ISSN:
1432-0967
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract A comparative study of xenoliths from lavas and granitic rocks of central France indicates that: 1. The evolution of the xenoliths is essentially the same in intermediate to acid lavas as in granites. The major factor in this evolution is the assimilation by the host magmas of the quartzofeldspathic components of the xenoliths, which then become Al, Fe, Mg-rich restites. 2. Liquid immiscibility between melted xenoliths and host magmas can only be postulated for acid xenoliths in alkali basalts. 3. The basic microgranular xenoliths in some granites do not show important compositional gaps with their host rocks, though they are regularly more basic. They can be considered as early segregations (cumulates).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00403425
