THE STRUCTURAL AND METALLOGENIC ANALYSIS OF THE
ZONE OF CENOZOIC AUTONOMOUS ACTIVATION
Petkovic M., Grubic A., Romié K., *
Almost in the middle of the Balkan peninsula, there is a relative-
ly narrow zone wath diffuse boundaries and of uneven width which
was known even earlier as the zone of Cenozoic autonomous tectonic-
magmatic activation (Jankovié, Petkovic, 1974,Grubic, 1974) Fig.l.
In general, this zone stretches from the Alps in the ESE direction,
purved in the central part of the Balkan peninsula in the NW-SE di-
rection later to return to a WNW-ESE direction. The activation zone
cuts across all earlier formed geotectonic units, mainly definiti-
vely consolidated at the end of the Styrian phase:the Alpine-Dina-
ric frontier zone, the Pannonian horsts, the Inner Dinarides, the
Vardar zone, the Serbian-Macedonian massif, the Struma zone and
touches the Rhodope Massif. The zone of Tertiary autonomous activa-
‘tion on the Balkan peninsula which was assumed earlier has been
confirmed by remote sensing and morphostructural analysis (Petkovic
1978, Kocneva, Romic, Petkovic 1978, Jankavic, Petkovic et al.1979).
The interpretation of satellitic imagery and morphostructural ana-
lysis have enabled us to understand the processes which preceded
the formation of the zone of Cenozoic activation. Apart from the
Pelagonian planetary structure (structure B on Fig.2), which repre-
sents a typical ringlike arch structure, there is an irregular but
still ringlike planetary structure caused by the depression of the
Pannonian basin (structure A): Although the central parts are depres:
sed in one case and elevated in the next, the effects of the process
of tension of their marginal parts were the same. In these proces--
ses, system of open fault structures were formed which served as
chanels of ascent of magma. Only when we realized that just these
marginal parts of the Pannonian and Pelagonian planétary structure
had served as a space for localization of the zone of Cenozoic .
autonomous activation did it become clear why the zone changes its
general WNW-ESE direction into the NW-SE direction.
XFaculty of mining and geology, Belgrade University,
Belgrade, Djusina 7.
