TITLE:
Volatiles (S-CO2-H2O-Cl-F) Behavior during the AD 1944 Eruption
AUTHORS:
Angelo Paone
KEYWORDS:
AD 1944 Eruption, Vesuvius, Degassing, Volatiles, Differentiation, Solubility
JOURNAL NAME:
International Journal of Geosciences,
Vol.6 No.3,
March
20,
2015
ABSTRACT: The AD 1944 is the last
vulcanian-effusive eruption of Vesuvius volcano. I have reviewed most of the
major and volatile elements in order to better understand the eruptive dynamic
of this hazardous volcano. These volcanic products were basically formed by at
least two main petrogenetic mechanisms: 1) mixing, 2) crystal fractionation.
Crystal fractionation plays a major role in the evolution of the volcanic
products of the AD 1944 eruption. According to the major elements data, several
fractionation lines can be employed. Volatile data are analyzed in sequence.
Indeed, the volatile data allow an insight into the exsolution and degassing
processes occur during the growth and eruption of the AD 1944 eruption. Some
inferences are also made on the exsolution and degassing depth. The volatile
data illustrate a sequential order of exsolution for the AD 1944 eruption: Cl-H2O-CO2-S
and finally as volatile phase degassed fluorine. The eruption has not
interacted with external water. An early exsolution of Cl in Cl-rich magmas is
also confirmed by experimental and geological studies (3 - 4 Kbars) coinciding
with the deep magma reservoir.