Browsing Earth and Environmental Sciences by Title
Now showing items 297-316 of 434
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Paleo-Ice Sheet and Deglacial History of the Southwestern Great Slave Lake Area
(University of Waterloo, 2022-01-28)The western Laurentide Ice Sheet (LIS) is known to have experienced complex ice-flow shifts during the last glaciation due to ice divide migration and increasing topographic influence during deglaciation. Several glacial ... -
Paleoglaciological dynamics in northern Manitoba and the subglacial bed mosaic
(University of Waterloo, 2013-06-24)During the last glacial maximum (LGM), some 20 ka ago, northern Manitoba was situated beneath 3 to 4.5 km of ice, on the outer fringe of a major ice spreading center of the Laurentide Ice Sheet. The region has also been ... -
Paleozoic evolution of western Marie Byrd Land, Antarctica
(Geological Society of America, 2015-09-01)We report geochemical data from (meta-) sedimentary and igneous rocks that crop out in the Ford Ranges of western Marie Byrd Land and discuss the evolution and reworking of the crust in this region during Paleozoic subduction ... -
Paleozoic transpressional tectonics in the Beishan orogenic collage, Northwest China: Evolution of the Hongliuhe suture zone
(University of Waterloo, 2016-01-21)The Beishan orogenic collage is a southern, central subset of the Central Asian Orogenic Belt, in Northwest China. It is an accretionary orogen that was active during the early Paleozoic, transitioning to convergent ... -
Paradigm Shift: Does River Metabolism Mask the Isotopic Signal of Nitrate Sources?
(University of Waterloo, 2017-05-19)Nitrate (NO₃⁻) is the most ubiquitous contaminant in surface and groundwaters in Canada. Synthetic fertilizer application and manure production in intensive agricultural areas contribute large quantities of NO₃⁻ to the ... -
Passive In Situ Treatment of Acidic and Neutral Mine Drainage: Field and Laboratory Investigations
(University of Waterloo, 2009-12-16)Water quality degradation is the foremost environmental issue faced by the mining industry. Negative impacts on water quality are commonly associated with unmitigated drainage emanating from sulfide-bearing mine waste ... -
Passive sampling to understand and predict sources of wastewater and agricultural contamination in rural watersheds
(University of Waterloo, 2023-07-12)Passive sampling techniques have emerged as valuable tools in environmental monitoring, offering distinct advantages over traditional discrete sampling methods. Discrete sampling techniques are only representative of the ... -
Performance of Treatment Media for the Stabilization of Mercury under Variable Geochemical Conditions
(University of Waterloo, 2010-10-01)Mercury-contaminated sediments are found in many locations throughout North America and the world. Release of Hg from such sediments and subsequent biological uptake can result in biomagnification in associated ecosystems. ... -
Persistence of Artificial Sweeteners, Phosphorus and Nitrogen in Three Septic System Plumes with Differing Redox Conditions
(University of Waterloo, 2018-10-31)Septic systems are widely used for on-site wastewater treatment throughout Canada, including at most of Ontario’s provincial parks. They are frequently located in unconfined aquifer systems that may also be used for water ... -
Perturbations to nutrient and carbon cycles by river damming
(University of Waterloo, 2017-06-30)The damming of rivers represents one of the most far-reaching human modifications to the flows of water and associated matter from land to sea. Globally there are over 70 000 large dams whose reservoirs store more than ... -
Petrogenesis of Archean granitoids: Insights from inverse and forward modelling
(University of Waterloo, 2022-06-24)Archean granitoids are the earliest representation of continental crust on Earth. The Archean geological record is dominated by rocks of the tonalite–trondhjemite–granodiorite (TTG) suite, which are thought to have formed ... -
The Petrogenesis of Pseudocarbonatites in Bancroft Region, Southwestern Grenville Province
(University of Waterloo, 2022-02-15)Carbonatites are rare igneous rocks that form from fractionation of carbonate-rich, silica undersaturated magma. The petrogenesis of pseudocarbonatites (rocks that are similar to carbonatites, but without a clear mantle ... -
Petrogenesis of the Bissett Creek flake graphite deposit: Implications for regional graphite mineralization models in the Grenville Province, Ontario
(University of Waterloo, 2018-07-16)Graphite is a critical component of green and renewable energy technologies. In Ontario, graphite deposits are scattered throughout the pre-Grenvillian Laurentian Margin and the Composite Arc Belt of the Grenville Province. ... -
PETROLOGY, TECTONIC SETTING, AND REGIONAL IMPLICATIONS OF THE OPHIOLITIC LIUYUAN COMPLEX, NW CHINA
(University of Waterloo, 2023-01-03)Located along the southern margin of the Central Asian Orogenic Belt (CAOB), the mafic 290-280 Ma Liuyuan Complex stratigraphy and tectonic setting have been controversial for decades. Here, the results of a detailed field ... -
Phase Relations, Reaction Sequences and Petrochronology
(Mineralogical Society of America, 2017-02-01)Phase equilibria modelling has played a key role in enhancing our understanding of metamorphic processes. An important breakthrough in the last three decades has been the ability to construct phase diagrams by integrating ... -
Phosphorus and Nitrogen Cycling in the Mediterranean Sea: Circulation, biogeochemistry and anthropogenic forcing
(University of Waterloo, 2017-04-28)The Mediterranean Sea (MS) is an oligotrophic marine basin despite being semi-enclosed with unusually low inorganic phosphorus (P) and nitrogen (N) concentrations, and high nitrate (NO₃):phosphate (PO₄) ratios comparative ... -
Phosphorus Legacies and Water Quality Risks: A Vulnerability-Based Framework in Southern Ontario
(University of Waterloo, 2019-12-20)Excess phosphorus (P) loading increases the frequency of harmful algal blooms (HABs), posing severe threats to drinking water security and aquatic ecosystems. Efforts to reduce the inputs of P to Canadian agricultural soils ... -
Phosphorus retention and transformation in a dammed reservoir of the Thames River, Ontario: Impacts on phosphorus load and speciation
(Elsevier, 2022-02)Extensive efforts are underway to reduce phosphorus (P) export from the Lake Erie watershed. On the Canadian side, the Thames River is the largest tributary source of P to Lake Erie’s western basin. However, the role of ... -
Photosphere Tour Guide
(University of Waterloo, 2021-08-20)This document serves as a comprehensive guide for creating and implementing Virtual Reality (VR) into education at the post-secondary level, as well as recommendations for integrating course learning objectives in Virtual ... -
Physical and Geochemical Characterization of Two Wetlands in the Experimental Lakes Area, North-western Ontario, Canada
(University of Waterloo, 2012-09-27)Anthropogenic disruptions in the form of hydrological alterations, such as dam construction and the associated water diversions are a cause of much upheaval to local and regional ecosystems. Lake 626 within the Experimental ...