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首页> 外文期刊>Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences >Record of latest Barremian-Cenomanian environmental change in tectonically controlled depressions from the Jura-Burgundy threshold (Jura Mountains, eastern France and western Switzerland)
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Record of latest Barremian-Cenomanian environmental change in tectonically controlled depressions from the Jura-Burgundy threshold (Jura Mountains, eastern France and western Switzerland)

机译：汝拉 - 勃艮第阈值的根本控制萧条的最新屠龙 - 临曼诺曼诺郡的记录（汝拉山，东部法国和西部瑞士）

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摘要

The area of the western Jura Mountains constitutes the former Jura-Burgundy threshold between the Tethys Ocean and the epicontinental Paris Basin Sea. During the Barremian, the area was covered by a shallow-water Urgonian carbonate platform. Tectonic processes influenced the architecture of the Urgonian platform and were notably responsible for the formation of fault-related depressions on top of the Urgonian series, which were subsequently transformed into incised valleys and then to marine depocenters. Their sedimentary infills are mostly represented by the Perte-du-Rhone Formation and record stepwise environmental change on the innermost platform, which was strongly influenced by the nearby landmass. From the latest Barremian onward, sedimentation progressively changed from: i) predominantly oncoidal and detrital charophyte-rich marly limestones; to ii) heterozoan marly limestones and marls; followed by iii) detrital sediments interspersed with numerous phosphatic conglomerates. These changes are linked with the onset of the latest Barremian Taxy Episode and with the following oceanic anoxic episodes (OAE's) la to d in the neighbouring basins. The sedimentary changes are associated with sedimentary sequences which formed during 2nd-order transgressions, and which express the effect of sea level fall followed by drowning events. The presence of a rich ammonite-fauna allowed a precise biostratigraphical dating of these events during the latest Barremian to Cenomanian time interval.
机译：西部汝拉山脉的地区构成了Thethys海洋与综合巴黎盆地海洋之间的前汝拉勃艮第阈值。在Barremian期间，该地区被浅水尿液碳酸盐平台覆盖。构造过程影响了牛头扬平台的架构，并对尿液系列顶部的故障相关凹陷形成的形成，随后转变为切入谷，然后转到海景。它们的沉积填充物主要由Perte-du-rhone形成，并在最内部平台上培训逐步的环境变化，这受到附近的土地的强烈影响。从最新的篮子前进，沉淀逐渐改变：i）主要是缺乏邪教和邪教的富含草里石灰岩;到ii）杂体恶化石灰岩和玛利斯;其次是III）滴乳沉积物与许多磷酸盐粘聚物相互作用。这些变化与最新的Barremian Tathy发作的发作相关联，并在邻近的盆地中具有以下海洋缺氧事件（OAE）La至D。沉积变化与在2nd阶课程中形成的沉积序列相关，并表达了海平面落下的效果，然后是溺水事件。在最新的Barremian到Cenomanian Time Interval，致富的氨铁矿 - 动机的存在允许这一事件的精确生物数据处理这些活动。

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