Depositional History of Sediments in Lake Athabasca
Depositional History of Sediments in Lake Athabasca

Author: Richard A. Bourbonniere

Publisher:

Published: 1996

Total Pages: 158

ISBN-13:

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The primary objective of this study was to collect and analyse high quality, well-described sediment cores for use in defining the depositional history of sediment-bound contaminants in Lake Athabasca, including those which have atmospheric or upstream sources. The researchers dated the cores using the lead and caesium methods, and used these geochronological results to determine sedimentation rates and time scales, as well as the suitability of the cores for subsequent contaminant analyses. Selected cores were to be analysed for particle size distribution, bulk carbon and nitrogen species, radionuclides, total polychlorinated dioxins and furans, heavy metals, polynuclear aromatic hydrocarbons, fatty acids, and biogeochemical marker parameters derived from alkanes and fatty acids. Results presented include trends in contaminant concentrations over the past century, correlations of observed trends with human activities or natural occurences, and likely sources of sediment contaminants.

Depositional History of Sediments in Legend and Weekes Lakes
Depositional History of Sediments in Legend and Weekes Lakes

Author: Richard A. Bourbonniere

Publisher:

Published: 1996

Total Pages: 74

ISBN-13:

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The primary objective of this study was to examine whether sediment cores from headwater lakes can be used to track naturally produced biomarkers and contaminants transported atmospherically. The researchers addressed this objective specifically by dating sediment cores from Legend and Weekes lakes in northern Alberta. They dated the cores using the lead and caesium methods, and used these geochronological results to determine sedimentation rates and time scales, as well as the utility of the cores for subsequent contaminant analyses. Cores were also analysed for bulk parameters such as particle size distribution, bulk carbon and nitrogen species, and atomic carbon/nitrogen ratios in order to obtain indications of the consistency of the depositional environment. Results from these two reference lakes will be compared with results of contaminant analyses on Lake Athabasca cores to determine if contaminants in Lake Athabasca sediments originate from atmospheric or upstream effluent sources.

The Peace-Athabasca Delta
The Peace-Athabasca Delta

Author: Kevin P. Timoney

Publisher: University of Alberta

Published: 2013-09-15

Total Pages: 610

ISBN-13: 0888648022

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"In the delta, water is boss, change is the only constant, and creation and destruction exist side by side." The Peace-Athabasca Delta in northern Alberta is a globally significant wetland that lies within one of the largest unfragmented landscapes in North America. Arguably the world's largest boreal inland delta, it is renowned for its biological productivity and is a central feature of a UNESCO World Heritage Site. Yet the delta and its indigenous cultures lie downstream of Alberta's bitumen sands, whose exploitation comprises one of the largest industrial projects in the world. Kevin Timoney provides an authoritative synthesis of the science and history of the delta, describing its ecology, unraveling its millennia-long history, and addressing its uncertain future. Scientists, students, leaders in the energy sector, government officials and policy makers, and conscientious citizens everywhere should read this lively work.

Economic Geology
Economic Geology

Author: Walter L. Pohl

Publisher: John Wiley & Sons

Published: 2011-03-03

Total Pages: 725

ISBN-13: 144439486X

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Humanity’s ever-increasing hunger for mineral raw materials, caused by a growing global population and ever increasing standards of living, has resulted in economic geology becoming a subject of urgent importance. This book provides a broad panorama of mineral deposits, covering their origin and geological characteristics, the principles of the search for ores and minerals, and the investigation of newly found deposits. Practical and environmental issues that arise during the life cycle of a mine and after its closure are addressed, with an emphasis on sustainable and "green" mining. The central scientific theme of the book is to place the extraordinary variability of mineral deposits in the frame of fundamental geological processes. The book is written for earth science students and practicing geologists worldwide. Professionals in administration, resource development, mining, mine reclamation, metallurgy, and mineral economics will also find the text valuable. Economic Geology is a fully revised translation of the the fifth edition of the German language text Mineralische und Energie-Rohstoffe. Additional resources for this book can be found at: www.wiley.com/go/pohl/geology. The author's website can be found at: http://www.walter-pohl.com.