法国普罗旺斯方解石U-Pb测年证明比利牛斯山碰撞早发(97-90 Ma)

IF 2.2 3区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Terra Nova Pub Date : 2023-05-31 DOI:10.1111/ter.12665

Antonin Bilau, Y. Rolland, T. Dumont, S. Schwartz, N. Godeau, A. Guihou, P. Deschamps

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引用次数: 0

摘要

晚白垩世早期普罗旺斯的隆起形成了杜兰斯地峡。通过对普罗旺斯比利牛斯山脉前陆挤压构造方解石的U-Pb测年表明，在97 ~ 90 Ma期间，通过由上至北至NW的联合逆冲作用，北-南缩短与杜兰斯地峡的外露同时发生。从比利牛斯山脉到中东地区记录的这一大规模事件被解释为非洲-欧洲板块重组的远场内部板块前兆。此外，普罗旺斯和比利牛斯之间的构造样式和缩短量的变化是由东-西向西塞文断裂和尼姆断裂的左旋重新激活所调节的，它们在这一早期碰撞背景下起着转换边界的作用。

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Early onset of Pyrenean collision (97–90 Ma) evidenced by U–Pb dating on calcite (Provence, SE France)

Early Late Cretaceous uplift of Provence gave rise to the Durance Isthmus. In the present study, U–Pb dating on calcite of compressional structures related to Pyrenean foreland compressional deformation in Provence shows that N‐S shortening occurred coeval with emersion of the Durance Isthmus, through the development of combined top‐to‐the‐North to NW thrusts between 97 and 90 Ma. This large‐scale event, recorded from the Pyrenees to the Middle‐East regions is interpreted as a far‐field internal plate precursor of the Africa‐Europe plates reorganization. Furthermore, the change in tectonic style and amount of shortening between Provence and Pyrenees was accommodated by sinistral reactivation of the NE–SW Cevennes and Nimes faults, acting as transform boundaries in this incipient collisional context.

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来源期刊

Terra Nova 地学-地球科学综合

CiteScore

4.80

自引率

8.30%

发文量

审稿时长

2.3 months

期刊介绍： Terra Nova publishes short, innovative and provocative papers of interest to a wide readership and covering the broadest spectrum of the Solid Earth and Planetary Sciences. Terra Nova encompasses geology, geophysics and geochemistry, and extends to the fluid envelopes (atmosphere, ocean, environment) whenever coupling with the Solid Earth is involved.