%0 Journal Article
%T Very low grade metamorphism of basic rocks: definition, mineral assemblages, and p每T conditions
%A Vladim赤r ˋern芍k
%A Marek Vˋaˋny
%J Acta Geologica Slovaca
%D 2010
%I Comenius University in Bratislava
%X The subgreenschist facies, representing a part of the fi eld of very low grade metamorphism, is characterized by pressures lower than those of the glaucophane-schist facies and temperatures lower than the low-temperature limit of the greenschist facies (up to ca. 300 ∼C and ca. 4每5 kbar). The subgreenschist facies involves three various metabasite subfacies (prehnite每pumpellyite facies, prehnite每actinolite facies, and pumpellyite每actinolite facies) defined by specific and diagnostic mineral assemblages of prehnite + pumpellyite, prehnite + actinolite, pumpellyite + actinolite, and also, according to certain authors, laumontite. The very low grade metamorphic rocks have been found over large areas of the Earth＊s continental and oceanic crust and it is expected that these rocks develop in a variety of tectonic settings. The Earth＊s crust, subduction zones, continental orogenic, arcs, and ridges are the most frequent geological environment where these transformations occur. In the Western Carpathians, the very low grade metamorphic rocks have been found in the Tatric, Hronic, and Gemeric superunits.
%K metamorphism
%K subgreenschist facies
%K p每T conditions
%K geodynamic settings
%U http://www.geopaleo.fns.uniba.sk/ageos/archive/2010_02/cernak_vdacny_2010.pdf