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Contenido archivado el 2022-12-23

Ore-bearing granites of Eurasia: anatomy and magmatic-hydrothermal mechanisms of ore deposition

Objetivo



Silicic, in large part granite, magmatism is the most important intracontinental fractionation mechanism. Its products, felsic igneous rocks, are associated with a wide spectrum of ore deposits which are vital to current and future technologies. This project will focus on the widespread Hercynian collisional volcano-plutonic silicic systems in Europe and Asia. These rare metal granites of the European-Asian continent belong to the different age groups of Mesozoic, Palaeozoic and Proterozoic. Provinces of other ages, however, together with geotectonic and geographic settings of granite belts will not be excluded as the project aims at a general understanding of silicic magmatism and its associated hydrothermal evolution. The pattern of individual study areas is expected to develop during the first two years of the three year project as a scientific network between research teams from the NIS and western Europe. The project will focus on the anatomy and magmatic-hydrothermal evolution of selected ore-bearing granite systems in Eurasia. The comparison and correlation of a variety of different geological systems will help to constrain a set of recurrent petrogenetic features and possibly develop models which describe the magmatic, magmatic-hydrothermal and hydrothermal high-to-low temperature evolution of felsic igneous systems. An important point is the definition of those processes which control the formation of these ore deposits.

There are several advanced models available which describe granite-related ore formation. These models are usually derived from a restricted dataset, however, and are not fully compatible with each other. The project will define a general model, by using both Eurasian knowledge and the information on the large data base. Progress reports will be published as symposium proceedings and multi-author books on granite-related ore formation.

The focus of the first phase of the three year project will be the field meeting on rare-metal granites and associated mineralisation of central Kazakhstan in Karaganda. Field work will cover transect studies of several large rare-metal and copper porphyry mineral systems in south-east central Kazakhstan which are currently studied by researchers from Kazakhstan and Russia. These study groups are part of the network as outlined in this project. The field meeting will provide the opportunity to exchange ideas, data and to collect additional material for laboratory work in the NIS and INTAS member states. Additional field work will be carried out on rare-metal granites in Transbaikalia and in the Ukrainian Shield, using researchers from Siberia and Ukraine and will focus on the production of datasets on Proterozoic granites. Correlation and synthesis of all data will be the overall aim of the current project.

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Coordinador

Technische Universität Clausthal
Aportación de la UE
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Dirección
Adolph-Roemer-Straße 2a
38678 Clausthal - Zellerfeld
Alemania

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