Uplift history and structure of the Transantarctic Mountains: new evidence from fission track dating of basement apatites in the Dry Valleys area, southern Victoria Land

Gleadow, A. J. W.; Fitzgerald, Paul G.

doi:10.1016/0012-821x(87)90102-6

Cited by 303 publications

(195 citation statements)

References 25 publications

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“…Hurley 1954;Armstrong 1966;Wagner and van Den Haute 1992;Farley et al 1996;Wolf et al 1996). The thermal sensitivity of the apatite fission track method referred to as partial annealing zone (PAZ; Gleadow and Fitzgerald 1987) ranges between 130 and Fig. 6 Overview of the working area.…”

Section: Mineralogy and K-ar Dating Of Fault Gougesmentioning

confidence: 99%

Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina)

Löbens

Bense

Wemmer

et al. 2010

Int J Earth Sci (Geol Rundsch)

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The Sierras Pampeanas in central and northwestern Argentina constitute a distinct morphotectonic feature between 27°S and 33°S. The last stage of uplift and deformation in this area are interpreted to be closely related to the Andean flat-slab subduction of the Nazca plate beneath the South American plate. K-Ar fault gouge dating and low-temperature thermochronology along two transects within the Sierra de Comechingones reveal a minimum age for the onset of brittle deformation about 340 Ma, very low exhumation rates since Late Paleozoic time, as well as a total exhumation of about 2.3 km since the Late Cretaceous. New Ar-Ar ages (7.54-1.91 Ma) of volcanic rocks from the San Luis volcanic belt support the eastward propagation of the flat-slab magmatic front, confirming the onset of flat-slab related deformation in this region at 11.2 Ma. Although low-temperature thermochronology does not clearly constrain the signal of the Andean uplift, it is understood that the current structural relief related to the Comechingones range has been achieved after the exhumation of both fault walls (circa 80-70 Ma).

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Section: Mineralogy and K-ar Dating Of Fault Gougesmentioning

confidence: 99%

Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina)

Löbens

Bense

Wemmer

et al. 2010

Int J Earth Sci (Geol Rundsch)

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“…It has been successfully applied to study the spatial and temporal pattern of the exhumation since the Mesozoic in Alps, Appalachia, Andes, Qinghai-Tibetan Plateau, Qingling-Dabie-Sulu etc. (e.g., Gleadow and Fitzgerald, 1987;Johnson, 1997;Gallagher et al, 1998;Willet et al, 2003;Hu et al, 2006;Richardson et al, 2008Richardson et al, , 2010Wang et al, 2009). Thus, in this study, we compile new and mostly published AFT data to better constrain the age and rate of the cooling of the Mesozoic tectonic belt (MTB) within the Yangtze Plate, provide firmer constraints on the exhumation history.…”

Section: Introductionmentioning

confidence: 96%

Diverse exhumation of the Mesozoic tectonic belt within the Yangtze Plate, China, determined by apatite fission-track thermochronology

Shan

2011

Geosci J

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New and mostly published apatite fission-track (AFT) data are compiled to reveal the exhumation of the Mesozoic tectonic belt (MTB) within the Yangtze Plate, China. New AFT ages ranging from 51 ± 3 to 108 ± 5 Ma with mean measured track lengths between 11.8 ± 1.6 and 12.8 ± 2.0 µm, are obtained for the bedrock samples collected along a southeast to northwest transect across the MTB, including the exceptional Huangling Dome in the northern Yangtze Plate. The diverse, involving the first rapid, following by a slow, and the final accelerating, cooling and inferred exhumation from the Late Mesozoic to the Cenozoic have been identified in the study region based on the AFT data and modeling. The onset of exhumation is earlier in the Huangling Dome than in the southeastern and northwestern MTB, and in the southeastern MTB than in the northwestern MTB. Similarly, the final stage of accelerating exhumation seemed to start earlier in the Huangling Dome than in the southeastern and northwestern MTB, but in the northwestern MTB than in the southeastern MTB. The diverse exhumation of the MTB should have been attributed to the far-field effect of the Pacific plate subduction in the Cretaceous to the east, and to the eastward and southeastward tectonic escape from the Tibetan plateau imposed by the India-Eurasia collision since ~55 Ma to the west.

