首页> 外文期刊>Annales Societatis Geologorum Poloniae >ORIGIN OF THE PALAEOKARST IN MIOCENE EVAPORITES ON THE SW PERIPHERY OF THE EASTERN EUROPEAN PLATFORM IN THE LIGHT OF PALYNOLOGICAL STUDIES – A CASE STUDY OF THE ZOLOUSHKA CAVE, BUKOVINA, WESTERN UKRAINE
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ORIGIN OF THE PALAEOKARST IN MIOCENE EVAPORITES ON THE SW PERIPHERY OF THE EASTERN EUROPEAN PLATFORM IN THE LIGHT OF PALYNOLOGICAL STUDIES – A CASE STUDY OF THE ZOLOUSHKA CAVE, BUKOVINA, WESTERN UKRAINE

机译:从古人类学研究的角度看,古欧喀斯特在中新世蒸发的起源在东欧平台的西南边缘-以乌克兰西部布科维纳的祖鲁萨科瓦洞穴为例

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The Zoloushka Cave belongs to a group of the largest gypsum caves in Western Ukraine (Bukovina region), developed in the middle Miocene (upper Badenian) evaporite series (Tyras Formation) on the SW periphery of the East European Platform. It is developed in the lower part of the evaporite series composed of gypsum, which is covered by a carbonate layer (Ratyn Limestone). The uneven upper surface of the gypsum at the contact with the limestone, the frequent occurrence of palaeokarst forms, and the presence of karstified fissures filled with allochthonous material indicate a sedimentation break between the gypsum and the overlying limestone. To support this thesis and to add new data on the age and palaeoenvironmental conditions of palaeokarst formation in the Bukovina region, palynological studies were carried out on material from the Zoloushka Cave. Palynofacies, sporomorphs and dinoflagellate cysts were studied. In total, over 70 sporomorph taxa and over 25 dinoflagellate cyst taxa have been identified in four samples collected from the filling of the palaeokarstic forms in the cave. The results of the analysis of sporomorphs and dinoflagellate cysts point to the formation of the palaeokarst during the sedimentation break that took place at the end of the late Badenian evaporitic cycle in the Western Ukraine region. The subsequent marine transgression led to the filling of the karst forms in gypsum with chemogenic carbonate material, precipitated from marine water (draperies) and with fine-grained, clastic material (pockets and fissures).
机译:Zoloushka洞穴属于乌克兰西部(布科维纳地区)最大的石膏洞穴,它们是在东欧平台西南边缘的中新世(巴登尼亚上部)蒸发岩系列(Tyras地层)中发育的。它在由石膏组成的蒸发岩系列的下部发育,被碳酸盐层(Ratyn石灰石)覆盖。与石灰石接触的石膏上表面不平坦,古岩溶形式的频繁发生以及充满异源物质的喀斯特裂隙的存在表明了石膏和上覆的石灰石之间的沉积破裂。为了支持这一观点,并增加有关布科维纳地区古岩溶时代的年龄和古环境条件的新数据,对佐洛什卡洞穴的物质进行了孢粉学研究。孢粉,孢子体和鞭毛藻囊肿进行了研究。总共,在从洞穴中古岩溶形式的填充中收集的四个样本中,鉴定出了70多个孢子样类群和25多个鞭毛囊肿类群。孢子体和鞭毛藻囊肿的分析结果表明,在乌克兰西部巴登尼亚晚期蒸发周期结束时发生的沉积破裂期间古岩溶的形成。随后发生的海侵使石膏中的岩溶形式充满了化学成的碳酸盐材料,从海水中沉淀出来的(窗帘)和细粒的碎屑物(口袋和裂缝)。

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