...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Arabian journal of geosciences >Depositional and erosional features of Oligocene paleokarsts in the Kirkuk Group, Kurdistan Region, Northeast Iraq
【24h】

Depositional and erosional features of Oligocene paleokarsts in the Kirkuk Group, Kurdistan Region, Northeast Iraq

机译：Kurdistan地区Kurdistan Room，Kurdistan Room，伊拉克东北地区寡世人Paleokarsts的沉积和侵蚀特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Paleokarst features are rarely preserved in geologic history due to terrestrial erosion and later burial diagenetic changes. In rare cases, where karstification was intense it can be preserved by burial in areas where erosion was slow. In Iraq, one of the ages that preserved clear features of the paleokarsts is the Oligocene. During this age, a thick succession of shallow (platform) carbonates were deposited and assigned stratigraphically as Kirkuk Group. During the late Oligocene, the inner shelf of the platform exposed for long time and an unconformity was developed and associated with well-developed epi- and endokarst features. The present study focused on the documentation of the erosional and depositional features of paleokarstification during the latter age for the first time in Iraq and Zagros Orogenic Belt. In the northeast Iraq, many Oligocene paleokarst features are discovered in the medium beds of Anah and Bajwan Formations (as two units of the Kirkuk Group) in the Sulaimani and Erbil Governorates. These features are such as vertical and inclined shafts filled with brown pebbly sandstone, horizontal cavities, large planoconcave cavities filled with conglomerates, solution breccias, underground solution networks, travertine, and palaeosoil. All these features are discussed to prove their attribution to the Oligocene by highlighting many field and petrographic evidences. The documented paleokarst can indicate accurately depositional extent, paleogeography, and paleoshoreline of Oligocene succession in Iraq and part of Western Zagros. Therefore, this study is significant for paleo-mapping of the northwestern margin of the Arabian plate and applicable for paleoenvironment concerns and oil explorations in the studied area.
机译：由于陆地侵蚀和后期埋地成绩变化，对地质历史上很少保存在地质历史中。在极少数情况下，喀斯蒂化强烈的情况下，它可以在侵蚀缓慢的地区被埋葬保存。在伊拉克，那些保留了古科基斯特明确特征的年龄之一是寡核苷。在此期间，沉积并将地层群作为Kirkuk组沉积和分配了厚重的浅（平台）碳酸盐。在晚期寡烯期间，长时间暴露的平台内架和不整合的内架是开发的，并与开发的ePI和endokarst特征相关联。本研究专注于在伊拉克和ZAGROS造山带的第一次在后期古古石术期间对古古典化的侵蚀和沉积特征的文件。在伊拉克东北部，许多寡头人古董的特征是在Anah和Bajwan的中床上发现（作为埃尔比尔省的埃尔比勒省的两个单位）。这些特征如垂直和倾斜的轴，填充有棕色卵石砂岩，水平腔，填充有集团，溶液Breccias，地下解决方案网络，石灰华和古角色的大型普通孔的腔。讨论了所有这些特征，以通过突出许多领域和岩体证据来证明他们对寡核苷酸的归属。记录的Paleokarst可以在伊拉克和西Zagros的一部分中准确地表明沉积的沉积程度，古地理和洋地生态和古代山脉。因此，本研究对于阿拉伯板材的西北边缘的古绘图具有重要意义，适用于研究区的古环境问题和石油探险。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号