Spevack is now entering its. ’. The. district court refused a perfinal and most critical round...ee Palmolive - Spevack filed suit in federal district court -(Washington) ~in-April | ae seeking an... - -Columbia-Southern has now standardized on zircon- ‘jum stems, flanged packing glands, and hold-down... -15, Landgraf-Wilhelm, Germany London... H.‘Lagler, McGraw-Hill House, 95 Farrington St., E.C. 4 | 👁 Image
| | Journal (issue) | | conspiring to control trade in rubber belting. Federal District Judge Jean Rubber, Dayton Rubber, and Goodyear...Belle—which is not organized and hasn’t been since District 50 of the United Mine Workers lost its hold there...INTERNATIONAL MINERALS 20 N. Wocker Dr., Chicago 6 * DISTRICT SALES OFFICES: 485 Lexington Ave., New York 17...CHEMICAL CORPORATION 20 N. Wacker Dr., Chicago 6 * DISTRICT SALES OFFICES: 485 Lexington Ave., New York 17...ee. “Tihtaniumeand zirconium alloys, titanates, zircon, tirconiveny oxide,.other zirconium products Vanadium | 👁 Image
| | Journal (issue) | | against The curtain fell last sdle on Act U. S. district court at Salt Lake City. For Act Two, the scene...Co. winning a clear-cut victory in the federal district. court at Pocatello, Ida., with trial ee to. start...lacked the funds and the -assessment to Colorado district . the first year after purchase of mamanpower...26), resulted from. suits brought in ’55 in U.S. district ee Beas * | court (Knoxville) by 164 farmers...to produce ce the ‘ates in 28 states. in the District of: Columbi a.and ‘in Cuba. and has. 365 parking |
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