Continental Lower Crust: Editors: D.M. Fountain, R. Arculus and R.W. Kay, developments in geotectonics 23. Elsevier, Amsterdam, 1992. 496 pp. Price: US$ 125.50/Dfl. 220.00. ISBN 0-444-88294-4     

Kevin Smith 《Lithos》1994,31(3-4):229-231

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Formulation and characterization of an appropriate lime-based mortar for use with a porous limestone     

Kevin Beck  Muzahim Al-Mukhtar 《Environmental Geology》2008,56(3-4):715-727

Several studies have shown that the degradation of architectural monuments constructed using Tuffeau stones from Val de Loire region of France over a period of time are often related to use of mortars that are not compatible with the Tuffeau stones. For this reason, it is important to ensure physico-chemical compatibility between Tuffeau and the mortar. To alleviate differences in compatibility characteristics, a mortar is prepared from hydrated lime and aggregates obtained from the crushing of Tuffeau stone and used in this study. The key parameters that influence the strength and durability characteristics such as mechanical resistance, water transfer properties, and physico-chemical properties were identified and studied. Based on these studies, recommendations are offered for the preparation of a more compatible mortar that can be used in the construction and restoration of monuments using Tuffeau stone.  相似文献   

Uncertainties in the SNOWPACK multilayer snow model for a Canadian avalanche context: sensitivity to climatic forcing data     

Kevin Côté  Jean-Benoît Madore  Alexandre Langlois 《自然地理学》2017,38(2):124-142

Abstract

As interest in outdoor activities in remote areas is increasing, there is a strong need for improved avalanche forecasting at the regional scale. Due to important logistical and safety matters, avalanche terrain measurements (avalanche observations, snowpack profiles, and stability tests) are not always possible for practitioners/forecasters. An interesting alternative would be to analyze the snowpack without these challenges by using snow model outputs. The SNOWPACK model is currently used operationally for avalanche forecasting and research in the Swiss Alps. Thus, this paper presents a summary of analyses that have been conducted to assess the potential of using the SNOWPACK model driven with both in-situ and forecasted meteorological data in three different Canadian climate and geomorphological contexts. A comparison of meteorological data from in-situ and predicted datasets for two winters shows that the GEMLAM weather model is the most accurate for the three climatic contexts of this project, but also showed a bias proportional to precipitation intensity/rate. Snow simulations forced with GEMLAM are the closest to field measurements. Finally, predictions of persistent weak layers have been validated using the InfoEx platform from Avalanche Canada. Crust and surface hoar formation dates agree with the information reported in InfoEx.  相似文献   

Silica diagenesis in Cenozoic mudstones of the North Viking Graben: physical properties and basin modelling          下载免费PDF全文

Thilo Wrona  Christopher A.‐L. Jackson  Mads Huuse  Kevin G. Taylor 《Basin Research》2017,29(Z1):556-575

Silica diagenesis can significantly change physical properties of the host strata and release large volumes of water. Predicting these changes and their timing is essential to understanding compaction, fluid flow and rock deformation in sedimentary basins. In this paper, the influence of silica diagenesis (opal‐A/CT transformation) on physical properties is determined, the sediment volume affected by these changes is mapped, and a new technique to model silica diagenesis is introduced. A petrophysical analysis of 16 exploration wells shows that the opal‐A/CT transformation leads to a porosity reduction of c.20% (from 49 to 29%) in Cenozoic mudstones of the North Viking Graben. Using three‐dimensional seismic reflection data, it is shown that the c.50 m thick opal‐A/CT transformation zone covers an area of >1500 km², equating to a minimum volume of 75 km³. The spatial and temporal evolution of opal‐A/CT transformation is simulated using an innovative basin modelling approach, the results of which indicate that the transformation started around Middle‐to‐Late Eocene times and then migrated upwards until it gradually fossilised between the Miocene and present. These findings are important, as they help understanding how these sediments compact and when fluids are released by diagenesis.  相似文献   

“Grey swan” storm surges pose a greater coastal flood hazard than climate change     

Horsburgh  Kevin  Haigh  Ivan D.  Williams  Jane  De Dominicis  Michela  Wolf  Judith  Inayatillah  Addina  Byrne  David 《Ocean Dynamics》2021,71(6-7):715-730

Ocean Dynamics - In this paper, we show that over the next few decades, the natural variability of mid-latitude storm systems is likely to be a more important driver of coastal extreme sea levels...  相似文献   

Book Review Forum—Learning the City with Colin Mcfarlane     

Neil M. Coe  Ananya Roy  Kevin Ward  Andrew Harris  Ola Söderström  Tim Bunnell 《Urban geography》2013,34(1):131-150

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A search for ⁶Li in stars with planets     

Bacham E. Reddy  David L. Lambert  Chris Laws  Guillermo Gonzalez  Kevin Covey 《Monthly notices of the Royal Astronomical Society》2002,335(4):1005-1016

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The Meteoritical Bulletin,No. 90, 2006 September     

Harold C. Connolly  Jutta Zipfel  Jeffrey N. Grossman  Luigi Folco  Caroline Smith  Rhian H. Jones  Kevin Righter  Michael Zolensky  Sara S. Russell  Gretchen K. Benedix  Akira Yamaguchi  Barbara A. Cohen 《Meteoritics & planetary science》2006,41(9):1383-1418

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Ernst Zinner,lithic astronomer     

Kevin D. McKeegan 《Meteoritics & planetary science》2007,42(7-8):1045-1054

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Future trends in transport and fate of diffuse contaminants in catchments,with special emphasis on stable isotope applications     

Jeffrey Turner  Hans‐Jrgen Albrechtsen  Mike Bonell  Jean‐Pierre Duguet  Bob Harris  Rainer Meckenstock  Kevin McGuire  Roger Moussa  Norman Peters  Hans H. Richnow  Barbara Sherwood‐Lollar  Stefan Uhlenbrook  Henny van Lanen 《水文研究》2006,20(1):205-213

A summary is provided of the first of a series of proposed Integrated Science Initiative workshops supported by the UNESCO International Hydrological Programme. The workshop brought together hydrologists, environmental chemists, microbiologists, stable isotope specialists and natural resource managers with the purpose of communicating new ideas on ways to assess microbial degradation processes and reactive transport at catchment scales. The focus was on diffuse contamination at catchment scales and the application of compound‐specific isotope analysis (CSIA) in the assessment of biological degradation processes of agrochemicals. Major outcomes were identifying the linkage between water residence time distribution and rates of contaminant degradation, identifying the need for better information on compound specific microbial degradation isotope fractionation factors and the potential of CSIA in identifying key degradative processes. In the natural resource management context, a framework was developed where CSIA techniques were identified as practically unique in their capacity to serve as distributed integrating indicators of process across a range of scales (micro to diffuse) of relevance to the problem of diffuse pollution assessment. Copyright © 2006 John Wiley & Sons, Ltd.  相似文献