Publication details
HT rocks from the Visean conglomerates - further evidence for an external heat source in the internal zone of European Variscides.
| Authors | |
|---|---|
| Year of publication | 2002 |
| Type | Article in Proceedings |
| Conference | 18th IMA Abstracts |
| MU Faculty or unit | |
| Citation | |
| Field | Geology and mineralogy |
| Keywords | Upper Visean; conglomerates; granulites; volcanics; high pressure; U-Pb dating; zircon; high temperature; volcanic arc; exhumation; exhumation rate |
| Description | Granulites found in clasts in Upper Visean conglomerates of the Drahany Uplands feature a strong overprint at medium pressure and high temperature. Geothermobarometry, mineral zoning and reaction textures are consistent with two-stage exhumation, characterized by first isothermal decompression and second near-to-isobaric cooling. Zircon, monazite and rutile U-Pb data are consistent with the two-stage exhumation, two, rapid consistent with the isothermal period, and slower corresponding to the isobaric stage. Possible sources of heat responsible for the medium-pressure younger overprint are discussed. chronological dating of these granulites |
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