DOI: 10.1007/s00531-013-0976-3
Scopus记录号: 2-s2.0-84894228565
论文题名: Mesozoic exhumation history and palaeolandscape of the Iberian Massif in eastern Galicia from apatite fission-track and (U+Th)/He data
作者: Grobe R.W. ; Alvarez-Marrón J. ; Glasmacher U.A. ; Stuart F.M.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2014
卷: 103, 期: 2 起始页码: 539
结束页码: 561
语种: 英语
英文关键词: AFT and AHe thermochronology
; Late Cretaceous paleolandscape
; Long-term landscape evolution
; Mesozoic exhumation history
; NW Iberian Massif
英文摘要: Apatite fission-track (AFT) and (U+Th)/He (AHe) data, combined with time-temperature inverse modelling, reveal the cooling and exhumation history of the Iberian Massif in eastern Galicia since the Mesozoic. The continuous cooling at various rates correlates with variation of tectonic boundary conditions in the adjacent continental margins. The data provide constraints on the 107 timescale longevity of a relict paleolandscape. AFT ages range from 68 to 174 Ma with mean track lengths of 10.7 ± 2.6 to 12.6 ± 1.8 μm, and AHe ages range from 73 to 147 Ma. Fastest exhumation (≈0.25 km/Ma) occurred during the Late Jurassic to Early Cretaceous main episode of rifting in the adjacent western and northern margins. Exhumation rates have decreased since then and have been approximately one order of magnitude lower. Across inland Galicia, the AFT data are consistent with Early Cretaceous movement on post-Variscan NE trending faults. This is coeval with an extensional episode offshore. The AHe data in this region indicate less than 1.7 km of denudation in the last 100 Ma. This low exhumation suggests the attainment of a mature landscape during Late Cretaceous post-rift tectonic stability, whose remains are still preserved. The low and steady rate of denudation prevailed across inland Galicia despite minor N-S shortening in the northern margin since ≈45 Ma ago. In north Galicia, rock uplift in response to NW strike-slip faulting since Early Oligocene to Early Miocene has caused insufficient exhumation (<3 km) to remove the Mesozoic cooling signal recorded by the AFT data. © 2013 Springer-Verlag Berlin Heidelberg. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84894228565&doi=10.1007%2fs00531-013-0976-3&partnerID=40&md5=0c33ee0630226d139bc2c31f913d8d36
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70467
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Research Group Thermochronology and Archaeometry, Institute of Earth Sciences, University of Heidelberg, Postfach 103980, 69029 Heidelberg, Germany; Institute of Earth Sciences, Jaume Almera, CSIC, c/Lluis Sole i Sabaris s/n, 08028 Barcelona, Spain; Isotope Geosciences Unit, Scottish Universties Environment Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, United Kingdom
Recommended Citation:
Grobe R.W.,Alvarez-Marrón J.,Glasmacher U.A.,et al. Mesozoic exhumation history and palaeolandscape of the Iberian Massif in eastern Galicia from apatite fission-track and (U+Th)/He data[J]. International Journal of Earth Sciences,2014-01-01,103(2)