The tertiary intrusives north of the insubric line (Central Alps): Their uplift, erosion, deposition and reburial in the molasse foreland (Como; Northern Italy)

Giger, M.; Hurford, Anthony J.

doi:10.1016/1359-0189(90)90074-8

Cited by 27 publications

(47 citation statements)

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“…This early Oligocene event is also detected through a strong elevation of the axial Alpine orogen, which is suspected considering the increase in sediment budget in the northern and western forelands (Kuhlemann, 2000;Kempf & Pross, 2005;Morag et al 2008;Bernet and Tricart, 2010) leading to basins overfill and to the transition from flysch to molasse sedimentation. An other evidence is provided by the onset of coarse sedimentation in Lombardy and Piedmont, interpreted as a consequence of rapid unroofing in Western and Central Alps (Giger & Hurford, 1989;Carrapa et al, 2004). From early Oligocene onwards, one can observe a dramatic discrepancy between (i) the rapidly exhuming axial chain, now represented by the Internal Zones, with exhumation and canibalization of the Eocene flexural basin with its initial overload in the French foreland, and (ii) rapid burial affecting the previously exposed Eocene HP wedge in the Italian Piedmont (Bertotti et al, 2006).…”

Section: The Early Oligocene Orogenmentioning

confidence: 99%

Structural and sedimentary records of the Oligocene revolution in the Western Alpine arc

Dumont

Schwartz

Guillot

et al. 2012

Journal of Geodynamics

100

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Section: The Early Oligocene Orogenmentioning

confidence: 99%

Structural and sedimentary records of the Oligocene revolution in the Western Alpine arc

Dumont

Schwartz

Guillot

et al. 2012

Journal of Geodynamics

100

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“…This drainage allows the best comparison between bedrock ages and detrital age components, because it has the highest density of bedrock zircon FT ages of the examples presented in this paper (Hurford, 1986;Giger and Hurford, 1989;Michalski and Soom, 1990;Hunziker et al, 1992). The bedrock zircon FT ages show the largest range, between 8 and > 200 Ma, and the ages can be divided into groups of <10, 10-20, 20-50, and >100 Ma on the FT contour map (Fig.…”

Section: Detection Of Bedrock Cooling Agesmentioning

confidence: 99%

“…We constructed contour maps for zircon FT ages (Fig. 8) from published FT data (Hurford and Hunziker, 1985;Flisch, 1986;Hurford, 1986;Giger and Hurford, 1989;Michalski and Soom, 1990;Hunziker et al, 1992;Seward and Mancktelow, 1994;Bertotti et al, 1999;Fügenschuh et al, 1999;Bernet et al, 2001). Here we review the results for all three river-samples.…”

Section: Detection Of Bedrock Cooling Agesmentioning

confidence: 99%

Fundamentals of detrital zircon fission-track analysis for provenance and exhumation studies with examples from the European Alps

Bernet¹,

Brandon²,

Garver³

et al. 2004

Detrital Thermochronology - Provenance Analysis, Exhumation, and Landscape Evolution of Mountain Belts

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Fundamental aspects of detrital zircon fission-track analysis in provenance and exhumation studies include etching of fission-tracks in zircon, decomposition of grain-age distributions, detection of major bedrock age components, and reproducibility of results. In this study, we present new detrital zircon fission-track data of sediment samples from eight Italian rivers, draining the European Alps and previously published data from the Rhône delta in southeastern France. These samples are used to demonstrate that variable etching rates in detrital zircon, which have been shown elsewhere to necessitate a multi-etch procedure during sample preparation, are not a significant problem for zircons from the Alps. Etching response in zircon is a function of radiation damage, principally caused by α-decay. Spontaneous fission-track density can be used as a proxy for total radiation damage. We use spontaneous track density, fission-track cooling age, and uranium content to define a "window of countability" for detrital zircon. We also show that detrital zircon fission-track results are reproducible, by comparing results from modern sediments from the same river drainage. The results also compare well with the known distribution of bedrock cooling ages in each drainage. On a regional scale, our data illustrate that a few samples can provide an overview of the fission-track age pattern of a whole orogen, which is useful for exhumation and provenance studies.

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“…Gunzenhauser, 1985). Based on palynological studies, Giger and Hurford (1989) suggest a Middle Miocene age. Therefore, in accordance with Giger (1991), an age of around 15 Ma is taken for the Lucino Formation.…”

Section: Gonfolite Lombarda Groupmentioning

confidence: 99%

Paleogeography and catchment evolution in a mobile orogenic belt: the Central Alps in Oligo–Miocene times

et al. 2001

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In this study, we reconstruct the surface evolution of the Oligo -Miocene Central Alps using geochronological, geochemical and petrographical methods on the foreland basin sediments of both flanks of the mountain range. Our model is illustrated in four sketch maps of different time slices between mid-Oligocene to Middle Miocene times. For each time slice, we try to (1) give a palinspastic reconstruction of the Central Alps, based on the post-collisional lateral extrusion model, (2) show which tectonic units had become exposed to the surface due to exhumation processes in the Central Alps, (3) describe the thermochronologic evolution of lithological units formerly exposed but completely eroded today, (4) differentiate the catchment areas of the paleo-river systems which delivered debris to the foreland basins, and (5) describe the position of the main drainage divide relative to the exposed tectonic units. D

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The tertiary intrusives north of the insubric line (Central Alps): Their uplift, erosion, deposition and reburial in the molasse foreland (Como; Northern Italy)

Cited by 27 publications

References 0 publications

Structural and sedimentary records of the Oligocene revolution in the Western Alpine arc

Structural and sedimentary records of the Oligocene revolution in the Western Alpine arc

Fundamentals of detrital zircon fission-track analysis for provenance and exhumation studies with examples from the European Alps

Paleogeography and catchment evolution in a mobile orogenic belt: the Central Alps in Oligo–Miocene times

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