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  • 1
    Online Resource
    Online Resource
    Timing, kinematics and cause of Aegean extension: a scenario based on a comparison with simple analogue experiments
    Elsevier BV ; 1999
    In:  Tectonophysics Vol. 315, No. 1-4 ( 1999-12), p. 31-72
    Details
    In: Tectonophysics, Elsevier BV, Vol. 315, No. 1-4 ( 1999-12), p. 31-72
    Type of Medium: Online Resource
    ISSN: 0040-1951
    URL: Article
    DOI: 10.1016/S0040-1951(99)00281-4
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1999
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  • 2
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    Using gemorphological markers to discriminate Neogene tectonic activity in the Precordillera of North Chilean forearc (24–25°S)
    Elsevier BV ; 2005
    In:  Tectonophysics Vol. 411, No. 1-4 ( 2005-12), p. 41-55
    Details
    In: Tectonophysics, Elsevier BV, Vol. 411, No. 1-4 ( 2005-12), p. 41-55
    Type of Medium: Online Resource
    ISSN: 0040-1951
    URL: Article
    DOI: 10.1016/j.tecto.2005.08.017
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2005
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  • 3
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    Mantle dynamics, uplift of the Tibetan Plateau, and the Indian Monsoon
    American Geophysical Union (AGU) ; 1993
    In:  Reviews of Geophysics Vol. 31, No. 4 ( 1993-11), p. 357-396
    Details
    In: Reviews of Geophysics, American Geophysical Union (AGU), Vol. 31, No. 4 ( 1993-11), p. 357-396
    Abstract: Convective removal of lower lithosphere beneath the Tibetan Plateau can account for a rapid increase in the mean elevation of the Tibetan Plateau of 1000 m or more in a few million years. Such uplift seems to be required by abrupt tectonic and environmental changes in Asia and the Indian Ocean in late Cenozoic time. The composition of basaltic volcanism in northern Tibet, which apparently began at about 13 Ma, implies melting of lithosphere, not asthenosphere. The most plausible mechanism for rapid heat transfer to the midlithosphere is by convective removal of deeper lithosphere and its replacement by hotter asthenosphere. The initiation of normal faulting in Tibet at about 8 (± 3) Ma suggests that the plateau underwent an appreciable increase in elevation at that time. An increase due solely to the isostatic response to crustal thickening caused by India's penetration into Eurasia should have been slow and could not have triggered normal faulting. Another process, such as removal of relatively cold, dense lower lithosphere, must have caused a supplemental uplift of the surface. Folding and faulting of the Indo‐Australian plate south of India, the most prominent oceanic intraplate deformation on Earth, began between about 7.5 and 8 Ma and indicates an increased north‐south compressional stress within the Indo‐Australian plate. A Tibetan uplift of only 1000 m, if the result of removal of lower lithosphere, should have increased the compressional stress that the plateau applies to India and that resists India's northward movement, from an amount too small to fold oceanic lithosphere, to one sufficient to do so. The climate of the equatorial Indian Ocean and southern Asia changed at about 6–9 Ma: monsoonal winds apparently strengthened, northern Pakistan became more arid, but weathering of rock in the eastern Himalaya apparently increased. Because of its high altitude and lateral extent, the Tibetan Plateau provides a heat source at midlatitudes that should oppose classical (symmetric) Hadley circulation between the equator and temperate latitudes and that should help to drive an essentially opposite circulation characteristic of summer monsoons. For the simple case of axisymmetric heating (no dependence on longitude) of an atmosphere without dissipation, theoretical analyses by Hou, Lindzen, and Plumb show that an axisymmetric heat source displaced from the equator can drive a much stronger meridianal (monsoonlike) circulation than such a source centered on the equator, but only if heating exceeds a threshold whose level increases with the latitude of the heat source. Because heating of the atmosphere over Tibet should increase monotonically with elevation of the plateau, a modest uplift (1000–2500 m) of Tibet, already of substantial extent and height, might have been sufficient to exceed a threshold necessary for a strong monsoon. The virtual simultaneity of these phenomena suggests that uplift was rapid: approximately 1000 m to 2500 m in a few million years. Moreover, nearly simultaneously with the late Miocene strengthening of the monsoon, the calcite compensation depth in the oceans dropped, plants using the relatively efficient C4 pathway for photosynthesis evolved rapidly, and atmospheric CO 2 seems to have decreased, suggesting causal relationships and positive feedbacks among these phenomena. Both a supplemental uplift of the Himalaya, the southern edge of Tibet, and a strengthened monsoon may have accelerated erosion and weathering of silicate rock in the Himalaya that, in turn, enhanced extraction of CO 2 from the atmosphere. Thus these correlations offer some support for links between plateau uplift, a downdrawing of CO 2 from the atmosphere, and global climate change, as proposed by Raymo, Ruddiman, and Froehlich. Mantle dynamics beneath mountain belts not only may profoundly affect tectonic processes near and far from the belts, but might also play an important role in altering regional and global climates.
