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首页> 外文期刊>Neues Jahrbuch fur Geologie und Palaontologie. Abhandlungen >Planktic foraminifera of the Danian/Selandian transition at Jabal Mundassa, Al Ain Area, United Arab Emirates
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Planktic foraminifera of the Danian/Selandian transition at Jabal Mundassa, Al Ain Area, United Arab Emirates

机译：阿拉伯联合酋长国艾恩地区贾巴尔·蒙达萨的达尼/塞拉第过渡的浮游有孔虫

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摘要

The micropaleontological record of Jabal Mundassa (Al Ain area, United Arab Emirates, Northern Oman Mountains) indicates that the Paleocene succession bears prolific index-species of planktic foraminifera of the Danian/Selandian (D/S) transition (Early-early Middle Paleocene). The succession is considered the only outcrop with Danian sediments and the most complete Paleocene succession in UAE. Based on planktic foraminifera, the Danian age is attributed to the shaley marl sediments of the Mundassa Member (MM) of the Muthaymimah Formation (MF), nonconformably overlying the Pre-Maastrichtian allochthonus Semail Ophiolite (SO, serpentinites and serpentinized peridotites). Twenty-one planktic foraminiferal species belonging to five genera were identified from fourteen samples. The duration of the hiatus at the Cretaceous/Paleogene (K/P) boundary includes two early Danian biozones. Four Danian planktic foraminiferal biozones were recorded: Parasubbotina pseudobulloides (P1a), Subbotina triloculinoides (P1b), Globanomalina compressa/Praemurica in-constans (P1c) and Praemurica uncinata (P2). In addition, the early Selandian Morozovella angulata (P3) was recognized and rests conformably on the late Danian zone (P2). The K/P depositional gap is most probably corresponding to an interval of tectonic activity that exists in many localities. The biostratigraphy and paleogeography of the identified faunas at Jabal Mundassa and other Paleocene outcrops in the UAE and Arabia are discussed.
机译：Jabal Mundassa的微古生物学记录（阿拉伯联合酋长国阿曼地区，阿曼北部阿曼地区的古生物学）表明，古新世演替具有丹尼期/西兰期（D / S）过渡期的板状有孔虫多产的索引物种（早期-中古新世） 。该演替被认为是阿拉伯联合酋长国唯一具有丹尼亚沉积物的露头和最完整的古新世演替。基于浮游有孔虫，丹尼亚时代归因于Muthaymimah组（MF）的Mundassa成员（MM）的页岩泥质沉积物，不整合地覆盖了前马斯特里赫特变质Semail蛇绿岩（SO，蛇纹石和蛇纹石橄榄岩）。从14个样品中鉴定出21个属于5个属的有孔虫。在白垩纪/古近纪（K / P）边界的裂隙持续时间包括两个早期的丹尼亚生物区。记录了四个丹宁浮游有孔虫生物区：假亚种亚种（P1a），亚细亚种（Subbotina triloculinoides）（P1b），热球菌（Globanomalina compressa / Praemurica in-constant）（P1c）和大果无子藻（Praemurica uncinata）（P2）。此外，早期的Selandian Morozovella angulata（P3）也被发现，并一致地停留在Danian晚期（P2）。 K / P沉积间隙很可能对应于许多地方存在的构造活动的间隔。讨论了贾巴尔·蒙达萨（Jabal Mundassa）和阿联酋和阿拉伯其他新世露头的已识别动物群的生物地层和古地理。

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