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Yellowknife 2007 for a Change of Climate Pour Un Changement Climatique Yellowknife 2007 For a change of Climate Pour un changement climatique GAC-MAC Annual Meeting Congrès annuel de l’AGC-AMC Abstracts - Résumés Volume 32 May 23-25 mai Mineralogical Association Geological Association of of Canada Canada Association Minéralogique Association Géologique du Canada du Canada TABLE OF CONTENTS TABLEAU DES MATIÈRES ABSTRACTS / RÉSUMÉS ………………………………………………2 AUTHOR INDEX / INDEX DES AUTEURS …………………………91 Abstract Volume 32 ISBN: 978-1-897095-25-6 Program with Abstracts Volume 32 ISSN: 0701-8738 Printed in Canada GAC – MAC AGC – AMC Publisher: Geological Association of Canada ©2007 BIOSTRATIGRAPHY, BIOFACIES AND Porosity determination for outcrop samples ranged from 1.6 to PALEOENVIRONMENT OF THE UPPER CRETACEOUS 18.6%. Thin section analysis shows both intergranular and DEPOSITS IN THE NORTHERN FLANKS OF CENTRAL intragranular porosity, the latter observed most frequently in ALBORZ MOUNTAINS, JORBAND SECTION, NORTH OF tripolitic chert. In many samples, porosity is occluded by clay IRAN minerals and quartz overgrowths. Permeability for outcrop Abdolalipour, S. and Darvishzade, B., Geology Department, samples ranged from 0 to 13.7 mD. Based on surface samples, University of Tehran, Enghelab Avenue, the best prospects for reservoir rock are medium-grained [email protected] sandstones. In order to study the biostratigraphy and paleoenvironment of the Upper Cretaceous deposits in the Northern flanks of Central MINERAL CHEMISTRY OF CHLORITE IN ALTERED Alborz Mountains, Jorband section located in the South Noor, VOLCANIC ROCKS OF TOTMAJ AREA, SE OF KASHAN, selected. 91 samples collected and studied by washing method IRAN and thin sections. The study of above deposits led to Aminoroaya yamini, M., Kananian, A. and Ahmadian, J., recognition at least 35 species of planktonic foraminifera and 5 Department geology, University of Tehran, Iran, biozones that correspond with universally standard biozones in [email protected] Mediterranean regions and Tethian domain : biozones 1) Globotruncanita elevata interval zone, 2) Globotruncana The Oligocene Totmaj volcano-sedimentary sequence which is ventricosa interval zone and 3) Globotruncanita calcarata total located southeast of city is composed of lava flows (basalt, range zone, represent the early, middle and late Campanian, basaltic-andesite and andesite), pyroclastics (various types of respectively and biozones 4) Globotruncana aegyptiaca interval tuffs and agglomerate) and sedimentary rocks (limestones and zone and 5) Gansserina gansseri interval zone suggest the early sandstones). Field and petrographical evidence indicate that and late Maastrichtian, respectively. In this section 2 biofacies some secondary minerals such as epidote, chlorite, calcite of open marine facies belt recognized, consist of biomicrite hematite and sericite are formed in the volcanic rocks due to wackestone and biomicrite packstone, that represent deep water hydrothermal alteration. Geothermometrical studies on chlorite with low energy environment. Also, ratio of the morphotype minerals show that they have been formed at a temperature groups of planktonic foraminifera, including shallow, about 270 ± 30EC. Furthermore, the ranges of temperature intermediate and deeper water fauna, shows that deposition stability of coexisting secondary minerals in the volcanic rocks during Campanian-Maastrichtian in Jorband section, was coincide with the calculated alteration temperature. generally in open marine. GEOCHEMISTRY AND TECTONIC SETTING OF BASALTIC FIELD INVESTIGATIONS FROM THE NORTHERN WESTERN LAVA IN TOTMAJ AREA, SE OF KASHAN, IRAN CANADIAN SEDIMENTARY BASIN: HYDROCARBON Aminoroaya yamini, M., Kananian, A. and Ahmadian, J., POTENTIAL OF THE UPPER DEVONIAN TO LOWER Department geology, University of Tehran, Iran, CARBONIFEROUS TUTTLE FORMATION, YUKON [email protected] TERRITORY Allen, T.L. and Fraser, T.A., Yukon Geological Survey, The volcanosedimentary rocks of the Totmaj area, located at the Whitehorse, YT, [email protected] SE of Kashan, belong to west part of central Iran zone. These rocks consist of interbedded lava flows (mainly basalt, basaltic- The Upper Devonian to Lower Carboniferous Tuttle Formation andesite and andesite), pyroclastics (various types of tuffs and was an exploration target for oil and gas in the Eagle Plain and agglomerate) and Oligocene sedimentary (limestones and Peel Plateau regions of the Yukon and Northwest Territories in sandstones) rocks. The Totmaj basalts show a selective the 1960s and 1970s. To date, seven minor gas shows have enrichment of low ionic potential elements (eg., Rb, Sr, Ba) and been identified in the Tuttle Formation in the Peel region, which are depleted in high ionic potential elements (eg., Nb, P, Y, Cr) lies at the northwestern extent of the Western Canadian compared to chondrite. Trace and rare earth elements Sedimentary Basin. This study is part of a four-year project to geochemical data demonstrate that the Totmaj basalts are Calc- investigate the sedimentology, stratigraphy and hydrocarbon alkaline and are similar to subduction zone basalts. According potential of Upper Paleozoic strata in the Peel region. to the tectonic discrimination diagrams, these volcanic rocks have formed in a continental volcanic arc environment. The Tuttle Formation forms the upper part of a siliciclastic wedge that was deposited in the foreland basin of the Yukon and Ellesmerian fold belts. Field investigations, limited to the ALTERATION STUDIES OF VOLCANIC ROCKS IN TOTMAJ eastern Richardson Mountains, identified the Tuttle Formation AREA, SE OF KASHAN as alternating resistant and recessive intervals. Resistant Aminoroaya yamini, M. and Kananian, A., School of intervals, 23 to 54 m thick, comprise five lithofacies units Geology, University College of Science, University of including fining-upward sandstone, massive sandstone, Tehran, Iran, [email protected] siltstone, conglomerate, and diamictite. The sandstone and conglomerate lithofacies of the Tuttle Formation are The Totmaj volcanic-Sedimentary rocks district contains the characterized by tripolitic chert and quartz grains, ranging from Oligocene outcrops of lava flows (basalt, basaltic-andesite and fine-grained sandstone to pebble conglomerate. Recessive andesite), pyroclastics (various types of tuffs and agglomerate) intervals, 55 and 144 m thick, consist of siltstone and shale and and sedimentary rocks (limestones and sandstones) which have are mostly covered. Field investigations suggest that the Tuttle been hydrothermal altered. Formation represents deposition within a turbidite sequence. Secondary minerals have been formed of this olteration such as Rock Eval/TOC results from samples collected in the field epidote, chlorite, calcite, quartz, hematite and sericite. The indicate that organic matter within the Tuttle Formation is microprobe analyses result of plagioclase and pyroxene defined composed of Type III and admixtures of Type II/III kerogen, they respectively have composition Ab98 and W40En65Fs35. which are typically gas-prone. Total organic carbon content Chlorite minerals present with composition Picnochloritte and values suggest that the Tuttle Formation has a good to very Clinochlor in the body rock. Geothermometic studies of chlorite good potential to produce hydrocarbons, typically ranging minerals show that they have formed in temperature about 270 between 1 and 4% TOC. Thermal maturation (Tmax) indicate ± 30EC. On the basis of these result and limit of stability that the organic matter is in the immature to mature stage of temperature in coexisting minerals with chlorite (such as thermal diagenesis. 2 epidote, actinolite, calcite and quartz) seemingly Totmaj volcanic Laboratory, University of Toronto, using U-Pb IDTIMS methods rocks altered in temperature about 270 ± 30EC. on zircon and monazite. In the foliated meta-tonalite, four single zircon crystals and three monazite crystal fragments were analyzed. Zircons are AN INSIGHT INTO THE MINERALOGY AND translucent subhedral with 2/1 aspect ratios. They have GEOCHEMISTRY OF A DISTURBED MINING ZONE AT THE 207Pb/206Pb ages of 2357±6 (6.5% discordant), 2355±8 (7.0% WORLD-CLASS PCS ALLAN MINE, SASKATCHEWAN: discordant), and 2334±4 Ma (6.2% discordant). These have POSSIBLE VECTORS TO THE PREDICTION OF LOWER Th/U values of 0.33-0.37, typical for magmatic zircon. The ORE GRADES fourth datum is distinctly younger and is interpreted to be of Annesley, I.R., McCready, A.J., Mineral Exploration, metamorphic origin. It is 4.2% discordant from a 207Pb/206Pb age Saskatchewan Research Council, Saskatoon, SK, S7N of 1818±2 Ma with very low Th/U of 0.04, typical of metamorphic 2X8, [email protected], Danyluk, T. and Appleyard, J., st zircon. Two of the monazite data overlap the metamorphic Potash Corporation of Saskatchewan, Suite 500 122-1 zircon age with 207Pb/206Pb ages of 1821±2 (0.5% discordant) Ave South, Saskatoon, SK, S7K 7G3 and 1816±2 (0.7% discordant). The third datum is younger at Saskatchewan is the world's largest producer of Potash and 1803±1 (0.07% discordant). The spread in these data may accounts for about 25 per cent of the world’s potash production. indicate metamorphic conditions first at about 1821 Ma, and Structural disturbance zones are sporadically present in many again later at ca. 1803 Ma (the concordant monazite age). A mines sites, which result in a decrease in ore grade and create regression line calculation through zircon data and anchored at potential catastrophic water inflow problems. The 1803
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