    Type of Medium: Online Resource
    ISSN: 8755-1209 , 1944-9208
    URL: Article
    DOI: 10.1029/93RG02030
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1993
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  • 4
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    From subduction to collision: Control of deep processes on the evolution of convergent plate boundary : TRANSITION SUBDUCTION-COLLISION
    American Geophysical Union (AGU) ; 2003
    In:  Journal of Geophysical Research: Solid Earth Vol. 108, No. B4 ( 2003-04)
    Details
    In: Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), Vol. 108, No. B4 ( 2003-04)
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2002JB001943
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2003
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  • 5
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    An analog experiment for the Aegean to describe the contribution of gravitational potential energy
    American Geophysical Union (AGU) ; 1997
    In:  Journal of Geophysical Research: Solid Earth Vol. 102, No. B1 ( 1997-01-10), p. 649-659
    Details
    In: Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), Vol. 102, No. B1 ( 1997-01-10), p. 649-659
    Abstract: The southern Aegean seafloor exhibits clear evidence of internal deformation (stretching) as shown by tectonics, seismology and space geodesy. We use an analog three‐layer laboratory experiment of sand, silicone putty and honey to investigate the deformation of the southern Aegean lithosphere. The model is installed in a box and confined by a vertical wall. We open a gate in the wall and observe the deformation of the two upper layers due to buoyancy forces. The general pattern of the deformation of the southern Aegean is found in the analog model. We observe the formation of an arc spreading outward with time, the extension is radial in the inner part, but parallel to the arc in the external part and of comparable importance. At both ends of the gate we observe strike‐slip motion (dextral in the western part, sinistral in the eastern part). Rotation (clockwise in the western part, counterclockwise in the eastern part) of up to 40° is seen on both sides of the gate but is also present, with a smaller amplitude, far in the internal region, partially due to distributed shear. The spreading is associated with the thinning of the two upper layers and affects a region of dimensions comparable to the length of the free boundary. This spreading does not propagate inward with time. Some pieces of material located near the active boundary remain undeformed during the experiment.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/96JB02594
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1997
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    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
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  • 6
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    Periodic instabilities during compression of the lithosphere: 2. Analogue experiments
    American Geophysical Union (AGU) ; 1994
    In:  Journal of Geophysical Research: Solid Earth Vol. 99, No. B6 ( 1994-06-10), p. 12057-12069
    Details
    In: Journal of Geophysical Research: Solid Earth, American Geophysical Union (AGU), Vol. 99, No. B6 ( 1994-06-10), p. 12057-12069
    Abstract: We have modeled the behavior of the continental and oceanic lithospheres under compression, using materials with analogous properties in laboratory experiments, to study the development of lithospheric buckling. Periodic instabilities, which are a major deformation process during the compression of the lithosphere, have already been described by several authors using an analytical perturbation method. At small strains, analogue experiments corroborate most of the results obtained by the perturbation method: (1) the deformation modes (geometrical relationships of interfaces and related wavelengths) are mainly dependent on the spatial distribution of the brittle layer(s), and (2) the amplitude of buckling is an exponential function of the horizontal strain. Some departure from the perturbation method occurs when there are two instabilities growing concurrently. The breakdown of the exponential growth occurs for strains of about 5%, and is concomitant with the appearance of thrust faults. In experiments including one brittle layer, which model the compression of the oceanic lithosphere, faults are regularly located at the inflection points of the folds. In experiments including two brittle layers, which model continental lithosphere, faults form more complicated patterns with an asymmetrical deep thrust overlain by a fan‐shaped symmetrical thrust system in the upper brittle layer. Such fault geometries give some new highlights on typical compressive geological structures such as those encountered in Central Asia.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/93JB03599
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1994
