Cel The aim of this project is to study mass and heat transfer from the Earth's mantle into the continental crust. This will include sources of melt, duration of thermal anomalies in the crust, the mixing of mantle and crustal fluids and the length and time scales of fluid migration in the crust. Central to an examination of the problems of mass and heat transfer from the Earth's mantle into the continental crust is the isotope composition of He in terrestrial fluids, as He is a unique tracer of fluids: escape of He from the atmosphere provides negligibly low background of atmospheric contaminant He in fluids; isotopic ratios of 3He/4He in the mantle are some 1000 times higher than those in the continental crust, making mantle contribution easy to identify; He is a chemically inert element and a conservative tracer of. mantle derived melt.A very large amount of He data, obtained earlier in the NIS, has still not been published. Within the framework of this project, available measurements of He isotope abundances in fluids will be compiled in a global database together with some other physical and chemical properties of the fluids. Some new isotope analysis will also be carried out in key areas. The data base will enable the first World Map (Atlas) of He isotope distribution on the Earth's surface to be produced. A comparison of this map with the geological and tectonic structure of the continents and heat flow distribution will enable details of crust-mantle interaction processes, which is the basic aim of the project, to be inferred.The expected results will be an improved understanding of some major geophysical and geochemical anomalies that exist in the Earth's continental crust. There are geophysical anomalies of exceptionally high heat flow and geochemical anomalies of high mantle-derived 3He. The relationship of these anomalies in terms of melt transport and heat transport from the mantle will be further understood.The results of this research will be communicated through international journals and through a final report including the compiled database. Program(-y) IC-INTAS - International Association for the promotion of cooperation with scientists from the independent states of the former Soviet Union (INTAS), 1993- Temat(-y) 52 - Geochemistry Zaproszenie do składania wniosków Data not available System finansowania Data not available Koordynator University of Cambridge Wkład UE Brak danych Adres Downing Street CB2 3EQ Cambridge Zjednoczone Królestwo Zobacz na mapie Koszt całkowity Brak danych Uczestnicy (3) Sortuj alfabetycznie Sortuj według wkładu UE Rozwiń wszystko Zwiń wszystko Centre National de la Recherche Scientifique Francja Wkład UE Brak danych Adres 54501 Vandoeuvre les Nancy Zobacz na mapie Koszt całkowity Brak danych Russian Academy of Sciences Rosja Wkład UE Brak danych Adres 184200 Apatity Zobacz na mapie Koszt całkowity Brak danych Russian Academy of Sciences Rosja Wkład UE Brak danych Adres 109017 Moscow Zobacz na mapie Koszt całkowity Brak danych
