The Aley Nb deposit in northern British Columbia, Canada, is hosted by metamorphosed calcite and dolomite carbonatites of anorogenic affinity emplaced Lower Paleozoic sedimentary carbonate rocks the Devonian. Primary mineralization consists pyrochlore (commonly comprising a U–Ta-rich F-poor core) ferrocolumbite developed as discrete crystals replacement products after pyrochlore. These phases associated heavy minerals (apatite ± magnetite zircon baddeleyite) precipitated early magmatic...

In the family Salmonidae, lake trout ( Salvelinus namaycush ) are considered least tolerant of salt water. There are, however, sporadic reports in coastal, brackish habitats Canadian Arctic. Otolith microchemistry analyses conducted on and Arctic char alpinus from four lakes West Kitikmeot region Nunavut, Canada, revealed that 37 135 (27%) made annual marine migrations. Anadromous were significantly better condition (K = 1.17) had higher C:N ratios (3.71) than resident 1.05 3.34). also δ 15...

Abstract X‐ray composition maps and quantitative analyses for Mn, Ca Cr have been made six pelitic calc‐pelitic garnet crystals Al, Fe two kyanite crystals, from lower mid/upper amphibolite facies rocks the Grenville Province of western Labrador, using an electron microprobe analyser a laser ablation ICP‐MS. Garnet with spiral (‘snowball’) internal fabrics (S i ) has zoning in major elements, implying that growth was concentrated discrete regions crystal at any one time (spiral zoning). is...

We examined the mode of occurrence, pattern zoning and composition magnetite associated spinel-group minerals in three types calciocarbonatite from Kerimasi volcano, Tanzania. In all samples, is one earliest phases to have crystallized, shows an appreciable compositional variation. The majority compositions correspond with low moderate proportions magnesioferrite ulvospinel components (10–28 2–28 mol.%, respectively) 2 O 4 ). two trace elements consistently present amounts are V (400–2000...

Toxicological studies are often hampered by concerns of fish residency in the industrial effluent being evaluated. Contaminants muscle or visceral tissue useful indicators recent exposure, but depuration, metabolic transformation, and recompartmentalization contaminants makes their use as temporal markers tenuous. Otoliths metabolically stable can provide resolution for exposure to some elements that incorporated into calcified structure, including divalent cations Sr, Zn, Mn. Here we first...

Research Article| August 01, 2009 Constraints from diffusion profiles on the duration of high-strain deformation in thickened crust A. Camacho; Camacho 1Department Geological Sciences, University Manitoba, Winnipeg, Manitoba R3T 2N2, Canada Search for other works by this author on: GSW Google Scholar P. Yang; Yang Frederiksen Author and Article Information Publisher: Society America Received: 25 Dec 2008 Revision 01 Apr Accepted: 02 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print...

The Seabee Gold Operation, located in northern Saskatchewan, Canada, hosts the Santoy and gold deposits, as well Fisher property; latter is an important exploration target. This mineralization hosted rocks of Pine Lake greenstone belt that within Glennie domain larger Paleoproterozoic Trans-Hudson orogen. Mineralization focused shear zones, including system extends south onto property. role ore-adjacent intrusions, systematics mineralization, relationship between properties are largely...

Abstract This work is the first in situ U–Pb geochronological study of perovskite and calcic garnet (andradite) from Guli complex Maimecha–Kotuy alkaline province (Polar Siberia, Russia). The isotopic compositions contact zones two carbonatite stocks (Southern Northern) jacupirangite separating were determined by laser-ablation inductively-coupled-plasma mass-spectrometry (LA-ICPMS) isotope-dilution thermal-ionisation (ID-TIMS). LA-ICPMS ID-TIMS data for Northern stock are good agreement,...

Nous avons etudie l'evolution des assemblages de mineraux, leurs compositions et proportions en fonction la pression, temperature composition globale granulites coronitiques granoblastiques pression elevee, derivees aux depens d'une suite anorthositique labradorienne dans le socle Lelukuau, secteur nord-est Province du Grenville, au Quebec. L'evolution texturale echantillons a surtout ete regie par les gradients entre domaines d'olivine plagioclase, implique une pseudomorphose l'olivine...

Determination of trace element concentrations in continuously growing biological structures such as otoliths, whiskers, and teeth can provide important insight into physiological ontogenetic processes. We examined 11 elements (Li, Mg, Mn, Cu, Zn, Se, Rb, Sr, Cs, Ba, Pb) the annual dentine growth layer groups (GLGs) 66 Eastern Canadian Arctic belugas (Delphinapterus leucas). Several these displayed clear consistent patterns early life, though few longer term trends or signals were present...

Zircon macrocrysts in (sub)volcanic silica-undersaturated rocks are an important source of information about mantle processes and their relative timing with respect to magmatism. The present work describes variations trace element (Sc, Ti, Y, Nb, lanthanides, Hf, Ta, Pb, Th, U) isotopic (U-Pb) composition zircon from the Drybones Bay kimberlite, Northwest Territories, Canada. These data were acquired at a spatial resolution ≤100 µm correlated internal characteristics (imaged using...