Earth and Environmental Sciences: Recent submissions
Now showing items 201-220 of 831
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40Ar/39Ar Thermochronology of the Britt Domain Grenville Province - Georgian Bay, Ontario
(1989-04-15)The 40Ar/39Ar thermochronology of a transect of the Britt domain, Central Gneiss Belt, Grenville Province has been examined in this study. In total, twelve argon gas analyses were obtained. These came from five locations ... -
Geological Investigation of a Mineralized Granitic Cupola, Kempt Snare Lake, Yarmouth County, Nova Scotia
(1988-04-15)At Kempt Snare Lake, a leucogranite and leucomonzogranite cupola, with a composition similar to the Davis Lake Pluton, intrudes the metawackes of the Goldenville Group. 40Ar/39Ar dating constrains the age of intrusion to ... -
Cooling and Uplift Pattern of the Liberty Hill Pluton, South Carolina, USA
(1988-04-15)The Liberty Hill pluton is one of a series of post-metamorphic plutons emplaced in the central and eastern Piedmont province of the Appalachians in the late Paleozoic. An investigation of the post-magmatic cooling and ... -
Latest Pleistocene-Holocene Paleoceanographic Trends on the Inner Scotian Shelf off the South Shore of Nova Scotia: Benthonic Foraminiferal Evidence
(1988-04-15)Two piston cores, 78-005-112 and 77-002-15, from the Inner Scotian Shelf off the South Shore of Nova Scotia provide the basis for a micropaleontological study of the paleoceanographic trends. The study of benthonic ... -
Examination of a Zoned Pegmatite and Host Rocks At Port Joli, Nova Scotia
(1988-04-15)The Wickwire pegmatites are located Port Joli Harbour, approximately 28 km southeast of Liverpool, Queens County, Nova Scotia. These pegmatites form a series of semi-parallel veins and dykes, which vary in thickness from ... -
A Comparative Petrological Study of Three Nova Scotian Intrusions: the Jeddore Dyke, the Sober Island Dyke, and the Marshdale Intrusive
(1988-04-15)A thorough investigation of three igneous bodies found in Nova Scotia (Jeddore dyke, Sober Island dyke, and Marshdale plug) has brought out a number of important results. The two dykes, located along the Eastern Shore, are ... -
Gravity Modelling of the Liscomb "Satellite" Pluton
(1988-04-15)The Liscomb "Satellite" Pluton is a small granitoid mass located northwest of the main Liscomb Complex in central Nova Scotia. Detailed gravity data has been obtained over the smaller pluton, and from the surrounding area. ... -
Petrography and Geochemistry of Anhydrite Units from the Canadian Salt Company Mine, Pugwash, Cumberland County, Nova Scotia
(1987-04-15)Evaporitic rocks exposed in the workings of the Canadian Salt Company Mine at Pugwash, Nova Scotia consist of massive, nodular and stylolitic anhydrite and clear white, reddish brown to black halite with minor occurrences ... -
Paleoenvironmental Analysis of Halifax Harbour: Sedimentology, Paleoclimatology, and Holocene Sea Level
(1994-03-15)Three cores (numbered 2,9,10) collected from Halifax Harbour using new submersible vibracoring equipment permits a reinterpretation of an acoustically distinct seismostratigraphic unit. This unit, never previously sampled, ... -
Sediment Consolidation and Permeability at the Central Oregon Margin, Ocean Drilling Program Sites 891 and 892
(1994-03-15)Sediment hydraulic conductivity is a critical and highly variable control on the consolidation of accretionary prism materials. The consolidation state and pore pressure conditions within an accretionary prism ultimately ... -
Geochemistry and Petrogenesis of Late Cretaceous Bentonites from the Kanguk Formation, Axel Heiberg and Ellesmere Islands, Canadian High Arctic
(1994-03-15)Petrographic and geochemical analyses of bulk bentonites, volcanic minerals, and unaltered glass inclusions in quartz phenocrysts reveal the composition and tectonic setting of Late Cretaceous explosive volcanism in the ... -
Physical Volcanology, Petrology, and Petrogenesis of the Cretaceous Isachsen Formation Volcanics, Western Axel Heiberg Island, N.W.T.Formation Volcanics, Western Axel Heiberg Island, N.W.T.
(1994-03-15)New data from Bjarnasson Island and Bals Fiord on western Axel Heiberg Island provide insight into the physical volcanology, petrology, and petrogenesis of Cretaceous Isachsen Formation magmatism. The Bjarnasson Island ... -
GEOMETRY AND DEPOSITIONAL SETTING OF THE LATE CARBONIFEROUS MULLINS COAL IN THE SOUTH BAR FORMATION, SYDNEY BASIN, NOVA SCOTIA
(1994-03-15)The three-dimensional geometry of the Mullins Coal (Westphalian C) provides information about its origin and potential for commercial exploitation. Controls for peat accumulation are allogenic in contrast to a previous ... -
Comparison of Siliceous Volcanics from the Clarno and John Day Formations, Oregon
(1993-03-15)The Tertiary Clarno and John Day Formations occur in the Blue Mountains Region of north-eastern Oregon. The two formations are easily distinguishable overall, because the Clarno consists primarily of andesitic to dacitic ... -
Holocene Relative Sea-Level Change in Nova Scotia
(1993-03-15)Core samples collected around Atlantic Canada, specifically from the West Head salt marsh, Chezzetcook Inlet, enable temporal and spatial examination of benthic foraminiferal assemblages. Benthic foraminiferal zonations, ... -
40Ar/39Ar Thermochronology Across a Transect of the Eastern Grenville Front Tectonic Zone and the Western Britt Domain of the Grenville Province, Georgian Bay
(1993-03-15)40Ar/39Ar thermochronology of hornblendes from granitic gneiss and amphibolites in the Central Gneiss Belt (CGB) west of Key Harbour along northern Georgian Bay yields ages ranging from 1016 - 995 Ma. Muscovites from the ... -
Structure of the Dunamagon Granite, Baie Verte Peninsula, Newfoundland
(1994-03-15)New Structural data from field observations and microstructural analysis are the basis of description of structures in the Dunamagon Granite, for the purpose of determining whether it has an intrusive, or tectonic, contact ... -
Paleoceanographic Reconstruction of the Inner Scotian Shelf During the Younger Dryas: A Benthic Foramineral Study
(1994-03-15)Examination of foraminifera from piston core 91-018-53P permits a paleoceanographic reconstruction of the Inner Scotian Shelf, with emphasis on the Younger Dryas cold period. A minimum in the total number of foraminifera ... -
Contact Relations Between The New Ross Leucomonzogranite and the Falls Lake Mafic Porphyry: Evidence for Magma Interactions in the South Mountain Batholith
(1994-03-15)The South Mountain Batholith is a peraluminous composite batholith that intruded over a short interval of time. The batholith consists of 260 intrusive bodies, thus the possibility of magma-magma interactions is high. The ... -
The Geochemistry and Geochronology of the Shelburne Dyke of Nova Scotia and the Messejana Dyke of Spain
(1994-03-15)This paper is a geochemical and geochronological study of two rift-related Mesozoic basaltic dykes. The Shelburne Dyke of Nova Scotia and the Messejana Dyke of Spain are extensive vertical sheets of intrusive rock that are ...