Milankovitch and sub-Milankovitch forcing of the Oxfordian (Late Jurassic) Terres Noires Formation (SE France) and global implications

被引:88
作者
Boulila, S. [1 ]
Galbrun, B. [1 ]
Hinnov, L. A. [2 ]
Collin, P. -Y. [1 ]
Ogg, J. G. [3 ]
Fortwengler, D. [4 ]
Marchand, D. [5 ]
机构
[1] Univ Paris 06, CNRS, UMR 7193, Inst Sci Terre Paris, F-75252 Paris 5, France
[2] Johns Hopkins Univ, Morton K Blaustein Dept Earth & Planetary Sci, Baltimore, MD USA
[3] Purdue Univ, Dept Earth & Atmospher Sci, W Lafayette, IN 47907 USA
[4] Le Clos des Vignes, Quartier Pierry, La Begude De Mazenc, France
[5] Univ Bourgogne, UMR 5561, Dijon, France
基金
美国国家科学基金会;
关键词
PARIS BASIN; ASTRONOMICAL CALIBRATION; PRECESSIONAL CYCLES; EARTHS OBLIQUITY; LEVEL CHANGES; TIME-SCALE; CLIMATE; MIDDLE; CYCLOSTRATIGRAPHY; SEQUENCES;
D O I
10.1111/j.1365-2117.2009.00429.x
中图分类号
P [天文学、地球科学];
学科分类号
070403 [天体物理学];
摘要
High-resolution analysis (2277 samples) of magnetic susceptibility (MS) was performed on similar to 700-m-thick Early-Middle Oxfordian marine marls of the Terres Noires Formation, SE France. MS variations within these sediments record sub-Milankovitch to Milankovitch frequencies with long-term eccentricity (405 kyr and similar to 2 Myr) being the most prominent. The 405 kyr cycle was used as a high-resolution geochronometer for astronomical calibration of this poorly constrained interval of Late Jurassic time. The estimated duration of this Early-Middle Oxfordian interval concurs with the current International Geologic Time Scale GTS2004 (similar to 4 Myr), but the estimated durations of the corresponding ammonite zones are notably different. The calibration improves the resolution and accuracy of the M-sequence magnetic anomaly block model that was previously used to establish the Oxfordian time scale. Additionally, the 405 kyr cyclicity is linked to third-order sea-level depositional sequences observed for Early-Middle Oxfordian time. Strong similar to 2 Myr cycles are consistent with long-term eccentricity modulation predicted for the Late Jurassic. These cycles do not match second-order sequences that have been documented for European basins; this raises questions about the definition and hierarchy of depositional sequences in the Mesozoic eustatic chart. Our results require substantial revisions to the chart, which is frequently used as a reference for the correlation of widely separated palaeogeographic domains. Finally, a long-term trend in the MS data reflects a progressive carbonate enrichment of the marls expressing an Early Oxfordian global cooling followed gradually by a warming in the Middle Oxfordian. This trend also records a major transgressive interval likely peaking at the Transversarium ammonite zone of the Middle Oxfordian.
引用
收藏
页码:717 / 732
页数:16
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