Textural features and modes of ultramafic xenoliths from Sitke, Little Plain (Hungary)
Several upper mantle xenoliths from Sitke (Little Hungarian Plain) have been studied. This locality is one óf the important sites of the Early Tertiary volcanic activity in the Little Hungarian Plain. The Sitke's volcanic apparatus is consisting of a tuff-ring which is characterized by the occu...
Elmentve itt :
| Szerzők: | |
|---|---|
| Dokumentumtípus: | Cikk |
| Megjelent: |
University of Szeged, Department of Mineralogy, Geochemistry and Petrology
Szeged
1989
|
| Sorozat: | Acta mineralogica-petrographica
30 |
| Kulcsszavak: | Kőzettan, Ásványtan, Földtan |
| Tárgyszavak: | |
| Online Access: | http://acta.bibl.u-szeged.hu/24770 |
| Tartalmi kivonat: | Several upper mantle xenoliths from Sitke (Little Hungarian Plain) have been studied. This locality is one óf the important sites of the Early Tertiary volcanic activity in the Little Hungarian Plain. The Sitke's volcanic apparatus is consisting of a tuff-ring which is characterized by the occurence of fragments of olivine nephelinitic host rock. The tufaceous layers and fragments are often including nodules consisting generally of spinel lherzoliths, while dunitic and harzburgitic composition occur rarely. Two special xenoliths, one with a pure spinel-vein and another with considerable amphibole and clinopyroxene content, have been found, as well. Based on the textural investigation it can be proved that the porphyroclastic and equigranularic textures prevail and the transitional textures between them also exist. The two specific nodules are considered to be metasomatically originated in the upper mantle. |
|---|---|
| Terjedelem/Fizikai jellemzők: | 67-79 |
| ISSN: | 0365-8066 |