Chlorit-Hornblende-Felse des Bergsträßer Odenwaldes und ihre Phasenpetrologie |
| |
Authors: | Wolfgang Schubert |
| |
Institution: | 1. Mineralogisches Institut der Universit?t, Pleichertorstr. 34, 87 Würzburg
|
| |
Abstract: | Ultrabasic metamorphic rocks with typical mineral assemblage of cummingtonitic hornblende+Mg-chlorite+talc (described byMatthes u.Okrusch, 1965, and called “hösbachit”) were found for the first time in Odenwald/Germany. Three steps of metamorphic development can be described: the primary magmatic ultrabasic rock consisted of (1) orthopyroxene (bronzite), clinopyroxene (diallage), poikilitic olivine, and some hornblende. This is indicated by textural relicts, structural and geochemical investigations. A regional metamorphic process under conditions of the staurolite-almandine-subfacies ofWinkler’s andTurner andVerhoogen’s almandine-amphibolite facies transformed this assemblage to (2): cummingtonitic hornblende I+Mg-chlorite I (clinochlore)+talc. The third step followed under more diaphthoritic conditions and brought mineral assemblage (3): tremolitic hornblende II+Mg-chlorite II (pennine)+talc. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|