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    detail.hit.zdb_id: 161667-5
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    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
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    detail.hit.zdb_id: 3094219-6
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  • 7
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    Recent deformation in the Turan and South Kazakh platforms, western central Asia, and its relation to Arabia‐Asia and India‐Asia collisions
    American Geophysical Union (AGU) ; 1999
    In:  Tectonics Vol. 18, No. 2 ( 1999-04), p. 201-214
    Details
    In: Tectonics, American Geophysical Union (AGU), Vol. 18, No. 2 ( 1999-04), p. 201-214
    Abstract: In this study, we investigate the recent and active tectonics of the Turan and South Kazakh platforms in western central Asia. This area, which has been considered stable during the Tertiary, was struck in its eastern part (Gazli and Kyzyl‐Kum) by three earthquakes of magnitude Ms ∼7.0 between 1976 and 1984. From structural observations we show that in the Kyzyl‐Kum, Cenozoic deformation on structures oriented NW–SE is dominated by dextral strike‐slip motion on a flower structure involving reactivated Late Paleozoic faults. This deformation is compatible with the stress pattern induced by the Pamir/Tien Shan collision zone. At the scale of the Turan‐South Kazakh platform, comparison of repeated leveling measurements gives mean uplift rates of 5 mm yr −1 for most of the area south of the 44° latitude including the Kyzyl‐Kum. These observations indicate that the Turan‐South Kazakh platform has been actively deforming since recent times (Pleistocene) in response to the collision of both India and Arabia with Asia. Earthquake data also reveal that propagation of deformation from the Kopet Dagh and the Pamir/Tien Shan collision zones into the Turan‐South Kazakh platform is accommodated aseismically except in the Kyzyl‐Kum. This might reflect differences in the deformation style and nature of the upper crust in the Kyzyl‐Kum and north of the Kopet Dagh respectively. We propose that the Gazli earthquakes highlight the northwestward continuation, within the Turan‐South Kazakh platform and along reactivated older structures, of the deformation related to the Pamir indentation and to a lesser degree to the Arabia‐Asia convergence.
    Type of Medium: Online Resource
    ISSN: 0278-7407 , 1944-9194
    URL: Article
    DOI: 10.1029/1998TC900027
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1999
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  • 8
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    Neogene uplift of central eastern Patagonia: Dynamic response to active spreading ridge subduction? : DYNAMIC NEOGENE UPLIFT OF PATAGONIA
    American Geophysical Union (AGU) ; 2009
    In:  Tectonics Vol. 28, No. 2 ( 2009-04), p. n/a-n/a
    Details
    In: Tectonics, American Geophysical Union (AGU), Vol. 28, No. 2 ( 2009-04), p. n/a-n/a
    Type of Medium: Online Resource
    ISSN: 0278-7407
    URL: Article
    DOI: 10.1029/2008TC002324
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2009
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  • 9
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    Early Cretaceous to Cenozoic Growth of the Patagonian Andes as Revealed by Low‐Temperature Thermochronology
    American Geophysical Union (AGU) ; 2022
    In:  Tectonics Vol. 41, No. 10 ( 2022-10)
    Details
    In: Tectonics, American Geophysical Union (AGU), Vol. 41, No. 10 ( 2022-10)
    Abstract: We applied low‐temperature thermochronology and thermal modeling to study timing and drivers of cooling in the Patagonian Andes at the Chile triple junction A Cretaceous cooling phase between 120 and 80 Ma was detected, directly linked to the first recorded Andean orogenic phase of the Patagonian Andes A 30‐10 Ma cooling phase is related to the main phase of crustal shortening during increased convergence prior to the collision of the Chile ridge; 7‐0 Ma cooling is likely linked to glaciations rather than to the development of slab window
    Type of Medium: Online Resource
    ISSN: 0278-7407 , 1944-9194
    URL: Article
    DOI: 10.1029/2021TC007113
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2022
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  • 10
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    The present-day deformation of the central Zagros from GPS measurements : DEFORMATION OF THE CENTRAL ZAGROS FROM GPS MEASUREMENTS
    American Geophysical Union (AGU) ; 2002
    In:  Geophysical Research Letters Vol. 29, No. 19 ( 2002-10), p. 33-1-33-4
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 29, No. 19 ( 2002-10), p. 33-1-33-4
    Type of Medium: Online Resource
    ISSN: 0094-8276
    URL: Article
    DOI: 10.1029/2002GL015427
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2002
    detail.hit.zdb_id: 2021599-X
    detail.hit.zdb_id: 7403-2
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