Research Article| March 01, 1970 Metamorphic Processes in the Bohemian Massif VLADIMÍR ŠKVOR VLADIMÍR ŠKVOR Geological Survey, Prague, Czechoslovakia Search for other works by this author on: GSW Google Scholar GSA Bulletin (1970) 81 (3): 955–960. https://doi.org/10.1130/0016-7606(1970)81[955:MPITBM]2.0.CO;2 Article history received: 11 Jul 1969 rev-recd: 02 Sep 1969 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation VLADIMÍR ŠKVOR; Metamorphic Processes in the Bohemian Massif. GSA Bulletin 1970;; 81 (3): 955–960. doi: https://doi.org/10.1130/0016-7606(1970)81[955:MPITBM]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The relationship of the metamorphosed and non-metamorphosed areas in the central part of the Bohemian massif can hardly be explained by the concept of repeated geosynclinal development as many geologists have assumed.The metamorphic heat front generally depends on energy released from the deep source, on the duration of this activity, and on the mode of its supply to upper levels. In this respect the weakened zones of the deep-seated faults are of the highest importance.A linear block of metamorphic rocks may be developed when a high rise in temperature is controlled by a deep-seated fault. If two or more closely spaced faults reach down to a subcrustal depth and can transport the heat front, it is possible that their weakened metamorphic zones may coalesce and produce a block of crystalline rocks of polygonal outline. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
The ancient Moldanubian structure of the Bohemian Massif probably was poor in ore deposits. The upper Proterozoic and Paleozoic geosynclinal development and regional metamorphism effected a new redistribution and supply of material and are believed to be metallogically of the highest importance. A model of a process that might enrich some zones and areas in ore-forming constituents is given.Units with characteristic structure and development in the Bohemian Massif contain specific types of mineralization. These types of endogenous, mainly hydrothermal mineralization have been defined as isogenous mineral associations. Two main and different groups of Variscan intrusives, each with a different source and each with related isogenous mineral associations, form two principal petrometallogenic groups.The main accumulations of the endogenous mineralization of both petrometallogenic groups are distributed along the weakened zones of the margins of the former geosynclinal basins. The ore manifestations follow the deep-seated faults and are dispersed into the surrounding wall rocks. The relatively stable blocks are mostly barren of ores. The geological development and metallogeny of other Precambrian massifs in central and western Europe might be in many respects similar.
