Page 39 - Fundamentals of Physical Volcanology
P. 39

9780632054435_4_001.qxd  12/10/2007  12:17PM  Page 16





                    16  CHAPTER 1









                                                                    Eruption





                     Stage 4: Shallow transport & eruption       Ascent in dikes




                                                         Magma
                     Stage 3: Magma storage
                                                        Chamber




                                                                   Mush column







                     Stage 2: Transport                          Ascent in dikes




                                                                                          Lithosphere
                                                                 Diapiric ascent            Mantle











                     Stage 1: Melt production             Melt




                  Fig. 1.21 Four stages involved in the formation of a volcanic system. Stage 1: generation of magma by partial melting of rock.
                  Stage 2: movement of magma away from the source zone. Stage 3: storage of magma at depth. Stage 4: movement of magma
                  from storage to either erupt at the surface or form intrusions.
   34   35   36   37   38   39   40   41   42   43   44