Cooling and exhumation of the Rieserferner Pluton (Eastern Alps, Italy/Austria)

Steenken, André; Siegesmund, Siegfried; Heinrichs, Till; Fügenschuh, Bernhard

doi:10.1007/s00531-002-0260-4

Cited by 38 publications

(26 citation statements)

References 48 publications

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“…Furthermore, ZFT ages gradually increase eastwards toward Cretaceous ages, indicating that the western part (of the DAV?) was possibly exhumed from deeper levels, consistent with the deeper intrusion depth of the Rensen with respect to the Rieserferner pluton (Borsi et al 1978b;Steenken et al 2002;Krenn et al 2003). These lateral differences can be explained by lateral variations in amount of shortening, which is highest at the Southalpine indentor tip (Borsi et al 1978b;Frisch et al 1998;Most 2003).…”

Section: The Thermal Tauern Windowmentioning

confidence: 62%

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Mapping of the post-collisional cooling history of the Eastern Alps

Lüth

Willingshofer

2008

Swiss J. Geosci.

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We present a database of geochronological data documenting the post-collisional cooling history of the Eastern Alps. This data is presented as (a) georeferenced isochrone maps based on Rb/Sr, K/Ar (biotite) and fission track (apatite, zircon) dating portraying cooling from upper greenschist/amphibolite facies metamorphism (500-600 °C) to 110 °C, and (b) as temperature maps documenting key times (25, 20, 15, 10 Ma) in the cooling history of the Eastern Alps. These cooling maps facilitate detecting of cooling patterns and cooling rates which give insight into the underlying processes governing rock exhumation and cooling on a regional scale.The compilation of available cooling-age data shows that the bulk of the Austroalpine units already cooled below 230 °C before the Paleocene. The onset of cooling of the Tauern Window (TW) was in the Oligocene-Early Miocene and was confined to the Penninic units, while in the Middle-to Late Miocene the surrounding Austroalpine units cooled together with the TW towards near surface conditions. High cooling rates (50 °C/Ma) within the TW are recorded for the temperature interval of 375-230 °C and occurred from Early Miocene in the east to Middle Miocene in the west. Fast cooling post-dates rapid, isothermal exhumation of the TW but was coeval with the climax of lateral extrusion tectonics. The cooling maps also portray the diachronous character of cooling within the TW (earlier in the east by ca. 5 Ma), which is recognized within all isotope systems considered in this study.Cooling in the western TW was controlled by activity along the Brenner normal fault as shown by gradually decreasing ages towards the Brenner Line. Cooling ages also decrease towards the E-W striking structural axis of the TW, indicating a thermal dome geometry. Both cooling trends and the timing of the highest cooling rates reveal a strong interplay between E-W extension and N-S orientated shortening during exhumation of the TW.

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Section: The Thermal Tauern Windowmentioning

confidence: 62%

“…North of the DAV age data within the AA units are only slightly older than those from the TW. In contrast, zircon Fission Track (FT) data to the south of the DAV exclusively record pre-Miocene cooling (Stöckhert et al 1999;Steenken et al 2002).…”

Section: Austroalpine Unitsmentioning

confidence: 99%

Mapping of the post-collisional cooling history of the Eastern Alps

Lüth

Willingshofer

2008

Swiss J. Geosci.

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“…9c, d). The same cooling pattern applies to the western part of the DAV, where ZFT ages record pre-Miocene cooling to the south and Miocene cooling to the north (Stöckhert et al, 1999;Steenken et al, 2002;Most, 2003;Luth and Willingshofer, 2008). If the Ragga-Teuchl fault is considered the eastern continuation of the DAV Schmid et al, 2013), it is likely that the crystalline blocks to the north and south of it exhibit similar thermal histories.…”

Section: Interpretation and Discussionmentioning

confidence: 82%

“…Input parameters: central AFT age with 1σ error; track length distributions, Dpar values as kinetic parameters. For starting conditions (black box) we choose a temperature range between 750 and 950 °C as magma emplacement temperature (Watson and Harrison, 1983;Bellieni et al, 1984;Steenken et al, 2002). The red boxes are the temperature range for ZFT ages (ZFT: 18.5±1.0 Ma) and the temperature range for AFT ages (AFT: 15.5±0.8 Ma).…”

Section: Interpretation and Discussionmentioning

confidence: 99%

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Cretaceous to Miocene cooling of Austroalpine units southeast of the Tauern Window (Eastern Alps) constrained by multi-system thermochronometry

Woelfler¹,

Dekant²,

Frisch³

et al. 2015

AJES

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The cooling history of the Polinik and Kreuzeck Blocks of the Austroalpine units to the southeast of the Tauern Window are reexamined in the light of new mica Ar/Ar-, zircon fission track and apatite fission track data. Our new data demonstrate that the two blocks experienced a significantly different thermal evolution during Mesozoic-Cenozoic times: The Polinik Block revealed Late Cretaceous Ar/Ar ages (87.2-81.6 Ma), which reflect cooling subsequent to the thermal peak of Eo-Alpine metamorphism. The

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Exhumation mechanisms of the Tauern Window (Eastern Alps) inferred from apatite and zircon fission track thermochronology

et al. 2017

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Orogen‐parallel extension and orogen‐perpendicular shortening accommodated by folding acted at the same time to exhume the Tauern Window. In order to investigate the relative contribution of upright folding and erosion and of extensional denudation for exhumation, we provide compilations in map view of previous and new zircon and apatite fission track ages. These age maps show that isoage contour lines are subparallel to the axial planes of large‐scale, upright folds. On age versus distance diagrams, along a profile perpendicular to the dome axis, all thermochronometers show bell‐shaped curves with younger ages in the hinge area of the dome and age differences between different chronometers decreasing from the limbs to the hinge area. All these observations suggest that folding synchronous with erosion was largely responsible for exhumation of the Tauern Window. The younger ages and the higher fold amplitudes of the western subdome compared to the eastern one are corroborated by the results of inversion of cooling ages that show higher exhumation rates in the west. These reflect one and the same shortening and folding event that affected the entire Tauern Dome synchronously, but at higher rates than that in the western subdome. Only during Pliocene time were exhumation rates slightly higher along the normal faults bordering the window; hence, extensional unroofing may have dominated exhumation in the Pliocene. The northward displacement of the Dolomites Indenter was associated to a clockwise rotation, which caused increased amounts of shortening westward, hence higher uplift and exhumation rates in the western subdome.

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Cooling and exhumation of the Rieserferner Pluton (Eastern Alps, Italy/Austria)

Cited by 38 publications

References 48 publications

Mapping of the post-collisional cooling history of the Eastern Alps

Mapping of the post-collisional cooling history of the Eastern Alps

Cretaceous to Miocene cooling of Austroalpine units southeast of the Tauern Window (Eastern Alps) constrained by multi-system thermochronometry

Exhumation mechanisms of the Tauern Window (Eastern Alps) inferred from apatite and zircon fission track thermochronology

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