News 2021 IUGS CGGB congresses

2021 IUGS CGGB congresses


The IUGS Commission on Global Geochemical Baselines has organised a free virtual workshop on Compositional Data Analysis

Workshop title:  Extracting, visualising and interpreting structure in geochemical data through compositional data analysis (CoDA)

Workshop Presenters:  Eric Grunsky, Michael Greenacre

Workshop Date:  Thursday, 18 November  2021                            

For the Workshop Description and other details consult the Conferences and Workshop web pages. 


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

Goldschmidt2021 • Lyon, France • 4 - 9 July

The Organizing Committee has decided that Goldschmidt2021 will be in a hybrid formatcombining an onsite meeting for delegates who can travel, with an online meeting for those who cannot, while aiming to promote as much interaction as possible between the two types of delegates. We also know that it is very difficult to predict what the situation will be like in July and, should a physical conference in Lyon ultimately not be possible, we may need to move to a fully online meeting.

The following session is organised by the IUGS Commission on Global Geochemical Baselines and the EuroGeoSurveys Geochemistry Expert Group (Conveners: Philip Negrel, Anna Ladenberger):


THEME 12:  Environmental Geochemistry and Human Health


Session 12c:  Geochemical mapping at all scales for all reasons


Session summary:

Systematic geochemical mapping is a well-established methodology to document the spatial variation of chemical elements in geomaterials occurring at or below the Earth’s surface, i.e., rock, soil, sediment, stream water, groundwater, and vegetation. Geochemical mapping is performed at different sample densities resulting in various map scales depending on project objectives and final user needs. Geochemical maps are used to present the geographical distribution of chemical elements and provide an exceptional tool for estimating the geochemical baseline at a given scale. In addition to providing a visualisation of the geochemical landscape, modern geochemical mapping also includes and requires advanced quantitative methodologies such as mathematical, statistical, and spatial methods for processing and presentation of analytical data. The resulting geochemical database has a wide range of applications, including mineral exploration, agriculture, forestry, land use planning, environmental monitoring, medical and forensic science, etc. This session welcomes submissions that are concerned with both developing geochemical maps at continental to regional and local scales, as well as those that utilise spatial geochemical data to gain valuable insights in topics including but not limited to: (1) interpretation of the spatial variation of elements, (2) understanding the geochemical character of various environmental compartments, (3)  delineation of very large patterns, such as metallogenic provinces, (4) relationships between geochemical, geomedical and epidemiological data, (5) urban geochemistry and land use planning, (6) sustaining food security and clean water, and many other applications.


The abstract submission deadline is 26 February (23:59 CET)

For info and details please visit the conference website:





The planned Session and Workshop that the IUGS Commission on Global Geochemical Baselines was organising on the occasion of the 36th International Geological Congress (Delhi, India) with the title: Challenges and Opportunities of Global-Scale Geochemical Mapping (4th Arthur Darnley Symposium) may still be organised as a virtual congress and workshop.

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.

Workshop title:  Geochemical mapping at all scales:  Continental, regional and local.

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.