News 2020 IUGS CGGB congresses

2020 IUGS CGGB congresses

The IUGS Commission on Global Geochemical Baselines is actively participating in international congresses:

2 to 8 March 2020 - POSTPONED TO AUGUST 2021 DUE TO THE COVID-19 PANDEMIC:  36th International Geological Congress.  Delhi, India.  Website:  The IUGS Commission on Global Geochemical Baselines is organising a session with the title: 17.8 Challenges and Opportunities of Global-Scale Geochemical Mapping (4th Arthur Darnley Symposium) under Theme 17:  Advances in Geochemistry.  Session conveners:  David B. Smith, Katherine Knights, Patrice de Caritat, Xueqiu Wang and Alecos Demetriades.

Session summary:  Global-scale, or continental-scale, geochemical surveys cover millions of square kilometres of the Earth’s surface generally at a very low sample density (1 site per 1,000 to 10,000 km2). Geochemical patterns produced from these low-density surveys are connected to processes related to many factors including tectonics and climate and in turn to weathering, geochemical and mineralogical composition of the original soil parent material, continental-scale glaciation, topography, regional-scale alteration and mineralization, and in some cases, human activity.  Over the past 15 years, several global-scale geochemical surveys have been conducted (Australia, China, Europe, India, Mexico, United States) and the data and maps are being used as a tool to aid in environmental and resource management. This symposium aims to focus on case histories from global-scale geochemical mapping programs, the lessons learned from the surveys, and the opportunities for utilising the data for the benefit of humankind. In addition, presentations of results from higher-density geochemical surveys conducted at national to local scales.

In addition, a short one-day Workshop is organised with the title:  Geochemical mapping at all scales:  Continental, regional and local (WSC23: with tutors:  Alecos Demetriades, Philippe Négrel and David Cohen.  Registration preferably by the 31st of January 2020.  The workshop is free to all interested attendees.

Workshop objective:  To provide those interested in applied geochemistry an introduction to the professional design and application of geochemical mapping surveys from fieldwork to data interpretation.

Workshop summary:  In mineral exploration and environmental geosciences, understanding the geochemical patterns on the Earth's surface requires the application of well-designed geochemical surveying methods that can be applied at the local, regional and even global scales. The aim of the one-day workshop is to introduce methods for designing and implementing regional geochemical surveys. This ranges from selection of sampling media and analytical methods to visualising and interpreting the results.  All geochemical methods and techniques will be presented and discussed by using documented real data sets from various case studies from around the Globe.




2 to 9 August 2020 - POSTPONED TO AUGUST 2022 DUE TO THE COVID-19 PANDEMIC:  Conference theme: Environment, Health, GIS and Agriculture in the Big Data Era3 conferences combined:  (a) 5th International Symposium on Environment and Health; (b) 6th International Conference on Environmental Pollution and Health, and (c) 7th International Conference on Research Frontiers on Chalcogen Cycle Science and Technology The IUGS Commission on Global Geochemical Baselines, the EuroGeoSurveys Geochemistry Expert Group, and the International Association of GeoChemistry are organising a session with the title:  Geochemical mapping at all scales: evidence from soil, sediment, water and plants.  Session conveners are:  Philippe Négrel and Alecos Demetriades.  Deadline for abstract will be announced in due course.  Galway, Ireland.

Session summary:  Geochemical mapping is an established method for studying the spatial distribution of chemical elements in different media, e.g., rock, soil, water, sediment and plants, and to document changes in their chemical composition occurring in different compartments of the ecosystem. Depending on the target and question to be answered, the resulting geochemical data can be used in mineral exploration, environmental, medical and forensic sciences, agriculture, forestry, land use planning, etc.

The results of geochemical mapping allow understanding of natural processes operating at the continental to regional scale, such as weathering, climate, tectonic evolution, etc. At present, it is crucial, not only to provide background levels of elements, but also to understand and to document the consequences of contamination on the surface environment, which is no longer pristine and undergoes changes caused by human activities. Modern geochemical mapping relies on building databases and providing digital data services to the community as a whole. Geochemistry is a highly quantitative methodology utilising, apart from highly sophisticated analytical techniques, advanced mathematical, statistical and spatial methods for processing and presentation of the generated analytical data.

While broad scale geochemical mapping gives the overall background levels of elements even at the continental scale, the regional mapping provides information to more regional catchment basin questions such as the chemical status of various types of soil (forest, agricultural, urban), groundwater, etc., and the local geochemical mapping gives important answers to local questions. Geochemical data sets have, therefore, a high impact on socio-economic aspects and the well-being of humans and animals, because they provide significant information about the quality of the ‘inhabited’ environment including agricultural soil, drinking water, building materials, etc., and can be directly used by authorities and policy makers, e.g., for defining guideline values.

The aim of the session is to present the status of geochemical mapping in the XXI century with the rapid development of novel methods, and unavoidable presence in the digital world with focus on continental, regional and local (e.g., catchment or urban environment) scale geochemical mapping data sets, using various sampling media, like soil, sediment, water, plants, etc.  


For additional information consult the Conferences web page.