Browsing Earth and Environmental Sciences by Supervisor "Kendall, Brian"
Now showing items 1-13 of 13
-
Comparing thallium isotopes to paleosalinity and Mo-U isotope paleoredox proxies: A case study of the Upper Devonian Kettle Point Formation, Ontario
(University of Waterloo, 2023-06-22)Black shale formations are utilised to reconstruct ancient global ocean redox conditions by analyzing and inferring their geochemical and isotopic compositions. However, the accuracy of these reconstructions can decrease ... -
Development of Molybdenum Isotopes as Petroleum Tracers: The Phosphoria Petroleum System, Bighorn Basin, U.S.A.
(University of Waterloo, 2018-05-22)The application of Mo isotope compositions in petroleum systems is a new field of research. In this study, elemental concentrations and Mo isotope compositions were measured on crude oils, asphaltenes separated from the ... -
Early Paleozoic Ocean Redox Dynamics: Perspectives from Uranium Isotopes of Sedimentary Rocks
(University of Waterloo, 2022-11-23)The trajectory of global ocean oxygenation could have greatly influenced the metazoan evolutions because O2 could provide valuable energy to support biological activities. Remarkable metazoan diversifications occurred ... -
The Effectiveness of Persulfate and Hydrogen Peroxide on the Oxidation of Hydrocarbon Contaminants at 30°C: A Study with Focus on the Performance of Compound Specific Isotope Analysis
(University of Waterloo, 2018-07-05)Two oxidants, persulfate and hydrogen peroxide, were used to investigate the effectiveness of in-situ chemical oxidation (ISCO) on target contaminants (sourced from industrial wastewater) in saline and high-temperature ... -
Experimental determination of the extent of Fe(III) reduction and Fe isotope fractionation during microbial reduction of ferrihydrite in freshwater systems by sulfate-reducing bacteria
(University of Waterloo, 2017-12-15)Traditionally, sulfur was thought to have little influence on Fe cycling in freshwater systems because of the low sulfate concentrations (average ~ 0.2 mM) in such waters. However, a recent study suggested that a cryptic ... -
Fingerprinting and tracing the signature of basement-hosted unconformity-type uranium alteration through thick Quaternary tills: an example from the Thelon Basin, Nunavut
(University of Waterloo, 2016-05-17)The question of whether or not it is possible to trace the signature of alteration haloes surrounding deep-seated unconformity-type U mineralization through thick Quaternary tills is one of great importance for those ... -
Integration of Geochemical and Isotopic Analyses of Fracture Minerals and Fluids to Assess the Deep Geological Stability at Chalk River Laboratories, Chalk River, Canada
(University of Waterloo, 2019-09-30)The crystalline bedrock underlying the Chalk River Laboratories (CRL) at Canadian Nuclear Laboratories (CNL) provides a valuable analogue for potential nuclear waste storage sites. As the main pathways for fluid flow in ... -
Long-lived Anatexis in the Exhumed Middle Crust from the Torngat Orogen and Eastern Core Zone: Constraints from Geochronology, Petrochronology, and Phase Equilibria Modeling
(University of Waterloo, 2016-05-11)The Torngat Orogen (southeastern Churchill Province, Canada) is a transpressional Paleoproterozoic orogen resulting from the collision between the North Atlantic Craton and the Core Zone (an Archean micro-continent) during ... -
Mo isotope variations in molybdenites at single-crystal, ore deposit, and global scales: Implications for Mo source fluid, transport, fractionation mechanisms, and molybdenite mineralization
(University of Waterloo, 2018-05-22)In this study, the Mo isotopic composition (δ98Mo) of molybdenite from 29 hand samples from various ore deposit types was analyzed. This data was compiled with data from the literature and all data (n = 420) was reported ... -
Reconstruction of Local and Global Marine Paleoredox Conditions during Deposition of the Devonian-Mississippian Exshaw Formation (Black Shale Member) and the Evaluation of Hydrocarbon Maturation Effects
(University of Waterloo, 2019-07-17)The end-Devonian Hangenberg event represented one of the biggest Phanerozoic mass extinctions. However, the potential mechanism(s) for triggering this event, including climate cooling, sea-level change, glaciation and ocean ... -
Reconstruction of local and global marine paleoredox conditions for the northeast-Panthalassan (British Columbia, Canada) expression of the Toarcian Oceanic Anoxic Event using a multi-proxy approach
(University of Waterloo, 2020-01-23)The Toarcian Oceanic Anoxic Event (T-OAE) of the Early Jurassic is one of several Mesozoic instances of expanded ocean anoxia, coupled with feedbacks and perturbations in Earth’s systems. The drivers for these feedbacks ... -
Reconstruction of Local and Global Marine Redox Conditions During Deposition of Late Ordovician and Early Silurian Organic-Rich Mudrocks in the Siljan Ring District, Central Sweden
(University of Waterloo, 2016-01-12)The Ordovician-Silurian transition witnessed the second largest mass extinction in the Phanerozoic Eon and the Hirnantian glaciation. We measured U (as δ238U relative to standard CRM145 = 0‰) and Mo (as δ98Mo relative to ... -
Uranium and Molybdenum Isotope Constraints on Ocean Redox Conditions During Deposition of the Upper Devonian Kettle Point Formation, Ontario
(University of Waterloo, 2016-10-18)The Late Devonian extinction event was among the most severe Phanerozoic mass extinction events, which led to a decline in the abundance and diversity of marine and terrestrial ecosystems, particularly tropical shallow-marine ...