Rubidium-Strontium-Altersbestimmungen an Biotit-Muskowit-Granitgneisen (Typus Augen- und Flasergneise) aus dem n�rdlichen Gro�venedigerbereich (Hohe Tauern)

Jäger, E.; Franz, Karl; Schmidegg, O.

doi:10.1007/bf01081563

Cited by 23 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Upper Freshwater Molasse sediments, Bernet et al (2009) found zircon fission track ages with lag-times <10 Ma. Data from (a): Bertrand et al, 2017;Blanckenburg et al, 1989;Borsi, 1978;Cliff et al, 1985;Dunkl et al, 2003;Favaro et al, 2015;Foeken et al, 2007;Fügenschuh et al, 1997;Grundmann & Morteani, 1985;Hawkesworth, 1976;Inger & Cliff, 1994;Jäger et al, 1969;Lambert, 1970;Most, 2003;Oxburgh et al, 1966;Raith et al, 1978;Reddy et al, 1993;Roddick et al, 1980;Satir, 1976;Satir & Morteani, 1982;Scharf, Handy, Favaro, et al, 2013;Staufenberg, 1987. Closure temperatures: Rb-Sr White Mica: 500 ± 50°C (Purdy & Jäger, 1976); K-Ar White Mica: 425 ± 50°C (Blanckenburg et al, 1989); Ar-Ar White Mica: 387.5 ± 37.5°C (Reiners & Brandon, 2006); K-Ar Biotite: 320 ± 40°C (Del Moro et al, 1982); Rb-Sr Biotite: 300 ± 50°C (Jäger, 1967); Zircon Fission Track: 230 ± 20°C (Reiners & Brandon, 2006); Apatite Fission Track: 120 ± 20°C (Reiners & Brandon, 2006) EAGE HÜLSCHER et al intrusions along the Periadriatic Line were part of the paleo-Inn drainage network (Brügel et al, 2000;Sharman et al, 2018). However, these interpretations might be partly biased by the high number of apatites of IM (64%) and LM (76%) affinity which failed the U-Pb age uncertainty threshold filter.…”

Section: Discussionmentioning

confidence: 99%

Detrital apatite geochemistry and thermochronology from the Oligocene/Miocene Alpine foreland record the early exhumation of the Tauern Window

et al. 2021

View full text Add to dashboard Cite

The early exhumation history of the Tauern Window in the European Eastern Alps and its surface expression is poorly dated and quantified, partly because thermochronological and provenance information are sparse from the Upper Austrian Northern Alpine Foreland Basin. For the first time, we combine a single-grain double-dating approach (Apatite Fission Track and U-Pb dating) with trace-element geochemistry analysis on the same apatites to reconstruct the provenance and exhumation history of the late Oligocene/early Miocene Eastern Alps. The results from 22 samples from the Chattian to Burdigalian sedimentary infill of the Upper Austrian Northern Alpine Foreland Basin were integrated with a 3D seismic-reflection data set and published stratigraphic reports.Our highly discriminative data set indicates an increasing proportion of apatites (from 6% to 23%) with Sr/Y values <0.1 up-section and an increasing amount of apatites (from 24% to 38%) containing >1,000 ppm light rare-earth elements from Chattian to Burdigalian time. The number of U-Pb ages with acceptable uncertainties increases from 40% to 59% up-section, with mostly late Variscan/ Permian ages, while an increasing number of grains (10%-27%) have Eocene or younger apatite fission track cooling ages. The changes in the apatite traceelement geochemistry and U-Pb data mirror increased sediment input from an ≥upper amphibolite-facies metamorphic source of late Variscan/Permian age -probably the Ötztal-Bundschuh nappe system -accompanied by increasing exhumation rates indicated by decreasing apatite fission track lag times. We attribute these changes to the surface response to upright folding and doming in the Penninic units of the future Tauern Window starting at 29-27 Ma. This early period of exhumation (0.3-0.6 mm/a) is triggered by early Adriatic indentation along the Giudicarie Fault System. EAGE HÜLSCHER et al. K E Y W O R D S detrital apatite fission track analysis, detrital apatite trace-element geochemistry, Molasse Basin, Northern Alpine Foreland Basin, Tauern Window Highlights• Provenance and low-T thermochronology approach applied together on detrital apatites.• Apatites analyzed for U-Pb ages, AFT ages, and trace-element geochemistry.• Oligocene Tauern Window exhumation for the first time dated and quantified from the detrital record.• Slow (0.3-0.6 mm/a), early (29-27 Ma) Tauern exhumation accelerates after 21 Ma. F I G U R E 2 Simplified geological map of the Upper Austrian NAFB showing the locations of the sampled drill cores and of the three wells with published stratigraphic information (Hülscher et al., 2019). The pink outline shows the extent of the 3D-seismic cube provided by the RAG. The inset shows a root mean square amplitude map of the seismic-reflection surface of the Base Hall Unconformity outlining the axial channel, the extensive overbank deposits on the northern basin margin and the slope fans on the southern tectonically active margin.Note that the channel meanders migrated through the basin over time (Figure 3). See Table S2 for coor...

