Depositional History of Sediments in Lake Athabasca


Book Description

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


Book Description

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


Book Description

"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.







The Journal of Geology


Book Description

Vols. for 1893-1923 includes section: "Reviews."




Bulletin


Book Description







Economic Geology


Book Description

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.




Ore Deposit Geology and its Influence on Mineral Exploration


Book Description

Why another book about Ore Deposits? There are a number of factors which motivated us to write this text and which may provide an answer to this question. Firstly our colleagues are predominantly mining engineers and minerals processing technologists, which provides us with a different perspective of ore deposits from many academic geologists. Secondly we have found that most existing texts are either highly theoretical or merely descriptive: we have attempted to examine the practical implications of the geological setting and genetic models of particular ore deposit types. We have written the text primarily for undergraduates who are taking options in Economic Geology towards the end of a Degree Course in Geology. However, we hope that the text will also prove valuable to geologists working in the mining industry. The text is to a large extent based on a review of the existing literature up to the end of 1984. However, we have visited most of the mining districts cited in the text and have also corresponded extensively with geologists to extend our knowledge beyond the published literature. Nonetheless writing a text-book on Ore Deposits is a demanding task and it is inevitable that sins of both omission and commission have been committed. We would therefore welcome comments from readers which can be incorporated in future editions. RICHARD EDW ARDS KEITH ATKINSON Cmnhome School (~n\1illcs April 1985 Glossary Adit A horizontal, or near horizontal, passage from the surface into a mme.