Search Results - (Author, Cooperation:M. Wagreich)

2016-01-09

American Association for the Advancement of Science (AAAS)

0036-8075

1095-9203

Biology

Chemistry and Pharmacology

Computer Science

Medicine

Natural Sciences in General

Physics

Aluminum/analysis ; *Biota ; Carbon Cycle ; Climate ; Construction Materials/analysis ; *Earth (Planet) ; Fossil Fuels/adverse effects ; Geologic Sediments/*chemistry ; *Human Activities ; Humans ; Ice/analysis ; Introduced Species ; Plastics/analysis ; Radioactive Fallout/analysis ; Radioisotopes/analysis

1365-3121

Blackwell Publishing Journal Backfiles 1879-2005

Geosciences

Detrital blue amphiboles detected in flysch sandstones of the Hellenides of mainland Greece give important information on uplift and exhumation history of blueschist terrains. The occurrence of these HP/LT minerals in the terminal flysch of the Pindos zone as well as in the Othrys flysch of the Subpelagonian zone from late Maastrichtian/ Palaeocene time onwards proves a Pre-Tertiary (Eohellenic) stage of blueschist formation. Detrital blue amphiboles from flysch sequences of the Ionian zone indicate a further pulse of uplift of high-pressure rocks during the Palaeocene/Eocene. Blueschist rocks of this latter time range are radiometrically well documented in the Hellenides.

Electronic Resource

1437-3262

Key wordsMiocene ; Eastern Alps ; Basin analysis ; Thermal history ; Flower structure

Springer Online Journal Archives 1860-2000

Geosciences

Abstract The evolution of the early/middle Miocene Fohnsdorf Basin has been studied using borehole data, reflection seismic lines, and vitrinite reflectance. The basin is located along the sinistral Mur-Mürz fault system and probably formed as an asymmetric pull-apart basin, which was subsequently modified by halfgraben tectonics, as a consequence of eastward lateral extrusion. Sedimentation started with the deposition of fluvio-deltaic sediments. Thick coal accumulated in the northwestern basin. Thereafter subsidence rates increased dramatically with the formation of a lake several hundred meters deep. The lake was filled mainly from the north with more than 1500 m of sediments showing a coarsening-upward trend due to southward prograding deltaic lobes. A sequence of more than 1000 m of boulder gravels (Blockschotter) in the southeastern part of the basin are interpreted as the upper part of a coarse-grained fan delta succession, which accumulated along a normal fault along the southern basin margin. Fan deltas reached the central basin only during the early stages of sedimentation and during the late stages of basin formation. Miocene heat flow was approximately 65–70 mW/m2, which is significantly lower than in other basins along the Mur-Mürz fault system. The present-day southwestern basin margin is a recent feature, which is related to transpression along the dextral Pöls-Lavanttal fault system. It is formed by reverse faults constituting the northeastern part of a flower structure. Miocene sediments in the Feeberg valley are preserved along its southwestern part. Uplift of the central part of the flower structure was at least 2.4 km. North–south compression resulted in the deformation of the basin fill, uplift of the E/W-trending basement ridge separating the Fohnsdorf and Seckau basins, and in the erosion of 1750 m of sediments along the northern basin margin.

Electronic Resource