A Devonian-early Carboniferous succession comprising thick clastic and
carbonate sediments with interbedded volcanics was examined along the southern
margin of the Donbas Foldbelt, Ukraine. Following initial rifting
and subsidence, a continental (fluvial, lacustrine) succession was established.
This first phase of syn-rift activity (Eifelian) was accompanied by the
intrusion of basalts. In late Givetian-early Famennian times half
graben development was pronounced and a series of E-W-trending half-grabens
were formed. Coeval volcanic activity was marked. Subsequent
basin subsidence led to the establishment of a broad carbonate platform
across the region (Upper Famennian-Tournaisian-early Visean). Magma
chamber swelling led to uplift, partial exposure and karstification of
the platform. This was accompanied by trachyte intrusion and extrusion.
Subsidence and related sea level rise led to the deposition of a chert-rich
unit across the region. Renewed tectonic activity along the main
basin-bounding fault resulted in the deformation of this unit.
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