show abstract

Section: Discussionmentioning

confidence: 99%

Detrital apatite geochemistry and thermochronology from the Oligocene/Miocene Alpine foreland record the early exhumation of the Tauern Window

et al. 2021

View full text Add to dashboard Cite

show abstract

“…In Fig. 1 we compare the available age data for pre-Alpine intrusion ages (Jager et al, 1969;Besang et al, 1968;Cliff, 1981), pre-Alpine metamorphic ages (see Grundmann, 1989) and depositional ages (Raith and Holl, 1988) in the central Tauern area. It is obvious that between the northern and the southern part there is a large stratigraphic difference.…”

Section: Discussionmentioning

confidence: 99%

Carbo‐Permian pteridophyll leaf fragments from an amphibolite facies basement, Tauern Window, Austria

Franz

Mosbruggr²,

Menge

1991

Terra Nova

View full text Add to dashboard Cite

Graphitic schists from the Pennine Basement, Tauern Window, Austria, contain fragments of pteridophyll leaves. They are preserved, despite the overall strong deformation and metamorphism at amphibolite facies conditions (-525"C, 750+100 MPa), due to a particular strain path with volume loss by pressure solution. They were determined as cf. CuEZipferidiurn sp. indicating a Permo-Carboniferous age. This depositional age is similar to radiometric age data obtained for the intrusion of nearby metagranitoids, indicating either tectonic contacts between the metagranitoids and the graphite schists, or a very active and rapidly changing tectonic regime during the Hercynian event.

show abstract

“…These data are 40 K/ 39 Ar ages of white mica and biotites ( Brewer, 1970 , Brewer and Jenkins, 1969 , Cliff et al, 1985 , Hoke, 1990 , Lambert, 1970 , Oxburgh et al, 1966 , Waters, 1976 ), 40 Ar/ 39 Ar of white mica and biotites ( Dekant, 2009 ) and 87 Rb/ 86 Sr data from biotites and white mica ( Cliff et al, 1985 , Hawkesworth, 1976 , Reddy et al, 1993 ). For the closure temperature ranges of these thermochronometers we follow these authors: 40 K/ 39 Ar white mica ~ 430–375 °C ( Hames and Bowering, 1994 , Kirschner et al, 1996 ); 40 K/ 39 Ar biotite ~ 350–250 °C ( Faure and Mensing, 1986 ); 40 Ar/ 39 Ar white mica ~ 450–350 °C ( Hames and Bowering, 1994 , Harrison et al, 2009 , Kirschner et al, 1996 , Lips et al, 1998 ); 40 Ar/ 39 Ar biotite 400–300 °C ( Grove and Harrison, 1996 , Villa, 1998 ); 87 Rb/ 86 Sr white mica ~ 550–450 °C ( Jäger et al, 1969 , Purdy and Jäger, 1976 ); 87 Rb/ 86 Sr biotite ~ 350–250 °C ( Del Moro et al, 1982 , Jäger et al, 1969 ). The authors are aware of the fact that the closure temperature concept of distinct thermochronometers is still debated (e.g.…”

Section: Methodsmentioning

confidence: 99%

Low temperature thermochronology in the Eastern Alps: Implications for structural and topographic evolution

et al. 2012

View full text Add to dashboard Cite

According to new apatite fission track, zircon- and apatite (U–Th)/He data, we constrain the near-surface history of the southeastern Tauern Window and adjacent Austrolapine units. The multi-system thermochronological data demonstrate that age-elevation correlations may lead to false implications about exhumation and cooling in the upper crust. We suggest that isothermal warping in the Penninic units that are in the position of a footwall, is due to uplift, erosion and the buildup of topography. Additionally we propose that exhumation rates in the Penninic units did not increase during the Middle Miocene, thus during the time of lateral extrusion. In contrast, exhumation rates of the Austroalpine hangingwall did increase from the Paleogene to the Neogene and the isotherms in this unit were not warped. The new zircon (U–Th)/He ages as well as zircon fission track ages from the literature document a Middle Miocene exhumation pulse which correlates with a period of enhanced sediment accumulation during that time. However, enhanced sedimentation- and exhumation rates at the Miocene/Pliocene boundary, as observed in the Western- and Central Alps, cannot be observed in the Eastern Alps. This contradicts a climatic trigger for surface uplift, and makes a tectonic trigger and/or deep-seated mechanism more obvious to explain surface uplift in the Eastern Alps.In combination with already published geochronological ages, our new data demonstrate Oligocene to Late Miocene fault activity along the Möll valley fault that constitutes a major shear zone in the Eastern Alps. In this context we suggest a geometrical and temporal relationship of the Katschberg-, Polinik–Möll valley- and Mur–Mürz faults that define the extruding wedge in the eastern part of the Eastern Alps. Equal deformation- and fission track cooling ages along the Katschberg–Brenner- and Simplon normal faults demonstrate overall Middle Miocene extension in the whole alpine arc.

show abstract

Rubidium-Strontium-Altersbestimmungen an Biotit-Muskowit-Granitgneisen (Typus Augen- und Flasergneise) aus dem n�rdlichen Gro�venedigerbereich (Hohe Tauern)

Cited by 23 publications

References 3 publications

Detrital apatite geochemistry and thermochronology from the Oligocene/Miocene Alpine foreland record the early exhumation of the Tauern Window

Detrital apatite geochemistry and thermochronology from the Oligocene/Miocene Alpine foreland record the early exhumation of the Tauern Window

Carbo‐Permian pteridophyll leaf fragments from an amphibolite facies basement, Tauern Window, Austria

Low temperature thermochronology in the Eastern Alps: Implications for structural and topographic evolution

Contact Info

Product

Resources

About