DOI: 10.1016/j.palaeo.2013.10.016
论文题名: Sea-level changes across the Paleocene-Eocene interval in the Spanish Pyrenees, and their possible relationship with North Atlantic magmatism
作者: Pujalte V. ; Schmitz B. ; Baceta J.I.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 393 起始页码: 45
结束页码: 60
语种: 英语
英文关键词: N Atlantic magmatism
; Paleocene-Eocene interval
; PETM
; Pyrenees
; Sea-level changes
英文摘要: The issue of whether major and rapid global sea-level changes existed on a preglacial Earth can be resolved by the detailed study of the Paleocene-Eocene (P-E) interval, where a large and rapid carbon isotope excursion linked to an important global warming event, the Paleocene Eocene Thermal Maximum, allows for high-resolution correlation between terrestrial, coastal and marine settings. Based primarily on outcrop and borehole information from the Tremp-Graus Basin in the southern Spanish Pyrenees, it is shown that a sea-level fall of at least 20. m occurred less than 75. kyr prior to the PETM. This forced a seaward displacement of the shoreline of ca. 20. km, a widespread incision of valleys in the alluvial plains and the subaerial exposure and excavation of the adjacent marine carbonate platform. The subsequent sea-level rise caused the infilling of the incised valleys, a process completed before the onset of the PETM, and continued rising during and after the event, leading to the aggradation of the alluvial plain and eventually to the transgression of the whole Tremp-Graus Basin. However, the sea level did not regain its pre-fall position until near the end of the PETM. Therefore, although rising, the sea level was comparatively low in the southern Pyrenean area during most of the PETM. The pre-PETM sea-level fall has been reported in other basins of the southern Pyrenees, in the North Sea area, the Austrian Alps and in Egypt, and the subsequent sea-level rise has been documented in widely separated sites around the Earth, an evidence of their global (eustatic) scope. The causal mechanism(s) of the pre-PETM sea-level fall is (are) unresolved, although glacioeustasy may have played a role. The subsequent sea-level rise was most likely caused by tectonomagmatic activity in the North Atlantic. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69500
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Stratigraphy and Palaeontology, Faculty of Science and Technology, University of the Basque Country UPV/EHU, Ap. 644, 48080 Bilbao, Spain; Division of Nuclear Physics, Department of Physics, University of Lund, P.O. Box 118, SE-221 00 Lund, Sweden
Recommended Citation:
Pujalte V.,Schmitz B.,Baceta J.I.. Sea-level changes across the Paleocene-Eocene interval in the Spanish Pyrenees, and their possible relationship with North Atlantic magmatism[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,393