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“…A number of studies in the TAM have suggested much lower uplift rates, -100 m/myr (Gleadow and Fitzgerald, 1987;Wilch et al, 1993).…”

Section: Uplift History Of the Transantarctic Mountains And Age Of Thmentioning

confidence: 99%

Surface exposure geochronology using cosmogenic nuclides : applications in Antarctic glacial geology

Brook¹

1993

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Cosmogenic 3 He, 2 6 A1, and 10 Be have been measured in a variety of Antarctic glacial deposits in the McMurdo Sound-Dry Valleys region. The goals of this project were to provide age constraints for Antarctic glacial events, to investigate production mechanisms of 3 He, 10Be, and 2 6 A1 in terrestrial rocks, to constrain the importance of loss of 3 He from quartz due to diffusion, and to refine methods of exposure-age dating.Moraines deposited in Arena Valley by the Taylor Glacier, an outlet glacier of the East Antarctic Ice Sheet, have exposure ages from -120 kyr to 2 myr. 1 0 Be and 3 He ages of 122 + 29 and 134 ± 54 kyr, respectively, for the Taylor II moraine are consistent with deposition during isotope stage 5e (-120 kyr) and with aerial expansions of the East Antarctic Ice Sheet during interglacial periods. Mean 1 0 Be exposure ages for older moraines in the valley are 362 + 26 kyr (Taylor III), 1.1 ± 0.1 myr (Taylor IVa) and 1.9 ± 0.1 myr (Taylor IVb). Because these older moraines were deposited at most -200 m above the Taylor II limit their ages suggest that major ice sheet advances during the last 2 myr have been broadly similar in magnitude to changes during the last glacial-interglacial cycle. 10 Be ages for stratigraphically older drift deposited by the Taylor Glacier allow extension of this conclusion to -3 myr.1 0 Be measurements in high altitude, pre-Pleistocene glacial deposits in the Dry Valleys preclude rapid uplift of the Transantarctic Mountains (400-1000 m/myr) suggested by controversial biostratigraphic studies of Sirius Group tills. Comparison of measured 10Be concentrations in Sirius Group deposits with those predicted with a model of the effects of uplift on 1 0 Be production suggests minimal uplift of the Transantarctic Mountains over the last 3 myr.3 He, 1 0 Be and 2 6 A1 ages for the "late Wisconsin" Ross Sea Drift, a glacial drift deposited on the coast of McMurdo Sound by the Ross Sea Ice Sheet, range from 8-106 kyr. The age range suggests that this deposit does not, as previous studies suggested, represent a single ice advance in response to lowered sea level at the last glacial maximum. The age range may reflect several ice sheet advances during the last glacial period.Paired measurements of 3 He and 1 0 Be in a number of quartz sandstones from the Dry Valleys region show that cosmogenic 3 He is not completely retained on time scales of greater than 200 kyr. The 3 He and 1 0 Be data, combined with measurements of 3 He concentrations in quartz as a function of grain size, suggest effective 3 He diffusion coefficients in quartz from ~10 -19 to 10-17 cm 2 s -1. These values are one to three orders of magnitude greater than previous experimental determinations extrapolated to low temperature. The data also suggest that 3 He diffusion rates in quartz do not follow simple volume diffusion trends and are probably sample dependent.Crushing quartz grains in vacuo releases variable concentrations of 3 He and 4 He and releases helium with surprisingly high isotopic compositions, u...

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Uplift history and structure of the Transantarctic Mountains: new evidence from fission track dating of basement apatites in the Dry Valleys area, southern Victoria Land

Cited by 303 publications

References 25 publications

Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina)

Exhumation and uplift of the Sierras Pampeanas: preliminary implications from K–Ar fault gouge dating and low-T thermochronology in the Sierra de Comechingones (Argentina)

Diverse exhumation of the Mesozoic tectonic belt within the Yangtze Plate, China, determined by apatite fission-track thermochronology

Surface exposure geochronology using cosmogenic nuclides : applications in Antarctic glacial geology

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