Gutenberg Open


Titelanzeige

Personen: Walte, Nicolas P. (Autor) 
Bons, Paul D. (Autor) 
Passchier, Cornelis Willem (Autor) 
  
Titel: Deformation of melt-bearing systems—insight from in situ grain-scale analogue experiments
  
Quelle: Journal of structural geology. Bd. 27. H. 9. S. 1666 - 1679
Erscheinungsjahr:    2005
ISBN / ISSN: 0191-8141
URL der Originalveröffentlichung doi:10.1016/j.jsg.2005.05.006
  
Dokumentart:
Zeitschriftenaufsatz Zeitschriftenaufsatz
Sprache: Englisch
Open Access:
Person der Universität:    Passchier, Cornelis Willem  In UnivIS suchen 
Einrichtung: Institut für Geowissenschaften
DDC-Sachgruppe:    Geowissenschaften
DFG-Fachgebiet: Geologie und Paläontologie
ID: 16342  Universitätsbibliothek Mainz
Hinweis:
Informationen zu den Nutzungsrechten unserer Inhalte Informationen zu den Nutzungsrechten unserer Inhalte
Abstract: The deformation behaviour of partially molten rocks was investigated using in situ analogue experiments with norcamphor+ethanol, as well as partially molten KNO3+LiNO3. Three general deformation regimes could be distinguished during bulk pure shear deformation. In regime I, above ca. 8-10 vol.% liquid (melt) fraction ([phi]bulk), deformation is by compaction, distributed granular flow, and grain boundary sliding (GBS). At [phi]bulk<8-10 vol.% (regime II), GBS localizes in conjugate shear zones. Liquid segregation is inefficient or even reversed as the dilatant shear zones draw in melt to locally exceed the 8-10 vol.% threshold. At even lower [phi]bulk (regime III), grains form a coherent framework that deforms by grain boundary migration accommodated dislocation creep, associated with efficient segregation of remaining liquid. The transition liquid fraction between regimes I and II ([phi]LT) depends mainly on the grain geometry and is therefore comparable in both analogue systems. The transition liquid fraction between regimes II and III ([phi]GBS-L) varies between 4-7 vol.% for norcamphor-ethanol and ca. 1 vol.% for KNO3+LiNO3 and depends on system specific parameters. Regime II behaviour in our experiments can explain the frequently observed small melt-bearing shear zones in partially molten rocks and in HT experiments.
   
  
Verfügbarkeit prüfen:    Rechercheportal Mainz: 0191-8141
  KatalogPortal Mainz (inklusive FB 06): 0191-8141
  Elektronische Zeitschriftenbibliothek (EZB): 0191-8141
 


Im   
Impressum