Fruska Gora Mountain is a large scale antiform located at the southeast part
of the Pannonian Basin between the Danube and Sava Rivers. It is built of
Paleozoic and Mesozoic rocks with Neogene sediments on all sides and at the
flanks. The Paleozoic and Mesozoic rocks are largely metamorphosed (age of
the metamorphism is early Cretaceous) and they are intruded by
Eocene/Oligocene latites and rhyodacites and Badenian basaltic
trachyandesite. On Fruska Gora two major structural units are observed, the
northern and southern structural units which are divided by the Srem
dislocation striking NNW-SSE. The Tertiary magmatic rocks located on both
sides of this dislocation were the subject of paleomagnetic analysis.
Tectonically meaningful paleomagnetic directions are obtained from latites
and rhyodacites, while basaltic trachyandesite has a secondary remanent
magnetization. The obtained overall-mean paleomagnetic direction, after
applying the correction for the general tilt of the Lower Miocene sediments,
suggests a clockwise rotation (D = 210?, I = -45?, k = 21, ?95 = 14?) of 30?
with respect to the present North of blocks on both sides of the Srem
dislocation. The fact that close to the end of Miocene-Early Pliocene Fruska
Gora rotated in a counterclockwise direction for 40? with respect to the
present North means that all of Fruska Gora rotated in a clockwise direction
for 70? with the respect to the present North in a short time after the
intrusion of Eocene/Oligocene magmatic rocks and before Middle Miocene.
Paleomagnetism and Post-Middle Miocene Counter-Clockwise Rotation of Tanegashima Island off Kyushu, Japan.